whats_new/rules/Berolina.html

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   2   <title>Berolina Chess</title>
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   9
  10   <h1>Berolina Chess</h1>
  11
  12   <table cellpadding="20">
  13     <tr>
  14       <td><img src="FIDE.png"></td>
  15
  16       <td>
  17         <h3>Initial setup</h3>
  18
  19         <p>e1, e8: King<br>
  20         d1, d8: Queen<br>
  21         a1, a8, h1, h8: Rook<br>
  22         c1, c8, f1, f8: Bishop<br>
  23         b1, b8, g1, g8: Knight<br>
  24         a2-h2, a7-h7: Berolina Pawns</p>
  25       </td>
  26     </tr>
  27   </table>
  28
  29   <h3>Moves at a Glance</h3>
  30
  31   <p>Click on a piece below to see its moves</p>
  32
  33   <table class="board">
  34     <tr>
  35       <td class="h" id="sq0x9"></td>
  36
  37       <td class="n" id="sq1x9" onmousedown="down_click(1,-9)"
  38       onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
  39
  40       <td class="n" id="sq2x9"></td>
  41
  42       <td class="n" id="sq3x9"></td>
  43
  44       <td class="n" id="sq4x9"></td>
  45
  46       <td class="n" id="sq5x9" onmousedown="down_click(5,9)"
  47       onmouseup="up_click()"><img src="sym/BlackKing.png"></td>
  48
  49       <td class="n" id="sq6x9"></td>
  50
  51       <td class="n" id="sq7x9"></td>
  52
  53       <td class="n" id="sq8x9" onmousedown="down_click(8,9)"
  54       onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
  55
  56       <td class="h" id="sq9x9"></td>
  57
  58       <td class="h"><img src="sym/yellow.png"></td>
  59
  60       <td class="w" rowspan="2" valign="top">
  61         <p>Sliding capture or non-capture,<br>
  62         can be blocked on any square along the ray</p>
  63       </td>
  64     </tr>
  65
  66     <tr>
  67       <td class="h" id="sq0x8"></td>
  68
  69       <td class="n" id="sq1x8"></td>
  70
  71       <td class="n" id="sq2x8" onmousedown="down_click(2,0)"
  72       onmouseup="up_click()"></td>
  73
  74       <td class="n" id="sq3x8"></td>
  75
  76       <td class="n" id="sq4x8" onmousedown="down_click(4,8)"
  77       onmouseup="up_click()"><img src="sym/BlackPawn.png"></td>
  78
  79       <td class="n" id="sq5x8"></td>
  80
  81       <td class="n" id="sq6x8"></td>
  82
  83       <td class="n" id="sq7x8"></td>
  84
  85       <td class="n" id="sq8x8"></td>
  86
  87       <td class="h" id="sq9x8"></td>
  88     </tr>
  89
  90     <tr>
  91       <td class="h" id="sq0x7"></td>
  92
  93       <td class="n" id="sq1x7"></td>
  94
  95       <td class="n" id="sq2x7"></td>
  96
  97       <td class="n" id="sq3x7"></td>
  98
  99       <td class="n" id="sq4x7"></td>
 100
 101       <td class="n" id="sq5x7"></td>
 102
 103       <td class="n" id="sq6x7"></td>
 104
 105       <td class="n" id="sq7x7"></td>
 106
 107       <td class="n" id="sq8x7"></td>
 108
 109       <td class="h" id="sq9x7"></td>
 110
 111       <td class="h"><img src="sym/orange.png"></td>
 112
 113       <td class="w">Unblockable leap (capture or non-capture)</td>
 114     </tr>
 115
 116     <tr>
 117       <td class="h" id="sq0x6"></td>
 118
 119       <td class="n" id="sq1x6"><img src="sym/WhitePawn.png"></td>
 120
 121       <td class="n" id="sq2x6" onmousedown="down_click(2,6)"
 122       onmouseup="up_click()"><img src="sym/BlackPawn.png"></td>
 123
 124       <td class="n" id="sq3x6" onmousedown="down_click(3,-6)"
 125       onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
 126
 127       <td class="n" id="sq4x6"></td>
 128
 129       <td class="n" id="sq5x6"></td>
 130
 131       <td class="n" id="sq6x6"></td>
 132
 133       <td class="n" id="sq7x6"></td>
 134
 135       <td class="n" id="sq8x6"></td>
 136
 137       <td class="h" id="sq9x6"></td>
 138
 139       <td class="h"><img src="sym/green.png"></td>
 140
 141       <td class="w">Non-capture only</td>
 142     </tr>
 143
 144     <tr>
 145       <td class="h" id="sq0x5"></td>
 146
 147       <td class="n" id="sq1x5"></td>
 148
 149       <td class="n" id="sq2x5"></td>
 150
 151       <td class="n" id="sq3x5"></td>
 152
 153       <td class="n" id="sq4x5"></td>
 154
 155       <td class="n" id="sq5x5"></td>
 156
 157       <td class="n" id="sq6x5"></td>
 158
 159       <td class="n" id="sq7x5"></td>
 160
 161       <td class="n" id="sq8x5"></td>
 162
 163       <td class="h" id="sq9x5"></td>
 164
 165       <td class="h"><img src="sym/red.png"></td>
 166
 167       <td class="w">Capture only</td>
 168     </tr>
 169
 170     <tr>
 171       <td class="h" id="sq0x4"></td>
 172
 173       <td class="n" id="sq1x4"></td>
 174
 175       <td class="n" id="sq2x4"></td>
 176
 177       <td class="n" id="sq3x4"></td>
 178
 179       <td class="n" id="sq4x4"></td>
 180
 181       <td class="n" id="sq5x4"></td>
 182
 183       <td class="n" id="sq6x4"></td>
 184
 185       <td class="n" id="sq7x4"></td>
 186
 187       <td class="n" id="sq8x4"></td>
 188
 189       <td class="h" id="sq9x4"></td>
 190     </tr>
 191
 192     <tr>
 193       <td class="h" id="sq0x3"></td>
 194
 195       <td class="n" id="sq1x3"></td>
 196
 197       <td class="n" id="sq2x3"></td>
 198
 199       <td class="n" id="sq3x3" onmousedown="down_click(3,3)"
 200       onmouseup="up_click()"><img src="sym/WhiteRook.png"></td>
 201
 202       <td class="n" id="sq4x3" onmousedown="down_click(4,3)"
 203       onmouseup="up_click()"><img src="sym/WhiteKnight.png"></td>
 204
 205       <td class="n" id="sq5x3" onmousedown="down_click(5,3)"
 206       onmouseup="up_click()"><img src="sym/WhiteQueen.png"></td>
 207
 208       <td class="n" id="sq6x3" onmousedown="down_click(6,3)"
 209       onmouseup="up_click()"><img src="sym/WhiteBishop.png"></td>
 210
 211       <td class="n" id="sq7x3" onmousedown="down_click(7,3)"
 212       onmouseup="up_click()"><img src="sym/WhiteKing.png"></td>
 213
 214       <td class="n" id="sq8x3"></td>
 215
 216       <td class="h" id="sq9x3"></td>
 217     </tr>
 218
 219     <tr>
 220       <td class="h" id="sq0x2"></td>
 221
 222       <td class="n" id="sq1x2"></td>
 223
 224       <td class="n" id="sq2x2"></td>
 225
 226       <td class="n" id="sq3x2"></td>
 227
 228       <td class="n" id="sq4x2"></td>
 229
 230       <td class="n" id="sq5x2"></td>
 231
 232       <td class="n" id="sq6x2"></td>
 233
 234       <td class="n" id="sq7x2"></td>
 235
 236       <td class="n" id="sq8x2"></td>
 237
 238       <td class="h" id="sq9x2"></td>
 239     </tr>
 240
 241     <tr>
 242       <td class="h" id="sq0x1"></td>
 243
 244       <td class="n" id="sq1x1"></td>
 245
 246       <td class="n" id="sq2x1"></td>
 247
 248       <td class="n" id="sq3x1"></td>
 249
 250       <td class="n" id="sq4x1"></td>
 251
 252       <td class="n" id="sq5x1"></td>
 253
 254       <td class="n" id="sq6x1"></td>
 255
 256       <td class="n" id="sq7x1"></td>
 257
 258       <td class="n" id="sq8x1"></td>
 259
 260       <td class="h" id="sq9x1"></td>
 261     </tr>
 262
 263     <tr>
 264       <td class="h" id="sq0x0"></td>
 265
 266       <td class="n" id="sq1x0"></td>
 267
 268       <td class="n" id="sq2x0"></td>
 269
 270       <td class="n" id="sq3x0"></td>
 271
 272       <td class="n" id="sq4x0"></td>
 273
 274       <td class="n" id="sq5x0"></td>
 275
 276       <td class="n" id="sq6x0"></td>
 277
 278       <td class="n" id="sq7x0"></td>
 279
 280       <td class="n" id="sq8x0"></td>
 281
 282       <td class="h" id="sq9x0"></td>
 283     </tr>
 284   </table>
 285
 286   <p id="piece" height="20">:<br>
 287   :<br>
 288   :<br>
 289   :</p>
 290
 291   <table cellpadding="5" border="1">
 292     <tr>
 293       <td>Piece</td>
 294
 295       <td>ID</td>
 296
 297       <td>value</td>
 298
 299       <td>Moves (<a href="Betza.html">Betza notation</a>)</td>
 300
 301       <td>Remarks</td>
 302     </tr>
 303
 304     <tr>
 305       <td>King</td>
 306
 307       <td>K</td>
 308
 309       <td>-</td>
 310
 311       <td>K</td>
 312
 313       <td>Can castle with Rook, moving 2 steps towards it</td>
 314     </tr>
 315
 316     <tr>
 317       <td>Queen</td>
 318
 319       <td>Q</td>
 320
 321       <td>9.5</td>
 322
 323       <td>RB or Q</td>
 324
 325       <td></td>
 326     </tr>
 327
 328     <tr>
 329       <td>Rook</td>
 330
 331       <td>R</td>
 332
 333       <td>5</td>
 334
 335       <td>R</td>
 336
 337       <td></td>
 338     </tr>
 339
 340     <tr>
 341       <td>Bishop</td>
 342
 343       <td>B</td>
 344
 345       <td>3.25</td>
 346
 347       <td>B</td>
 348
 349       <td>Color-bound</td>
 350     </tr>
 351
 352     <tr>
 353       <td>Knight</td>
 354
 355       <td>N</td>
 356
 357       <td>3.25</td>
 358
 359       <td></td>
 360
 361       <td>N</td>
 362     </tr>
 363
 364     <tr>
 365       <td>Berolina Pawn</td>
 366
 367       <td>P</td>
 368
 369       <td>1</td>
 370
 371       <td>mfFcfW</td>
 372
 373       <td>Promotes to Q, R, B, or N on reaching last rank</td>
 374     </tr>
 375   </table>
 376
 377   <h3>Pawn peculiarities</h3>
 378
 379   <ul>
 380     <li>Pawns capture differently from how they move (diagonal
 381     move, straight capture).</li>
 382
 383     <li>Pawns can move two squares <i>diagonally</i> ahead from
 384     their initial position, provided they are not blocked.</li>
 385
 386     <li>On the move immediately after such a double push, they can
 387     be captured en passant by another Pawn, as if they had only
 388     moved 1 square ahead.</li>
 389
 390     <li>A diagonal move to the square skipped by the previous Pawn
 391     move is thus <b>not</b> an e.p. capture.</li>
 392
 393     <li>Pawns promote to another (non-royal) piece of choice when
 394     they reach last rank.</li>
 395   </ul>
 396
 397   <h3>Castling</h3>
 398
 399   <p>A King that has not moved before can move two squares in the
 400   direction of a Rook that has not moved before, in which case that
 401   Rook is moved to the square the King skipped over. This is only
 402   allowed if all squares between King and Rook are empty, when the
 403   King is not in check on the square it came from, and would not be
 404   in check on any of the squares it skipped over.</p>
 405
 406   <h3>General rules</h3>
 407
 408   <ul>
 409     <li>It is not allowed to expose your King to check.</li>
 410
 411     <li>The game is won by checkmating the opponent's King.</li>
 412
 413     <li>Stalemate (no legal moves, but not in check) is a
 414     draw.</li>
 415   </ul>
 416
 417   <h3>Differences with FIDE</h3>
 418
 419   <p>The capture and non-capture move of the Pawns have been
 420   swapped. As a result the initial double-push is also
 421   diagonal.</p>
 422
 423   <h3>Strategy issues</h3>
 424
 425   <p>It is not possible to force checkmate on a bare King with just
 426   a single Bishop or Knight (in addition to your own King). Two
 427   Knights cannot do that either.</p>
 428
 429   <p>Bishops are confined to squares of a single color. Having
 430   Bishops on both colors compensates this weakness, and is worth an
 431   extra 0.5 on top of their added value.</p>
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