whats_new/rules/Capablanca.html

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   9
  10   <h1>Capablanca Chess</h1>
  11
  12   <table cellpadding="20">
  13     <tr>
  14       <td><img src="Capablanca.png"></td>
  15
  16       <td>
  17         <h3>Initial setup</h3>
  18
  19         <p>f1, f8: King<br>
  20         e1, e8: Queen<br>
  21         h1, h8: Chancellor<br>
  22         c1, c8: Archbishop<br>
  23         a1, a8, j1, j8: Rook<br>
  24         d1, d8, g1, g8: Bishop<br>
  25         b1, b8, i1, i8: Knight<br>
  26         a2-j2, a7-j7: Pawns</p>
  27       </td>
  28     </tr>
  29   </table>
  30
  31   <h3>Moves at a Glance</h3>
  32
  33   <p>Click on a piece below to see its moves</p>
  34
  35   <table class="board">
  36     <tr>
  37       <td class="n" id="sq0x9" onmousedown="down_click(0,-9)"
  38       onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
  39
  40       <td class="n" id="sq1x9"></td>
  41
  42       <td class="n" id="sq2x9"></td>
  43
  44       <td class="n" id="sq3x9"></td>
  45
  46       <td class="n" id="sq4x9"></td>
  47
  48       <td class="n" id="sq5x9" onmousedown="down_click(5,-9)"
  49       onmouseup="up_click()"><img src="sym/BlackKing.png"></td>
  50
  51       <td class="n" id="sq6x9"></td>
  52
  53       <td class="n" id="sq7x9"></td>
  54
  55       <td class="n" id="sq8x9"></td>
  56
  57       <td class="n" id="sq9x9" onmousedown="down_click(9,9)"
  58       onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
  59
  60       <td class="h"><img src="sym/yellow.png"></td>
  61
  62       <td class="w" rowspan="2" valign="top">
  63         <p>Sliding capture or non-capture,<br>
  64         can be blocked on any square along the ray</p>
  65       </td>
  66     </tr>
  67
  68     <tr>
  69       <td class="n" id="sq0x8"></td>
  70
  71       <td class="n" id="sq1x8"></td>
  72
  73       <td class="n" id="sq2x8" onmousedown="down_click(2,0)"
  74       onmouseup="up_click()"></td>
  75
  76       <td class="n" id="sq3x8"></td>
  77
  78       <td class="n" id="sq4x8"></td>
  79
  80       <td class="n" id="sq5x8"></td>
  81
  82       <td class="n" id="sq6x8"></td>
  83
  84       <td class="n" id="sq7x8"></td>
  85
  86       <td class="n" id="sq8x8"></td>
  87
  88       <td class="n" id="sq9x8"></td>
  89     </tr>
  90
  91     <tr>
  92       <td class="n" id="sq0x7"></td>
  93
  94       <td class="n" id="sq1x7"></td>
  95
  96       <td class="n" id="sq2x7"></td>
  97
  98       <td class="n" id="sq3x7"></td>
  99
 100       <td class="n" id="sq4x7"></td>
 101
 102       <td class="n" id="sq5x7"></td>
 103
 104       <td class="n" id="sq6x7"></td>
 105
 106       <td class="n" id="sq7x7"></td>
 107
 108       <td class="n" id="sq8x7"></td>
 109
 110       <td class="n" id="sq9x7"></td>
 111
 112       <td class="h"><img src="sym/orange.png"></td>
 113
 114       <td class="w">Unblockable leap (capture or non-capture)</td>
 115     </tr>
 116
 117     <tr>
 118       <td class="n" id="sq0x6"></td>
 119
 120       <td class="n" id="sq1x6"></td>
 121
 122       <td class="n" id="sq2x6"></td>
 123
 124       <td class="n" id="sq3x6"></td>
 125
 126       <td class="n" id="sq4x6"></td>
 127
 128       <td class="n" id="sq5x6" onmousedown="down_click(5,6)"
 129       onmouseup="up_click()"><img src=
 130       "sym/WhiteArchbishop.png"></td>
 131
 132       <td class="n" id="sq6x6"></td>
 133
 134       <td class="n" id="sq7x6"></td>
 135
 136       <td class="n" id="sq8x6"></td>
 137
 138       <td class="n" id="sq9x6"></td>
 139
 140       <td class="h"><img src="sym/green.png"></td>
 141
 142       <td class="w">Non-capture only</td>
 143     </tr>
 144
 145     <tr>
 146       <td class="n" id="sq0x5"></td>
 147
 148       <td class="n" id="sq1x5"></td>
 149
 150       <td class="n" id="sq2x5"></td>
 151
 152       <td class="n" id="sq3x5"></td>
 153
 154       <td class="n" id="sq4x5"></td>
 155
 156       <td class="n" id="sq5x5"></td>
 157
 158       <td class="n" id="sq6x5"></td>
 159
 160       <td class="n" id="sq7x5"></td>
 161
 162       <td class="n" id="sq8x5"></td>
 163
 164       <td class="n" id="sq9x5"></td>
 165
 166       <td class="h"><img src="sym/red.png"></td>
 167
 168       <td class="w">Capture only</td>
 169     </tr>
 170
 171     <tr>
 172       <td class="n" id="sq0x4"></td>
 173
 174       <td class="n" id="sq1x4"></td>
 175
 176       <td class="n" id="sq2x4"></td>
 177
 178       <td class="n" id="sq3x4"></td>
 179
 180       <td class="n" id="sq4x4"></td>
 181
 182       <td class="n" id="sq5x4" onmousedown="down_click(5,4)"
 183       onmouseup="up_click()"><img src="sym/WhiteMarshall.png"></td>
 184
 185       <td class="n" id="sq6x4"></td>
 186
 187       <td class="n" id="sq7x4"></td>
 188
 189       <td class="n" id="sq8x4"></td>
 190
 191       <td class="n" id="sq9x4"></td>
 192     </tr>
 193
 194     <tr>
 195       <td class="n" id="sq0x3"></td>
 196
 197       <td class="n" id="sq1x3" onmousedown="down_click(1,3)"
 198       onmouseup="up_click()"><img src="sym/BlackPawn.png"></td>
 199
 200       <td class="n" id="sq2x3" onmousedown="down_click(2,3)"
 201       onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
 202
 203       <td class="n" id="sq3x3" onmousedown="down_click(3,3)"
 204       onmouseup="up_click()"><img src="sym/WhiteRook.png"></td>
 205
 206       <td class="n" id="sq4x3" onmousedown="down_click(4,3)"
 207       onmouseup="up_click()"><img src="sym/WhiteKnight.png"></td>
 208
 209       <td class="n" id="sq5x3" onmousedown="down_click(5,3)"
 210       onmouseup="up_click()"><img src="sym/WhiteQueen.png"></td>
 211
 212       <td class="n" id="sq6x3" onmousedown="down_click(6,3)"
 213       onmouseup="up_click()"><img src="sym/WhiteBishop.png"></td>
 214
 215       <td class="n" id="sq7x3" onmousedown="down_click(7,3)"
 216       onmouseup="up_click()"><img src="sym/WhiteKing.png"></td>
 217
 218       <td class="n" id="sq8x3"></td>
 219
 220       <td class="n" id="sq9x3"></td>
 221     </tr>
 222
 223     <tr>
 224       <td class="n" id="sq0x2"></td>
 225
 226       <td class="n" id="sq1x2"></td>
 227
 228       <td class="n" id="sq2x2"></td>
 229
 230       <td class="n" id="sq3x2"></td>
 231
 232       <td class="n" id="sq4x2"></td>
 233
 234       <td class="n" id="sq5x2"></td>
 235
 236       <td class="n" id="sq6x2"></td>
 237
 238       <td class="n" id="sq7x2"></td>
 239
 240       <td class="n" id="sq8x2"></td>
 241
 242       <td class="n" id="sq9x2"></td>
 243     </tr>
 244
 245     <tr>
 246       <td class="n" id="sq0x1"></td>
 247
 248       <td class="n" id="sq1x1"></td>
 249
 250       <td class="n" id="sq2x1" onmousedown="down_click(-2,1)"
 251       onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
 252
 253       <td class="n" id="sq3x1"></td>
 254
 255       <td class="n" id="sq4x1"></td>
 256
 257       <td class="n" id="sq5x1"></td>
 258
 259       <td class="n" id="sq6x1"></td>
 260
 261       <td class="n" id="sq7x1"></td>
 262
 263       <td class="n" id="sq8x1"></td>
 264
 265       <td class="n" id="sq9x1"></td>
 266     </tr>
 267
 268     <tr>
 269       <td class="n" id="sq0x0"></td>
 270
 271       <td class="n" id="sq1x0"></td>
 272
 273       <td class="n" id="sq2x0"></td>
 274
 275       <td class="n" id="sq3x0"></td>
 276
 277       <td class="n" id="sq4x0"></td>
 278
 279       <td class="n" id="sq5x0"></td>
 280
 281       <td class="n" id="sq6x0"></td>
 282
 283       <td class="n" id="sq7x0"></td>
 284
 285       <td class="n" id="sq8x0"></td>
 286
 287       <td class="n" id="sq9x0"></td>
 288     </tr>
 289   </table>
 290
 291   <p id="piece" height="20">:<br>
 292   :<br>
 293   :<br>
 294   :</p>
 295
 296   <table cellpadding="5" border="1">
 297     <tr>
 298       <td>Piece</td>
 299
 300       <td>ID</td>
 301
 302       <td>value</td>
 303
 304       <td>Moves (<a href="Betza.html">Betza notation</a>)</td>
 305
 306       <td>Remarks</td>
 307     </tr>
 308
 309     <tr>
 310       <td>King</td>
 311
 312       <td>K</td>
 313
 314       <td>-</td>
 315
 316       <td>K</td>
 317
 318       <td>Can castle with Rook, moving 3 steps towards it</td>
 319     </tr>
 320
 321     <tr>
 322       <td>Queen</td>
 323
 324       <td>Q</td>
 325
 326       <td>9.5</td>
 327
 328       <td>RB or Q</td>
 329
 330       <td></td>
 331     </tr>
 332
 333     <tr>
 334       <td>Chancellor</td>
 335
 336       <td>C</td>
 337
 338       <td>9</td>
 339
 340       <td>RN</td>
 341
 342       <td></td>
 343     </tr>
 344
 345     <tr>
 346       <td>ArchBishop</td>
 347
 348       <td>A</td>
 349
 350       <td>8.75</td>
 351
 352       <td>BN</td>
 353
 354       <td></td>
 355     </tr>
 356
 357     <tr>
 358       <td>Rook</td>
 359
 360       <td>R</td>
 361
 362       <td>5</td>
 363
 364       <td>R</td>
 365
 366       <td></td>
 367     </tr>
 368
 369     <tr>
 370       <td>Bishop</td>
 371
 372       <td>B</td>
 373
 374       <td>3.5</td>
 375
 376       <td>B</td>
 377
 378       <td>Color-bound</td>
 379     </tr>
 380
 381     <tr>
 382       <td>Knight</td>
 383
 384       <td>N</td>
 385
 386       <td>3</td>
 387
 388       <td>N</td>
 389
 390       <td></td>
 391     </tr>
 392
 393     <tr>
 394       <td>Pawn</td>
 395
 396       <td>P</td>
 397
 398       <td>1</td>
 399
 400       <td>mfWcfF</td>
 401
 402       <td>Promotes to Q, C, A, R, B, or N on reaching last
 403       rank</td>
 404     </tr>
 405   </table>
 406
 407   <h3>Pawn peculiarities</h3>
 408
 409   <ul>
 410     <li>Pawns capture differently from how they move (straight
 411     move, diagonal capture).</li>
 412
 413     <li>Pawns can move two squares ahead from their initial
 414     position, provided they are not blocked.</li>
 415
 416     <li>On the move immediately after such a double push, they can
 417     be captured en passant by another Pawn, as if they had only
 418     moved 1 square ahead.</li>
 419
 420     <li>Pawns promote to another (non-royal) piece of choice when
 421     they reach last rank.</li>
 422   </ul>
 423
 424   <h3>Castling</h3>
 425
 426   <p>A King that has not moved before can move <b>three</b> squares
 427   in the direction of a Rook that has not moved before, in which
 428   case that Rook is moved to the square next to the King on the
 429   other side. This is only allowed if all squares between King and
 430   Rook are empty, when the King is not in check on the square it
 431   came from, and would not be in check on any of the squares it
 432   skipped over.</p>
 433
 434   <h3>General rules</h3>
 435
 436   <ul>
 437     <li>It is not allowed to expose your King to check.</li>
 438
 439     <li>The game is won by checkmating the opponent's King.</li>
 440
 441     <li>Stalemate (no legal moves, but not in check) is a
 442     draw.</li>
 443   </ul>
 444
 445   <h3>Differences with FIDE</h3>
 446
 447   <p>The Chancellor and Archbishop pieces are extra, and the board
 448   is expanded to accomodate them. To handle the larger board width,
 449   the King moves 3 squares on castling.</p>
 450
 451   <h3>Strategy issues</h3>
 452
 453   <p>It is not possible to force checkmate on a bare King with just
 454   a single Bishop or Knight (in addition to your own King). Two
 455   Knights cannot do that either. The Archbishop can force checkmate
 456   against a bare King.</p>
 457
 458   <p>Bishops are confined to squares of a single color. Having
 459   Bishops on both colors compensates this weakness, and is worth an
 460   extra 0.5 on top of their added value.</p>
 461
 462   <p>As Chancellor and Archbishop are nearly equal in value to
 463   Queen, under-promotion is very common.</p>
 464
 465   <p>The super-pieces (Q, C, A) devaluate by the presence of
 466   lower-valued opponent pieces. As a result trading Q for R + B is
 467   in general a good trade when you still have A and C, as the
 468   latter gain in value by eliminating the opponent's R and B, which
 469   is more compensation than the intrinsic value difference between
 470   Q and R + B.</p>
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