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8 <h1>Capablanca Random Chess (CRC)</h1>
9 <table cellpadding="20"><tr><td>
12 <h3>Initial setup</h3>
14 There is no fixed setup;
15 the back-rank pieces are randomly shuffled with certain restrictions.
16 Black's setup is the mirror image of white's, though.
35 The Bishops must start on different colors.
36 The King must start between the Rooks.
37 It has been suggested the Bishops should also not start next to each other.
41 <h3>Moves at a Glance</h3>
43 <p>Click on a piece below to see its moves</p>
45 <table class="board"><tr><td class="n" id="0x9" onmouseDown="down_click(0,-9)" onmouseUp="up_click()">
46 <img src="sym/BlackRook.png">
47 </td><td class="n" id="1x9">
49 </td><td class="n" id="2x9">
51 </td><td class="n" id="3x9">
53 </td><td class="n" id="4x9">
55 </td><td class="n" id="5x9" onmouseDown="down_click(5,-9)" onmouseUp="up_click()">
56 <img src="sym/BlackKing.png">
57 </td><td class="n" id="6x9">
59 </td><td class="n" id="7x9">
61 </td><td class="n" id="8x9">
63 </td><td class="n" id="9x9" onmouseDown="down_click(9,9)" onmouseUp="up_click()">
64 <img src="sym/BlackRook.png">
66 <img src="sym/yellow.png">
67 </td><td class="w" rowspan="2" valign="top">
68 <p>Sliding capture or non-capture,<br>can be blocked on any square along the ray</p>
69 </td></tr><tr><td class="n" id="0x8">
71 </td><td class="n" id="1x8">
73 </td><td class="n" id="2x8" onmouseDown="down_click(2,0)" onmouseUp="up_click()">
75 </td><td class="n" id="3x8">
77 </td><td class="n" id="4x8">
79 </td><td class="n" id="5x8">
81 </td><td class="n" id="6x8">
83 </td><td class="n" id="7x8">
85 </td><td class="n" id="8x8">
87 </td><td class="n" id="9x8">
89 </td></tr><tr><td class="n" id="0x7">
91 </td><td class="n" id="1x7">
93 </td><td class="n" id="2x7">
95 </td><td class="n" id="3x7">
97 </td><td class="n" id="4x7">
99 </td><td class="n" id="5x7">
101 </td><td class="n" id="6x7">
103 </td><td class="n" id="7x7">
105 </td><td class="n" id="8x7">
107 </td><td class="n" id="9x7">
110 <img src="sym/orange.png">
112 Unblockable leap (capture or non-capture)
113 </td></tr><tr><td class="n" id="0x6">
115 </td><td class="n" id="1x6">
117 </td><td class="n" id="2x6">
119 </td><td class="n" id="3x6">
121 </td><td class="n" id="4x6">
123 </td><td class="n" id="5x6" onmouseDown="down_click(5,6)" onmouseUp="up_click()">
124 <img src="sym/WhiteArchbishop.png">
125 </td><td class="n" id="6x6">
127 </td><td class="n" id="7x6">
129 </td><td class="n" id="8x6">
131 </td><td class="n" id="9x6">
134 <img src="sym/green.png">
137 </td></tr><tr><td class="n" id="0x5">
139 </td><td class="n" id="1x5">
141 </td><td class="n" id="2x5">
143 </td><td class="n" id="3x5">
145 </td><td class="n" id="4x5">
147 </td><td class="n" id="5x5">
149 </td><td class="n" id="6x5">
151 </td><td class="n" id="7x5">
153 </td><td class="n" id="8x5">
155 </td><td class="n" id="9x5">
158 <img src="sym/red.png">
161 </td></tr><tr><td class="n" id="0x4">
163 </td><td class="n" id="1x4">
165 </td><td class="n" id="2x4">
167 </td><td class="n" id="3x4">
169 </td><td class="n" id="4x4">
171 </td><td class="n" id="5x4" onmouseDown="down_click(5,4)" onmouseUp="up_click()">
172 <img src="sym/WhiteMarshall.png">
173 </td><td class="n" id="6x4">
175 </td><td class="n" id="7x4">
177 </td><td class="n" id="8x4">
179 </td><td class="n" id="9x4">
181 </td></tr><tr><td class="n" id="0x3">
183 </td><td class="n" id="1x3" onmouseDown="down_click(1,3)" onmouseUp="up_click()">
184 <img src="sym/BlackPawn.png">
185 </td><td class="n" id="2x3" onmouseDown="down_click(2,3)" onmouseUp="up_click()">
186 <img src="sym/WhitePawn.png">
187 </td><td class="n" id="3x3" onmouseDown="down_click(3,3)" onmouseUp="up_click()">
188 <img src="sym/WhiteRook.png">
189 </td><td class="n" id="4x3" onmouseDown="down_click(4,3)" onmouseUp="up_click()">
190 <img src="sym/WhiteKnight.png">
191 </td><td class="n" id="5x3" onmouseDown="down_click(5,3)" onmouseUp="up_click()">
192 <img src="sym/WhiteQueen.png">
193 </td><td class="n" id="6x3" onmouseDown="down_click(6,3)" onmouseUp="up_click()">
194 <img src="sym/WhiteBishop.png">
195 </td><td class="n" id="7x3" onmouseDown="down_click(7,3)" onmouseUp="up_click()">
196 <img src="sym/WhiteKing.png">
197 </td><td class="n" id="8x3">
199 </td><td class="n" id="9x3">
201 </td></tr><tr><td class="n" id="0x2">
203 </td><td class="n" id="1x2">
205 </td><td class="n" id="2x2">
207 </td><td class="n" id="3x2">
209 </td><td class="n" id="4x2">
211 </td><td class="n" id="5x2">
213 </td><td class="n" id="6x2">
215 </td><td class="n" id="7x2">
217 </td><td class="n" id="8x2">
219 </td><td class="n" id="9x2">
221 </td></tr><tr><td class="n" id="0x1">
223 </td><td class="n" id="1x1">
225 </td><td class="n" id="2x1" onmouseDown="down_click(-2,1)" onmouseUp="up_click()">
226 <img src="sym/WhitePawn.png">
227 </td><td class="n" id="3x1">
229 </td><td class="n" id="4x1">
231 </td><td class="n" id="5x1">
233 </td><td class="n" id="6x1">
235 </td><td class="n" id="7x1">
237 </td><td class="n" id="8x1">
239 </td><td class="n" id="9x1">
241 </td></tr><tr><td class="n" id="0x0">
243 </td><td class="n" id="1x0">
245 </td><td class="n" id="2x0">
247 </td><td class="n" id="3x0">
249 </td><td class="n" id="4x0">
251 </td><td class="n" id="5x0">
253 </td><td class="n" id="6x0">
255 </td><td class="n" id="7x0">
257 </td><td class="n" id="8x0">
259 </td><td class="n" id="9x0">
263 <p id="piece" height="20">:<br>:<br>:<br>:</p>
265 <table cellpadding="5" border="1"><tr><td>
272 Moves (<a href="Betza.html">Betza notation</a>)
284 Can castle with Rook, moving 3 steps towards it
354 Promotes to Q, R, B, or N on reaching last rank
356 <h3>Pawn peculiarities</h3>
358 <li>Pawns capture differently from how they move (straight move, diagonal capture).</li>
359 <li>Pawns can move two squares ahead from their initial position, provided they are not blocked.</li>
360 <li>On the move immediately after such a double push, they can be captured en passant by another Pawn,
361 as if they had only moved 1 square ahead.</li>
362 <li>Pawns promote to another (non-royal) piece of choice when they reach last rank.</li>
366 A King that has not moved before can move to the c1/c8 or i1/i8 in the direction of a Rook that has not moved before,
367 in which case that Rook is moved to the square on the other side next to the King.
368 This is only allowed if all squares traveled through by King and Rook are empty (after their removal),
369 when the King is not in check on the square it came from,
370 and would not be in check on any of the squares it skipped over.
372 <h3>General rules</h3>
374 <li>It is not allowed to expose your King to check.</li>
375 <li>The game is won by checkmating the opponent's King.</li>
376 <li>Stalemate (no legal moves, but not in check) is a draw.</li>
379 You can use the New Shuffle dialog to control the randomization of the initial position.
381 <h3>Differences with FIDE</h3>
383 The Chancellor and Archbishop pieces are extra, and the board is expanded to accomodate them.
384 Castling is generalized to allow it with non-standard placement of King and Rooks.
386 <h3>Strategy issues</h3>
388 It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King).
389 Two Knights cannot do that either.
390 The Archbishop can force checkmate against a bare King.
393 Bishops are confined to squares of a single color.
394 Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value.
397 As Chancellor and Queen are nearly equal in value to Queen, under-promotion is very common,
398 and there is virtually never any need to promote to R, B or N.
401 The super-pieces (Q, C, A) devaluate by the presence of lower-valued opponent pieces.
402 As a result trading Q for R + B is in general a good trade when you still have both J,
403 as the latter gain in value by eliminating the opponent's R and B,
404 which is more compensation than the intrinsic value differene between Q and R + B.