whats_new/rules/Cylinder.html

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   2   <title>Cylinder Chess</title>
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   9
  10   <h1>Cylinder 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: 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"></td>
  72
  73       <td class="n" id="sq3x8"></td>
  74
  75       <td class="n" id="sq4x8"></td>
  76
  77       <td class="n" id="sq5x8"></td>
  78
  79       <td class="n" id="sq6x8"></td>
  80
  81       <td class="n" id="sq7x8"></td>
  82
  83       <td class="n" id="sq8x8"></td>
  84
  85       <td class="h" id="sq9x8"></td>
  86     </tr>
  87
  88     <tr>
  89       <td class="h" id="sq0x7"></td>
  90
  91       <td class="n" id="sq1x7"></td>
  92
  93       <td class="n" id="sq2x7"></td>
  94
  95       <td class="n" id="sq3x7"></td>
  96
  97       <td class="n" id="sq4x7"></td>
  98
  99       <td class="n" id="sq5x7"></td>
 100
 101       <td class="n" id="sq6x7"></td>
 102
 103       <td class="n" id="sq7x7"></td>
 104
 105       <td class="n" id="sq8x7"></td>
 106
 107       <td class="h" id="sq9x7"></td>
 108
 109       <td class="h"><img src="sym/orange.png"></td>
 110
 111       <td class="w">Unblockable leap (capture or non-capture)</td>
 112     </tr>
 113
 114     <tr>
 115       <td class="h" id="sq0x6"></td>
 116
 117       <td class="n" id="sq1x6"></td>
 118
 119       <td class="n" id="sq2x6"></td>
 120
 121       <td class="n" id="sq3x6"></td>
 122
 123       <td class="n" id="sq4x6"></td>
 124
 125       <td class="n" id="sq5x6"></td>
 126
 127       <td class="n" id="sq6x6"></td>
 128
 129       <td class="n" id="sq7x6"></td>
 130
 131       <td class="n" id="sq8x6"></td>
 132
 133       <td class="h" id="sq9x6"></td>
 134
 135       <td class="h"><img src="sym/green.png"></td>
 136
 137       <td class="w">Non-capture only</td>
 138     </tr>
 139
 140     <tr>
 141       <td class="h" id="sq0x5"></td>
 142
 143       <td class="n" id="sq1x5"></td>
 144
 145       <td class="n" id="sq2x5"></td>
 146
 147       <td class="n" id="sq3x5"></td>
 148
 149       <td class="n" id="sq4x5"></td>
 150
 151       <td class="n" id="sq5x5"></td>
 152
 153       <td class="n" id="sq6x5"></td>
 154
 155       <td class="n" id="sq7x5"></td>
 156
 157       <td class="n" id="sq8x5"></td>
 158
 159       <td class="h" id="sq9x5"></td>
 160
 161       <td class="h"><img src="sym/red.png"></td>
 162
 163       <td class="w">Capture only</td>
 164     </tr>
 165
 166     <tr>
 167       <td class="h" id="sq0x4"></td>
 168
 169       <td class="n" id="sq1x4"></td>
 170
 171       <td class="n" id="sq2x4"></td>
 172
 173       <td class="n" id="sq3x4"></td>
 174
 175       <td class="n" id="sq4x4"></td>
 176
 177       <td class="n" id="sq5x4"></td>
 178
 179       <td class="n" id="sq6x4"></td>
 180
 181       <td class="n" id="sq7x4"></td>
 182
 183       <td class="n" id="sq8x4"></td>
 184
 185       <td class="h" id="sq9x4"></td>
 186     </tr>
 187
 188     <tr>
 189       <td class="h" id="sq0x3"></td>
 190
 191       <td class="n" id="sq1x3" onmousedown="down_click(1,3)"
 192       onmouseup="up_click()"><img src="sym/BlackPawn.png"></td>
 193
 194       <td class="n" id="sq2x3" onmousedown="down_click(2,3)"
 195       onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
 196
 197       <td class="n" id="sq3x3" onmousedown="down_click(3,3)"
 198       onmouseup="up_click()"><img src="sym/WhiteRook.png"></td>
 199
 200       <td class="n" id="sq4x3" onmousedown="down_click(4,3)"
 201       onmouseup="up_click()"><img src="sym/WhiteKnight.png"></td>
 202
 203       <td class="n" id="sq5x3" onmousedown="down_click(5,3)"
 204       onmouseup="up_click()"><img src="sym/WhiteQueen.png"></td>
 205
 206       <td class="n" id="sq6x3" onmousedown="down_click(6,3)"
 207       onmouseup="up_click()"><img src="sym/WhiteBishop.png"></td>
 208
 209       <td class="n" id="sq7x3" onmousedown="down_click(7,3)"
 210       onmouseup="up_click()"><img src="sym/WhiteKing.png"></td>
 211
 212       <td class="n" id="sq8x3"></td>
 213
 214       <td class="h" id="sq9x3"></td>
 215     </tr>
 216
 217     <tr>
 218       <td class="h" id="sq0x2"></td>
 219
 220       <td class="n" id="sq1x2"></td>
 221
 222       <td class="n" id="sq2x2"></td>
 223
 224       <td class="n" id="sq3x2"></td>
 225
 226       <td class="n" id="sq4x2"></td>
 227
 228       <td class="n" id="sq5x2"></td>
 229
 230       <td class="n" id="sq6x2"></td>
 231
 232       <td class="n" id="sq7x2"></td>
 233
 234       <td class="n" id="sq8x2"></td>
 235
 236       <td class="h" id="sq9x2"></td>
 237     </tr>
 238
 239     <tr>
 240       <td class="h" id="sq0x1"></td>
 241
 242       <td class="n" id="sq1x1"></td>
 243
 244       <td class="n" id="sq2x1" onmousedown="down_click(-2,1)"
 245       onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
 246
 247       <td class="n" id="sq3x1"></td>
 248
 249       <td class="n" id="sq4x1"></td>
 250
 251       <td class="n" id="sq5x1"></td>
 252
 253       <td class="n" id="sq6x1"></td>
 254
 255       <td class="n" id="sq7x1"></td>
 256
 257       <td class="n" id="sq8x1"></td>
 258
 259       <td class="h" id="sq9x1"></td>
 260     </tr>
 261
 262     <tr>
 263       <td class="h" id="sq0x0"></td>
 264
 265       <td class="n" id="sq1x0"></td>
 266
 267       <td class="n" id="sq2x0"></td>
 268
 269       <td class="n" id="sq3x0"></td>
 270
 271       <td class="n" id="sq4x0"></td>
 272
 273       <td class="n" id="sq5x0"></td>
 274
 275       <td class="n" id="sq6x0"></td>
 276
 277       <td class="n" id="sq7x0"></td>
 278
 279       <td class="n" id="sq8x0"></td>
 280
 281       <td class="h" id="sq9x0"></td>
 282     </tr>
 283   </table>
 284
 285   <p id="piece" height="20">:<br>
 286   :<br>
 287   :<br>
 288   :</p>
 289
 290   <table cellpadding="5" border="1">
 291     <tr>
 292       <td>Piece</td>
 293
 294       <td>ID</td>
 295
 296       <td>value</td>
 297
 298       <td>Moves (<a href="Betza.html">Betza notation</a>)</td>
 299
 300       <td>Remarks</td>
 301     </tr>
 302
 303     <tr>
 304       <td>King</td>
 305
 306       <td>K</td>
 307
 308       <td>-</td>
 309
 310       <td>oK</td>
 311
 312       <td>Can castle with Rook, moving 2 steps towards it</td>
 313     </tr>
 314
 315     <tr>
 316       <td>Queen</td>
 317
 318       <td>Q</td>
 319
 320       <td>11</td>
 321
 322       <td>oRoB or oQ</td>
 323
 324       <td></td>
 325     </tr>
 326
 327     <tr>
 328       <td>Rook</td>
 329
 330       <td>R</td>
 331
 332       <td>5</td>
 333
 334       <td>oR</td>
 335
 336       <td></td>
 337     </tr>
 338
 339     <tr>
 340       <td>Bishop</td>
 341
 342       <td>B</td>
 343
 344       <td>4</td>
 345
 346       <td>oB</td>
 347
 348       <td>Color-bound</td>
 349     </tr>
 350
 351     <tr>
 352       <td>Knight</td>
 353
 354       <td>N</td>
 355
 356       <td>3.25</td>
 357
 358       <td>oN</td>
 359
 360       <td></td>
 361     </tr>
 362
 363     <tr>
 364       <td>Pawn</td>
 365
 366       <td>P</td>
 367
 368       <td>1</td>
 369
 370       <td>mfWcfoF</td>
 371
 372       <td>Promotes to Q, R, B, or N on reaching last rank</td>
 373     </tr>
 374   </table>
 375
 376   <h3>Pawn peculiarities</h3>
 377
 378   <ul>
 379     <li>Pawns capture differently from how they move (straight
 380     move, diagonal capture).</li>
 381
 382     <li>Pawns can move two squares straight ahead from their
 383     initial position, provided they are not blocked.</li>
 384
 385     <li>On the move immediately after such a double push, they can
 386     be captured en passant by another Pawn, as if they had only
 387     moved 1 square ahead.</li>
 388
 389     <li>Pawns promote to another (non-royal) piece of choice when
 390     they reach last rank.</li>
 391   </ul>
 392
 393   <h3>Castling</h3>
 394
 395   <p>A King that has not moved before can move two squares in the
 396   direction of a Rook that has not moved before, in which case that
 397   Rook is moved to the square the King skipped over. This is only
 398   allowed if all squares between King and Rook are empty, when the
 399   King is not in check on the square it came from, and would not be
 400   in check on any of the squares it skipped over.</p>
 401
 402   <h3>General rules</h3>
 403
 404   <ul>
 405     <li><b>The board wraps around like a cylinder, the h-file
 406     connecting to the a-file</b>.</li>
 407
 408     <li>It is not allowed to expose your King to check.</li>
 409
 410     <li>The game is won by checkmating the opponent's King.</li>
 411
 412     <li>Stalemate (no legal moves, but not in check) is a
 413     draw.</li>
 414   </ul>
 415
 416   <h3>XBoard interface issues</h3>
 417
 418   <p>Cylinder Chess must be played with legality testing off, as
 419   XBoard does not understand the wrapping of the board.</p>
 420
 421   <h3>Differences with FIDE</h3>
 422
 423   <p>The board wraps around as a cylinder.</p>
 424
 425   <h3>Strategy issues</h3>
 426
 427   <p>It is not possible to force checkmate on a bare King with just
 428   a single <b>Rook</b>,Bishop or Knight (in addition to your own
 429   King). Two Knights and Bishops in any combination cannot do that
 430   either. (Because the board has no corners, forcing checkmate has
 431   become much more difficult.)</p>
 432
 433   <p>Bishops are confined to squares of a single color. Having
 434   Bishops on both colors compensates this weakness, and is worth an
 435   extra 0.5 on top of their added value.</p>
 436
 437   <p>The Rook and Knight hardly benefit from the cylinder board.
 438   The Bishop, whose moves normally often end on the left or right
 439   board edge, does benefit some, and a Queen gets very
 440   dangerous.</p>
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