fairymax.c

   1 /***************************************************************************/\r
   2 /*                               fairy-Max,                                */\r
   3 /* Version of the sub-2KB (source) micro-Max Chess program, fused to a     */\r
   4 /* generic WinBoard interface, loading its move-generator tables from file */\r
   5 /***************************************************************************/\r
   6 \r
   7      /*****************************************************************/\r
   8      /*                      LICENCE NOTIFICATION                     */\r
   9      /* Fairy-Max 4.8 is free software, and you have my permission do */\r
  10      /* with it whatever you want, whether it is commercial or not.   */\r
  11      /* Note, however, that Fairy-Max can easily be configured through*/\r
  12      /* its fmax.ini file to play Chess variants that are legally pro-*/\r
  13      /* tected by patents, and that to do so would also require per-  */\r
  14      /* mission of the holders of such patents. No guarantees are     */\r
  15      /* given that Fairy-Max does anything in particular, or that it  */\r
  16      /* would not wreck the hardware it runs on, and running it is    */\r
  17      /* entirely for your own risk.  H.G,Muller, author of Fairy-Max  */\r
  18      /*****************************************************************/\r
  19 \r
  20 #define MULTIPATH\r
  21 #define VERSION "4.8N"\r
  22 \r
  23 #include <stdio.h>\r
  24 #include <stdlib.h>\r
  25 #include <string.h>\r
  26 #include <signal.h>\r
  27 #include <time.h>\r
  28 \r
  29 #ifndef INI_FILE \r
  30 #define INI_FILE "fmax.ini"\r
  31 #endif\r
  32 \r
  33 #ifdef WIN32 \r
  34 #    include <windows.h>\r
  35 #else\r
  36 #    include <sys/time.h>\r
  37      int GetTickCount() // with thanks to Tord\r
  38      {  struct timeval t;\r
  39         gettimeofday(&t, NULL);\r
  40         return t.tv_sec*1000 + t.tv_usec/1000;\r
  41      }\r
  42 #endif\r
  43 \r
  44 int StartKey;\r
  45 \r
  46 #define EMPTY -1\r
  47 #define WHITE 0\r
  48 #define BLACK 16\r
  49 \r
  50 #define STATE 128\r
  51 \r
  52 /* The following macros indicate the differences between Fairy-Max and its */\r
  53 /* dedicated Shatranj derivative ShaMax so that these can now be compiled  */\r
  54 /* from the same unified source file.                                      */\r
  55 /* Compile with gcc option -DSHATRANJ to build ShaMax.                     */\r
  56 #ifdef SHATRANJ\r
  57 #    define FAC 175\r
  58 #    define EG  13\r
  59 #    define NAME "ShaMax"\r
  60 #    define SHAMAX(x) x\r
  61 #    define FMAX(x)\r
  62 #else\r
  63 #    define FAC 128\r
  64 #    define EG  10\r
  65 #    define NAME "Fairy-Max"\r
  66 #    define SHAMAX(x)\r
  67 #    define FMAX(x) x\r
  68 #endif\r
  69 \r
  70 /* make unique integer from engine move representation */\r
  71 #define PACK_MOVE 256*K + L;\r
  72 \r
  73 /* convert intger argument back to engine move representation */\r
  74 #define UNPACK_MOVE(A) K = (A)>>8 & 255; L = (A) & 255;\r
  75 \r
  76 /* Global variables visible to engine. Normally they */\r
  77 /* would be replaced by the names under which these  */\r
  78 /* are known to your engine, so that they can be     */\r
  79 /* manipulated directly by the interface.            */\r
  80 \r
  81 int Side;\r
  82 int Move;\r
  83 int PromPiece;\r
  84 int Result;\r
  85 int TimeLeft;\r
  86 int MovesLeft;\r
  87 int MaxDepth;\r
  88 int Post;\r
  89 int Fifty;\r
  90 int UnderProm;\r
  91 int GameNr;\r
  92 int Resign;\r
  93 int Threshold = 800;\r
  94 int Score;\r
  95 char piecename[32], piecetype[32], blacktype[32];\r
  96 char *inifile = INI_FILE;\r
  97 \r
  98 int Ticks, tlim, Setup, SetupQ;\r
  99 \r
 100 int GameHistory[1024];\r
 101 char HistoryBoards[1024][STATE], setupPosition[131];\r
 102 int GamePtr, HistPtr;\r
 103 \r
 104 #define W while\r
 105 #define K(A,B) *(int*)(T+A+S*(B&31))\r
 106 #define J(A) K(y+A,b[y])-K(x+A,u)-K(H+A,t)\r
 107 \r
 108 int U=(1<<23)-1;\r
 109 struct _ {int K,V;char X,Y,D,F;} *A;           /* hash table, 16M+8 entries*/\r
 110 \r
 111 int M=136,S=128,I=8e3,Q,O,K,N,j,R,J,Z,LL,      /* M=0x88                   */\r
 112 BW,BH,sh,\r
 113 w[16]={0,2,2,-1,7,8,12,23,7,5},                /* relative piece values    */\r
 114 o[256],\r
 115 oo[32],                                        /* initial piece setup      */\r
 116 of[256],\r
 117 od[16];                                        /* 1st dir. in o[] per piece*/\r
 118 \r
 119 signed char L,pl[17],\r
 120 b[513],                                        /* board: 16x8+dummy, + PST */\r
 121 T[4104],                                       /* hash translation table   */\r
 122 centr[32],\r
 123 n[]=".*XKNBRQEWFMACHG?x+knbrqewfmachg";        /* piece symbols on printout*/\r
 124 \r
 125 int pv[10000],*sp=pv; // triangular array\r
 126 int margin;\r
 127 \r
 128 pboard()\r
 129 {int i;\r
 130  i=-1;W(++i<128)printf(" %c",(i&15)==BW&&(i+=15-BW)?10:n[b[i]&31]);\r
 131 }\r
 132          \r
 133 \r
 134 D(k,q,l,e,E,z,n)        /* recursive minimax search, k=moving side, n=depth*/\r
 135 int k,q,l,e,E,z,n;      /* (q,l)=window, e=current eval. score, E=e.p. sqr.*/\r
 136 {                       /* e=score, z=prev.dest; J,Z=hashkeys; return score*/\r
 137  int j,r,m,v,d,h,i,F,G,P,V,f=J,g=Z,C,s,flag,FF,*ps=sp;\r
 138  signed char t,p,u,x,y,X,Y,H,B;\r
 139  struct _*a=A+(J+(k+S)*E&U-1);                 /* lookup pos. in hash table*/\r
 140  *sp++=0;\r
 141  q-=q<e;l-=l<=e;                               /* adj. window: delay bonus */\r
 142  d=a->D;m=a->V;X=a->F;Y=a->Y;                  /* resume at stored depth   */\r
 143  if(a->K-Z|z&S  |                              /* miss: other pos. or empty*/\r
 144   !(m<=q|X&8&&m>=l|X&S))                       /*   or window incompatible */\r
 145   d=Y=0;                                       /* start iter. from scratch */\r
 146  X=a->X;                                       /* start at best-move hint  */\r
 147  W(d++<n||d<3||              /*** min depth = 2   iterative deepening loop */\r
 148    z&S&&K==I&&(GetTickCount()-Ticks<tlim&d<=MaxDepth|| /* root: deepen upto time   */\r
 149    (K=X,L=Y&~S,Score=m,d=3)))                  /* time's up: go do best    */\r
 150  {x=B=X;                                       /* start scan at prev. best */\r
 151   h=Y&S;                                       /* request try noncastl. 1st*/\r
 152   P=d>2&&l+I?D(16-k,-l,1-l,-e,2*S,2*S,d-3):I;  /* search null move         */\r
 153   m=-P<l|R<5?d-2?-I:e:-P;   /*** prune if > beta  unconsidered:static eval */\r
 154   SHAMAX( if(pl[k]<=1&pl[16-k]>1)m=I-1; )      /* bare king loses          */\r
 155   N++;                                         /* node count (for timing)  */\r
 156   do{u=b[x];                                   /* scan board looking for   */\r
 157    if(u&&(u&16)==k)                            /*  own piece (inefficient!)*/\r
 158    {r=p=u&15;                                  /* p = piece type (set r>0) */\r
 159     j=od[p];                                   /* first step vector f.piece*/\r
 160     W(r=o[++j])                                /* loop over directions o[] */\r
 161     {A:                                        /* resume normal after best */\r
 162      flag=h?3:of[j];                           /* move modes (for fairies) */\r
 163      y=x;F=FF=G=S;                             /* (x,y)=move, (F,G)=castl.R*/\r
 164      do{                                       /* y traverses ray, or:     */\r
 165       H=y=h?Y^h:y+r;                           /* sneak in prev. best move */\r
 166       if(flag&1<<8)H=y=(y&15)>13?y+BW:(y&15)>=BW?y-BW:y; /* cylinder board */\r
 167       if(y&S|(y&15)>=BW)break;                 /* board edge hit           */\r
 168 #ifdef MULTIPATH\r
 169       if(flag&1<<9)                            /* if multipath move        */\r
 170       {t=flag>>12;                             /* get dir. stepped twice   */\r
 171        if(b[x+t]){if(b[y-2*t]|b[y-t])break;}else \r
 172        if(b[x+2*t]&&b[y-t])break;              /* test if empty path exists*/\r
 173       }\r
 174 #endif\r
 175       m=E<16|(E^112)<16&&flag&1&y-E<2&E-y<2?I:m;      /* bad castling  */\r
 176       if(p<3&y==E)H=z&127;                     /* shift capt.sqr. H if e.p.*/\r
 177       t=b[H];\r
 178       if(flag&1+!t)                            /* mode (capt/nonc) allowed?*/\r
 179       {if(t&&(t&16)==k)break;                  /* capture own              */\r
 180        i=w[t&15]+((t&192)>>sh);                /* value of capt. piece t   */\r
 181        if(i<0)m=I,d=98;                        /* K capture                */\r
 182        if(m>=l&d>1)goto C;                     /* abort on fail high       */\r
 183        v=d-1?e:i-p;                            /*** MVV/LVA scoring if d=1**/\r
 184        if(d-!t>1)                              /*** all captures if d=2  ***/\r
 185        {v=centr[p]?b[x+257]-b[y+257]:0;        /* center positional pts.   */\r
 186         b[G]=b[H]=b[x]=0;b[y]=u|32;            /* do move, set non-virgin  */\r
 187         if(!(G&S))b[FF]=k+6,v+=50;             /* castling: put R & score  */\r
 188         v-=w[p]>0|R<EG?0:20;                   /*** freeze K in mid-game ***/\r
 189         if(p<3)                                /* pawns:                   */\r
 190         {v-=9*((x-2&M||b[x-2]-u)+              /* structure, undefended    */\r
 191                (x+2&M||b[x+2]-u)               /*        squares plus bias */\r
 192               +(w[b[x^16]&15]<0))              /*** cling to magnetic K ***/\r
 193               +(R-76>>2);                      /* end-game Pawn-push bonus */\r
 194          b[y]+=V=y+r+1&S?647-p:2*(u&y+16&32);  /* upgrade P or convert to Q*/\r
 195          V>>=sh;                               /* for Shatranj promo to F  */\r
 196          i+=V;                                 /* promotion / passer bonus */\r
 197         } if(z&S && GamePtr<6) v+=(rand()>>10&31)-16;\r
 198         J+=J(0);Z+=J(4)+G-S;\r
 199         SHAMAX( pl[k]-=!!t; )                  /* count pieces per side    */\r
 200         v+=e+i;V=m>q?m:q;                      /*** new eval & alpha    ****/\r
 201         if(z&S)V=m-margin>q?m-margin:q;        /* multiPV                  */\r
 202         C=d-1-(d>5&p>2&!t&!h);                 /* nw depth, reduce non-cpt.*/\r
 203         C=R<EG|P-I|d<3||t&&p-3?C:d;            /* extend 1 ply if in-check */\r
 204         do\r
 205          s=C>2|v>V?-D(16-k,-l,-V,-v,/*** futility, recursive eval. of reply */\r
 206                                      F,y&255,C):v;\r
 207         W(s>q&++C<d); v=s;                     /* no fail:re-srch unreduced*/\r
 208         if(v>V&v<l){int *p=sp;\r
 209          sp=ps+1;\r
 210          W(*sp++=*p++);\r
 211          *ps=256*x+y;\r
 212         }\r
 213         if(z&S&&K-I)                           /* move pending: check legal*/\r
 214         {if(v+I&&x==K&y==L)                    /*   if move found          */\r
 215          {Q=-e-i;O=F;LL=L;\r
 216           if(b[y]-u&15)b[y]-=PromPiece,        /* under-promotion, correct */\r
 217                        J+=PromPiece;           /*  piece & invalidate hash */\r
 218           a->D=99;a->V=0;                      /* lock game in hash as draw*/\r
 219           R-=i/FAC;                            /*** total captd material ***/\r
 220           Fifty = t|p<3?0:Fifty+1;\r
 221           sp=ps;\r
 222                      return l;}                /*   & not in check, signal */\r
 223          v=m;                                  /* (prevent fail-lows on    */\r
 224         }                                      /*   K-capt. replies)       */\r
 225         J=f;Z=g;\r
 226         SHAMAX( pl[k]+=!!t; )\r
 227         b[G]=k+6;b[FF]=b[y]=0;b[x]=u;b[H]=t;   /* undo move,G can be dummy */\r
 228        }                                       /*          if non-castling */\r
 229        if(z&S&&Post&v>V&v<l){int *p=ps;char X,Y;\r
 230         printf("%2d ",d-2);\r
 231         printf("%6d ",v);\r
 232         printf("%8d %10d",(GetTickCount()-Ticks)/10,N);\r
 233         while(*p){X=*p>>8;Y=*p++;\r
 234         printf(" %c%c%c%c",'a'+(X&15),'8'-(X>>4),'a'+(Y&15),'8'-(Y>>4&7));}\r
 235         printf("\n");fflush(stdout);\r
 236        }       if(v>m)                                 /* new best, update max,best*/\r
 237         m=v,X=x,Y=y|S&F;                       /* mark non-double with S   */\r
 238        if(h){h=0;goto A;}                      /* redo after doing old best*/\r
 239       }\r
 240       s=t;\r
 241       if(flag&15^4|u&32||                      /* no double or moved before*/\r
 242          p>2&&                                 /* no P & no lateral K move,*/\r
 243          ((b[G=r<0?x&~15:BW-1|x&112]^32)<33    /* no virgin R in corner G, */\r
 244          ||b[G^1]|b[G^2]|b[FF=r<0?G+3:G-2])    /* no 2 empty sq. next to R */\r
 245         )t+=flag&4;                            /* fake capt. for nonsliding*/\r
 246       else F=y;                                /* enable e.p.              */\r
 247       if(s&&flag&8)t=0,flag^=flag>>4&15;       /* hoppers go to next phase */\r
 248       if(!(flag&S))                            /* zig-zag piece?           */\r
 249        r^=flag>>12,flag^=flag>>4&15;           /* alternate vector & mode  */\r
 250      }W(!t);                                   /* if not capt. continue ray*/\r
 251    }}\r
 252    if((++x&15)>=BW)x=x+16&112;                 /* next sqr. of board, wrap */\r
 253   }W(x-B);           \r
 254 C:FMAX( m=m+I|P==I?m:(X=Y=0); )                /* if stalemate, draw-score */\r
 255   if(a->D<99)                                  /* protect game history     */\r
 256    a->K=Z,a->V=m,a->D=d,a->X=X,                /* always store in hash tab */\r
 257    a->F=8*(m>q)|S*(m<l),a->Y=Y;                /* move, type (bound/exact),*/\r
 258   }                                            /*    encoded in X S,8 bits */\r
 259 if(z&4*S)K=X,L=Y&~S;\r
 260  sp=ps;\r
 261  return m+=m<e;                                /* delayed-loss bonus       */\r
 262 }\r
 263 \r
 264 \r
 265 /* Generic main() for Winboard-compatible engine     */\r
 266 /* (Inspired by TSCP)                                */\r
 267 /* Author: H.G. Muller                               */\r
 268 \r
 269 /* The engine is invoked through the following       */\r
 270 /* subroutines, that can draw on the global vaiables */\r
 271 /* that are maintained by the interface:             */\r
 272 /* Side         side to move                         */\r
 273 /* Move         move input to or output from engine  */\r
 274 /* PromPiece    requested piece on promotion move    */\r
 275 /* TimeLeft     ms left to next time control         */\r
 276 /* MovesLeft    nr of moves to play within TimeLeft  */\r
 277 /* MaxDepth     search-depth limit in ply            */\r
 278 /* Post         boolean to invite engine babble      */\r
 279 \r
 280 /* InitEngine() progran start-up initialization      */\r
 281 /* InitGame()   initialization to start new game     */\r
 282 /*              (sets Side, but not time control)    */\r
 283 /* Think()      think up move from current position  */\r
 284 /*              (leaves move in Move, can be invalid */\r
 285 /*               if position is check- or stalemate) */\r
 286 /* DoMove()     perform the move in Move             */\r
 287 /*              (togglese Side)                      */\r
 288 /* ReadMove()   convert input move to engine format  */\r
 289 /* PrintMove()  print Move on standard output        */\r
 290 /* Legal()      check Move for legality              */\r
 291 /* ClearBoard() make board empty                     */\r
 292 /* PutPiece()   put a piece on the board             */\r
 293 \r
 294 /* define this to the codes used in your engine,     */\r
 295 /* if the engine hasn't defined it already.          */\r
 296 \r
 297 int PrintResult(int s)\r
 298 {\r
 299         int i, j, k, cnt=0;\r
 300 \r
 301         /* search last 50 states with this stm for third repeat */\r
 302         for(j=2; j<=100 && j <= HistPtr; j+=2)\r
 303         {\r
 304             for(k=0; k<STATE; k++)\r
 305                 if(HistoryBoards[HistPtr][k] !=\r
 306                    HistoryBoards[HistPtr-j&1023][k] )\r
 307                    {\r
 308                      goto differs;}\r
 309             /* is the same, count it */\r
 310             if(++cnt > 1) /* third repeat */\r
 311             {\r
 312                 printf("1/2-1/2 {Draw by repetition}\n");\r
 313                 return 1;\r
 314             }\r
 315           differs: ;\r
 316         }\r
 317         K=I;\r
 318         cnt = D(s,-I,I,Q,O,LL|4*S,3);\r
 319         if(cnt>-I+1 && K==0 && L==0) {\r
 320                 printf("1/2-1/2 {Stalemate}\n");\r
 321                 return 2;\r
 322         }\r
 323         if(cnt==-I+1) {\r
 324                 if (s == WHITE)\r
 325                         printf("0-1 {Black mates}\n");\r
 326                 else\r
 327                         printf("1-0 {White mates}\n");\r
 328                 return 3;\r
 329         }\r
 330         if(Fifty >=100) {\r
 331                 printf("1/2-1/2 {Draw by fifty move rule}\n");\r
 332                 return 4;\r
 333         }\r
 334 #ifdef SHATRANJ\r
 335         if(pl[s]==1 && pl[16-s]==1) {\r
 336                 printf("1/2-1/2 {Insufficient mating material}\n");\r
 337                 return 4;\r
 338         }\r
 339         if(pl[s]<=1 && pl[16-s]>1) {\r
 340                 if (s == BLACK)\r
 341                         printf("0-1 {Bare King}\n");\r
 342                 else\r
 343                         printf("1-0 {Bare King}\n");\r
 344                 return 5;\r
 345         }\r
 346 #endif\r
 347         return 0;\r
 348 }\r
 349 \r
 350 \r
 351 InitEngine()\r
 352 {\r
 353  int i, j;\r
 354 \r
 355  N=32*S+7;W(N-->S+3)T[N]=rand()>>9;\r
 356  srand(GetTickCount());\r
 357 }\r
 358 \r
 359 InitGame()\r
 360 {\r
 361  int i,j;\r
 362 \r
 363  for(i=0;i<16*BH;i++)b[i]=0;\r
 364  K=BW;W(K--)\r
 365  {b[K]=oo[K+16]+16;b[K+112]=oo[K];b[K+16]=18;b[K+96]=1; /* initial board setup*/\r
 366   L=8;W(L--)b[16*L+K+257]=(K-BW/2)*(K-BW/2)+(L-3.5)*(L-3.5); /* center-pts table   */\r
 367  }                                                   /*(in unused half b[])*/\r
 368  Side = WHITE; Q=0; O=S;\r
 369  Fifty = 0; R = 0;\r
 370  for(i=0; i<BW; i++) if(i!=3) R += (w[oo[i]]/FAC) + (w[oo[i+16]]/FAC);\r
 371  UnderProm = -1; pl[WHITE] = pl[BLACK] = 2*BW;\r
 372 }\r
 373 \r
 374 void CopyBoard(int s)\r
 375 {\r
 376         int i, j, k, cnt=0;\r
 377 \r
 378         /* copy game representation of engine to HistoryBoard */\r
 379         /* don't forget castling rights and e.p. state!       */\r
 380         for(i=0; i<BH; i++)\r
 381         for(j=0; j<BW; j++)                 /* board squares  */\r
 382             HistoryBoards[s][BW*i+j] = b[16*i+j]|64*(16*i+j==O);\r
 383 }\r
 384                                          \r
 385 void PrintVariants()\r
 386 {\r
 387         int i, j, count=0; char c, buf[80];\r
 388         FILE *f;\r
 389 \r
 390         f = fopen(INI_FILE, "r");\r
 391         if(f==NULL) return;\r
 392 \r
 393         /* search for game names in definition file */\r
 394         do {\r
 395            while(fscanf(f, "Game: %s", buf) != 1 && c != EOF) \r
 396                while((c = fgetc(f)) != EOF && c != '\n');\r
 397            if(c == EOF) break;\r
 398            if(count++) printf(",");\r
 399            printf("%s", buf);\r
 400         } while(c != EOF);\r
 401 \r
 402         fclose(f);\r
 403 }\r
 404 \r
 405 void PrintOptions()\r
 406 {\r
 407         printf("feature option=\"Resign -check %d\"\n", Resign);\r
 408         printf("feature option=\"Resign Threshold -spin %d 200 1200\"\n", Threshold);\r
 409         printf("feature option=\"Ini File -file %s\"\n", inifile);\r
 410         printf("feature option=\"Multi-PV Margin -spin %d 0 1000\"\n", margin);\r
 411         printf("feature option=\"Playing Style ;-) -combo Brilliant /// *Brave /// Beautiful\"\n");\r
 412         printf("feature option=\"Dummy Slider Example -slider 20 0 100\"\n");\r
 413         printf("feature option=\"Dummy String Example -file happy birthday!\"\n");\r
 414         printf("feature option=\"Dummy Path Example -path .\"\n");\r
 415         printf("feature option=\"Clear Hash -button\"\n");\r
 416         printf("feature done=1\n");\r
 417 }\r
 418                                          \r
 419 int LoadGame(char *name)\r
 420 {\r
 421         int i, j, count=0; char c, buf[80];\r
 422         static int currentVariant;\r
 423         FILE *f;\r
 424 \r
 425         f = fopen(inifile, "r");\r
 426         if(f==NULL)\r
 427         {   printf("telluser piece-desription file '%s'  not found\n", inifile);\r
 428             exit(0);\r
 429         }\r
 430         if(fscanf(f, "version 4.8(%c)", &c)!=1 || c != 'w')\r
 431         { printf("telluser incompatible fmax.ini file\n"); exit(0); }\r
 432 \r
 433         if(name != NULL)\r
 434         {  /* search for game name in definition file */\r
 435            while(fscanf(f, "Game: %s", buf)!=1 || strcmp(name, buf) ) {\r
 436                while((c = fgetc(f)) != EOF && c != '\n');\r
 437                count++;\r
 438                if(c == EOF) {\r
 439                    printf("telluser variant %s not supported\n", name);\r
 440                    fclose(f);\r
 441                    return; /* keep old settings */\r
 442                }\r
 443            }\r
 444            currentVariant = count;\r
 445         }\r
 446 \r
 447         /* We have found variant, or if none specified, are at beginning of file */\r
 448         if(fscanf(f, "%dx%d", &BW, &BH)!=2 || BW>12 || BH!=8)\r
 449         { printf("telluser unsupported board size %dx%d\n",BW,BH); exit(0); }\r
 450 \r
 451         for(i=0; i<BW; i++) fscanf(f, "%d", oo+i);\r
 452         for(i=0; i<BW; i++) fscanf(f, "%d", oo+i+16);\r
 453         for(i= 0; i<=U; i++)\r
 454             A[i].K = A[i].D = A[i].X = A[i].Y = A[i].F = 0; /* clear hash */\r
 455         for(i=0; i<32; i++) piecetype[i] = blacktype[i] = 0;\r
 456 \r
 457         i=0; j=-1; c=0;\r
 458         while(fscanf(f, "%d,%x", o+j, of+j)==2 ||\r
 459                                       fscanf(f,"%c:%d",&c, w+i+1)==2)\r
 460         {   if(c)\r
 461             { od[++i]=j; centr[i] = c>='a';\r
 462               blacktype[c&31]=i; piecename[i]=c&31;\r
 463               if(piecetype[c&31]==0) piecetype[c&31]=i; // only first\r
 464             }\r
 465             j++; o[j]=0;\r
 466             /* printf("# c='%c' i=%d od[i]=%d j=%d (%3d,%8x)\n",c?c:' ',i,od[i],j,o[j-1],of[j-1]); /**/\r
 467             c=0; if(i>15 || j>255) break;\r
 468         }\r
 469 \r
 470         fclose(f);\r
 471         sh = w[7] < 250 ? 3 : 0;\r
 472 }\r
 473 \r
 474 int main(int argc, char **argv)\r
 475 {\r
 476         int Computer, MaxTime, MaxMoves, TimeInc, sec, i, j;\r
 477         char line[256], command[256], c, cc;\r
 478         int m, nr;\r
 479         FILE *f;\r
 480 \r
 481         if(argc>1 && sscanf(argv[1], "%d", &m)==1)\r
 482         { U = (1<<m)-1; argc--; argv++; }\r
 483         A = (struct _ *) calloc(U+1, sizeof(struct _));\r
 484         if(argc>1) inifile = argv[1];\r
 485 \r
 486         signal(SIGINT, SIG_IGN);\r
 487         printf("tellics say     " NAME " " VERSION "\n");\r
 488         printf("tellics say     by H.G. Muller\n");\r
 489         printf("tellics say Gothic Chess is protected by U.S. patent #6,481,716 by Ed Trice.\n");\r
 490         printf("tellics say Falcon Chess is protected by U.S. patent #5,690,334 by George W. Duke\n");\r
 491         InitEngine();\r
 492         LoadGame(NULL);\r
 493         InitGame();\r
 494         Computer = EMPTY;\r
 495         MaxTime  = 10000;  /* 10 sec */\r
 496         MaxDepth = 30;     /* maximum depth of your search */\r
 497 \r
 498         for (;;) {\r
 499                 fflush(stdout);\r
 500                 if (Side == Computer) {\r
 501                         /* think up & do move, measure time used  */\r
 502                         /* it is the responsibility of the engine */\r
 503                         /* to control its search time based on    */\r
 504                         /* MovesLeft, TimeLeft, MaxMoves, TimeInc */\r
 505                         /* Next 'MovesLeft' moves have to be done */\r
 506                         /* within TimeLeft+(MovesLeft-1)*TimeInc  */\r
 507                         /* If MovesLeft<0 all remaining moves of  */\r
 508                         /* the game have to be done in this time. */\r
 509                         /* If MaxMoves=1 any leftover time is lost*/\r
 510                         Ticks = GetTickCount();\r
 511                         m = MovesLeft<=0 ? 40 : MovesLeft;\r
 512                         tlim = (0.6-0.06*(BW-8))*(TimeLeft+(m-1)*TimeInc)/(m+7);\r
 513                         if(tlim>TimeLeft/15) tlim = TimeLeft/15;\r
 514                         PromPiece = 0; /* Always promote to Queen ourselves */\r
 515                         N=0;K=I;\r
 516                         if (D(Side,-I,I,Q,O,LL|S,3)==I) {\r
 517                             Side ^= BLACK^WHITE;\r
 518                             if(UnderProm>=0 && UnderProm != L)\r
 519                             {    printf("tellics I hate under-promotions!\n");\r
 520                                  printf("resign { underpromotion } \n");\r
 521                                  Computer = EMPTY;\r
 522                                  continue;\r
 523                             } else UnderProm = -1;\r
 524                             printf("move ");\r
 525                             printf("%c%c%c%c",'a'+(K&15),'0'+BH-(K>>4),\r
 526                                           'a'+(L&15),'0'+BH-(L>>4));\r
 527                             printf("\n");\r
 528                             m = GetTickCount() - Ticks;\r
 529 \r
 530                             /* time-control accounting */\r
 531                             TimeLeft -= m;\r
 532                             TimeLeft += TimeInc;\r
 533                             if(--MovesLeft == 0) {\r
 534                                 MovesLeft = MaxMoves;\r
 535                                 if(MaxMoves == 1)\r
 536                                      TimeLeft  = MaxTime;\r
 537                                 else TimeLeft += MaxTime;\r
 538                             }\r
 539 \r
 540                             GameHistory[GamePtr++] = PACK_MOVE;\r
 541                             CopyBoard(HistPtr=HistPtr+1&1023);\r
 542                             if(Resign && Score <= -Threshold) { \r
 543                                 printf("resign\n"); Computer=EMPTY;\r
 544                             } else if(PrintResult(Side))\r
 545                                 Computer = EMPTY;\r
 546                         } else {\r
 547                             if(!PrintResult(Side))\r
 548                                 printf("resign { refuses own move }\n");\r
 549                             Computer = EMPTY;\r
 550                         }\r
 551                         continue;\r
 552                 }\r
 553                 if (!fgets(line, 256, stdin))\r
 554                         return;\r
 555                 if (line[0] == '\n')\r
 556                         continue;\r
 557                 sscanf(line, "%s", command);\r
 558                 if (!strcmp(command, "xboard"))\r
 559                         continue;\r
 560                 if (!strcmp(command, "protover")) {\r
 561                         printf("feature myname=\"" NAME " " VERSION "\"\n");\r
 562                         printf("feature memory=1\n");\r
 563                         printf("feature setboard=0 ping=1 done=0\n");\r
 564                         printf("feature variants=\"");\r
 565                         PrintVariants();\r
 566                         printf("\"\n");\r
 567                         PrintOptions();\r
 568                         continue;\r
 569                 }\r
 570                 if (!strcmp(command, "ping")) { int nr=0;\r
 571                         sscanf(line, "ping %d", &nr);\r
 572                         printf("pong %d\n", nr);\r
 573                         continue;\r
 574                 }\r
 575                 if (!strcmp(command, "p")) {\r
 576                         pboard();\r
 577                         continue;\r
 578                 }\r
 579                 if (!strcmp(command, "memory")) {\r
 580                         int mem, mask;\r
 581                         sscanf(line+6, "%d", &mem); mem = (mem*1024*1024)/12; // max nr of hash entries\r
 582                         mask = 0x7FFFFFFF; while(mask > mem) mask >>= 1;\r
 583                         if(mask != U) {\r
 584                             free(A); U = mask;\r
 585                             A = (struct _ *) calloc(U+1, sizeof(struct _));\r
 586                         }\r
 587                         continue;\r
 588                 }\r
 589                 if (!strcmp(command, "new")) {\r
 590                         /* start new game */\r
 591                         LoadGame("normal");\r
 592                         InitGame();\r
 593                         GamePtr   = Setup = 0;\r
 594                         GameNr++;\r
 595                         HistPtr   = 0;\r
 596                         Computer  = BLACK;\r
 597                         TimeLeft  = MaxTime;\r
 598                         MovesLeft = MaxMoves;\r
 599                         for(nr=0; nr<1024; nr++)\r
 600                             for(m=0; m<STATE; m++)\r
 601                                 HistoryBoards[nr][m] = 0;\r
 602                         continue;\r
 603                 }\r
 604                 if (!strcmp(command, "quit"))\r
 605                         /* exit engine */\r
 606                         return;\r
 607                 if (!strcmp(command, "force")) {\r
 608                         /* computer plays neither */\r
 609                         Computer = EMPTY;\r
 610                         continue;\r
 611                 }\r
 612                 if (!strcmp(command, "white")) {\r
 613                         /* set white to move in current position */\r
 614                         Side     = WHITE;\r
 615                         Computer = BLACK;\r
 616                         continue;\r
 617                 }\r
 618                 if (!strcmp(command, "black")) {\r
 619                         /* set blck to move in current position */\r
 620                         Side     = BLACK;\r
 621                         Computer = WHITE;\r
 622                         continue;\r
 623                 }\r
 624                 if (!strcmp(command, "st")) {\r
 625                         /* move-on-the-bell mode     */\r
 626                         /* indicated by MaxMoves = 1 */\r
 627                         sscanf(line, "st %d", &MaxTime);\r
 628                         MovesLeft = MaxMoves = 1;\r
 629                         TimeLeft  = MaxTime *= 1000;\r
 630                         TimeInc   = 0;\r
 631                         continue;\r
 632                 }\r
 633                 if (!strcmp(command, "sd")) {\r
 634                         /* set depth limit (remains in force */\r
 635                         /* until next 'sd n' command)        */\r
 636                         sscanf(line, "sd %d", &MaxDepth);\r
 637                         MaxDepth += 2; /* QS depth */\r
 638                         continue;\r
 639                 }\r
 640                 if (!strcmp(command, "level")) {\r
 641                         /* normal or blitz time control */\r
 642                         sec = 0;\r
 643                         if(sscanf(line, "level %d %d %d",\r
 644                                  &MaxMoves, &MaxTime, &TimeInc)!=3 &&\r
 645                            sscanf(line, "level %d %d:%d %d",\r
 646                                  &MaxMoves, &MaxTime, &sec, &TimeInc)!=4)\r
 647                              continue;\r
 648                         MovesLeft = MaxMoves;\r
 649                         TimeLeft  = MaxTime = 60000*MaxTime + 1000*sec;\r
 650                         TimeInc  *= 1000;\r
 651                         continue;\r
 652                 }\r
 653                 if (!strcmp(command, "time")) {\r
 654                         /* set time left on clock */\r
 655                         sscanf(line, "time %d", &TimeLeft);\r
 656                         TimeLeft  *= 10; /* centi-sec to ms */\r
 657                         continue;\r
 658                 }\r
 659                 if (!strcmp(command, "otim")) {\r
 660                         /* opponent's time (not kept, so ignore) */\r
 661                         continue;\r
 662                 }\r
 663                 if (!strcmp(command, "easy")) {\r
 664                         continue;\r
 665                 }\r
 666                 if (!strcmp(command, "hard")) {\r
 667                         continue;\r
 668                 }\r
 669                 if (!strcmp(command, "accepted")) {\r
 670                         continue;\r
 671                 }\r
 672                 if (!strcmp(command, "rejected")) {\r
 673                         continue;\r
 674                 }\r
 675                 if (!strcmp(command, "random")) {\r
 676                         continue;\r
 677                 }\r
 678                 if (!strcmp(command, "option")) {\r
 679                         int i; static char filename[80];\r
 680                         if(sscanf(line+7, "Resign=%d", &Resign) == 1) continue;\r
 681                         if(sscanf(line+7, "Resign Threshold=%d", &Threshold) == 1) continue;\r
 682                         if(sscanf(line+7, "Ini File=%s", filename) == 1) {\r
 683                                 inifile = filename; continue;\r
 684                         }\r
 685                         if(sscanf(line+7, "Clear Hash") == 1) for(i=0; i<U; i++) A->K = 0;\r
 686                         if(sscanf(line+7, "MultiVariation Margin=%d", &margin) == 1) continue;\r
 687                         continue;\r
 688                 }\r
 689                 if (!strcmp(command, "go")) {\r
 690                         /* set computer to play current side to move */\r
 691                         Computer = Side;\r
 692                         MovesLeft = -(GamePtr+(Side==WHITE)>>1);\r
 693                         while(MaxMoves>0 && MovesLeft<=0)\r
 694                             MovesLeft += MaxMoves;\r
 695                         continue;\r
 696                 }\r
 697                 if (!strcmp(command, "hint")) {\r
 698                         Ticks = GetTickCount(); tlim = 1000;\r
 699                         D(Side,-I,I,Q,O,LL|4*S,6);\r
 700                         if (K==0 && L==0)\r
 701                                 continue;\r
 702                         printf("Hint: ");\r
 703                         printf("%c%c%c%c",'a'+(K&7),'8'-(K>>4),\r
 704                                           'a'+(L&7),'8'-(L>>4));\r
 705                         printf("\n");\r
 706                         continue;\r
 707                 }\r
 708                 if (!strcmp(command, "undo")   && (nr=1) ||\r
 709                     !strcmp(command, "remove") && (nr=2)   ) {\r
 710                         /* 'take back' moves by replaying game */\r
 711                         /* from history until desired ply      */\r
 712                         if (GamePtr - nr < 0)\r
 713                                 continue;\r
 714                         GamePtr -= nr;\r
 715                         HistPtr -= nr;   /* erase history boards */\r
 716                         while(nr-- > 0)  \r
 717                             for(m=0; m<STATE; m++)\r
 718                                 HistoryBoards[HistPtr+nr+1&1023][m] = 0;\r
 719                         InitGame();\r
 720                         if(Setup) {\r
 721                             for(i=0; i<128; i++) b[i] = setupPosition[i];\r
 722                             Side = setupPosition[128]; Q = SetupQ;\r
 723                             pl[WHITE] = setupPosition[129];\r
 724                             pl[BLACK] = setupPosition[130];\r
 725                         }\r
 726                         for(i=0; i<=U; i++) A[i].D = A[i].K = 0; // clear hash table\r
 727                         for(nr=0; nr<GamePtr; nr++) {\r
 728                             UNPACK_MOVE(GameHistory[nr]);\r
 729                             D(Side,-I,I,Q,O,LL|S,3);\r
 730                             Side ^= BLACK^WHITE;\r
 731                         }\r
 732                         continue;\r
 733                 }\r
 734                 if (!strcmp(command, "post")) {\r
 735                         Post = 1;\r
 736                         continue;\r
 737                 }\r
 738                 if (!strcmp(command, "nopost")) {\r
 739                         Post = 0;\r
 740                         continue;\r
 741                 }\r
 742                 if (!strcmp(command, "variant")) {\r
 743                         sscanf(line, "variant %s", command);\r
 744                         LoadGame(command);\r
 745                         InitGame(); Setup = 0;\r
 746                         continue;\r
 747                 }\r
 748                 if (!strcmp(command, "edit")) {\r
 749                         int color = WHITE, p;\r
 750 \r
 751                         while(fgets(line, 256, stdin)) {\r
 752                                 m = line[0];\r
 753                                 if(m=='.') break;\r
 754                                 if(m=='#') {\r
 755                                         for(i=0; i<128; i++) b[i]=0;\r
 756                                         Q=0; R=0; O=S;\r
 757                                         pl[WHITE]=pl[BLACK]=0;\r
 758                                         continue;\r
 759                                 }\r
 760                                 if(m=='c') {\r
 761                                         color = WHITE+BLACK - color;\r
 762                                         Q = -Q;\r
 763                                         continue;\r
 764                                 }\r
 765                                 if( m >= 'A' && m <= 'Z' && piecetype[m&31]\r
 766                                     && line[1] >= 'a' && line[1] <= 'a'+BW-1\r
 767                                     && line[2] >= '1' && line[2] <= '0'+BH) {\r
 768                                         m = line[1]-16*line[2]+799;\r
 769                                         switch(p = (color == WHITE ? piecetype : blacktype)[line[0]&31])\r
 770                                         {\r
 771                                         case 1:\r
 772                                         case 2:\r
 773                                             if(color==WHITE)\r
 774                                                  b[m]=(m&0x70)==0x60?1:33,\r
 775                                                  Q+=w[1];\r
 776                                             else b[m]=(m&0x70)==0x10?18:50,\r
 777                                                  Q+=w[2];\r
 778                                             break;\r
 779                                         default:\r
 780                                             b[m]=p+color+32; // assume non-virgin\r
 781                                             if(w[p]<0) { // Royal piece on original square: virgin
 782                                                 if(color==BLACK && m<0x10 && p==oo[m+16] ||\r
 783                                                    color==WHITE && m>0x6F && p==oo[m-0x70]) b[m] -= 32;
 784                                             } else { Q+=w[p]; R+=w[p]/FAC; }
 785                                             if((m==0x00 || m==BW-1   ) && color==BLACK && p==oo[m+16] ||\r
 786                                                (m==0x70 || m==0x6F+BW) && color==WHITE && p==oo[m-0x70])\r
 787                                                 b[m] &= ~32; // corner piece as in original setup: virgin\r
 788                                         case 0: // undefined piece, ignore\r
 789                                             break;\r
 790                                         }\r
 791                                         pl[BLACK+WHITE-color]++;\r
 792                                         continue;\r
 793                                 }\r
 794                         }\r
 795                         if(Side != color) Q = -Q;\r
 796                         GamePtr = HistPtr = 0; Setup = 1; SetupQ = Q; // start anew\r
 797                         for(i=0; i<128; i++) setupPosition[i] = b[i]; // remember position\r
 798                         setupPosition[128] = Side;\r
 799                         setupPosition[129] = pl[WHITE];\r
 800                         setupPosition[130] = pl[BLACK];\r
 801                         continue;\r
 802                 }\r
 803                 /* command not recognized, assume input move */\r
 804                 m = line[0]<'a' | line[0]>='a'+BW | line[1]<'1' | line[1]>='1'+BH |\r
 805                     line[2]<'a' | line[2]>='a'+BW | line[3]<'1' | line[3]>='1'+BH;\r
 806                 if(line[4] == '\n') line[4] = piecename[7];\r
 807                 PromPiece = 7 - (Side == WHITE ? piecetype : blacktype)[line[4]&31];\r
 808                     if(PromPiece == 7) PromPiece = 0;\r
 809                 {char *c=line; K=c[0]-16*c[1]+799;L=c[2]-16*c[3]+799; }\r
 810                 if (m)\r
 811                         /* doesn't have move syntax */\r
 812                         printf("Error (unknown command): %s\n", command);\r
 813                 else if(D(Side,-I,I,Q,O,LL|S,3)!=I) {\r
 814                         /* did have move syntax, but illegal move */\r
 815                         printf("Illegal move:%s\n", line);\r
 816                 } else {  /* legal move, perform it */\r
 817                         GameHistory[GamePtr++] = PACK_MOVE;\r
 818                         Side ^= BLACK^WHITE;\r
 819                         CopyBoard(HistPtr=HistPtr+1&1023);\r
 820                         if(PrintResult(Side)) Computer = EMPTY;\r
 821                 }\r
 822         }\r
 823 }\r