3 <title>Crazyhouse</title>
4 <link rel=StyleSheet href="./moves.css" type="text/css">
5 <script type="text/javascript" src="spartan.js"></script>
8 <table cellpadding="20"><tr><td>
11 <h3>Initial setup</h3>
19 c1, c8, f1, f8: Bishop
21 b1, b8, g1, g8: Knight
27 <h3>Moves at a Glance</h3>
29 <p>Click on a piece below to see its moves</p>
31 <table class="board"><tr><td class="h" id="0x9">
33 </td><td class="n" id="1x9" onmouseDown="down_click(1,-9)" onmouseUp="up_click()">
34 <img src="sym/BlackRook.png">
35 </td><td class="n" id="2x9">
37 </td><td class="n" id="3x9">
39 </td><td class="n" id="4x9">
41 </td><td class="n" id="5x9" onmouseDown="down_click(5,9)" onmouseUp="up_click()">
42 <img src="sym/BlackKing.png">
43 </td><td class="n" id="6x9">
45 </td><td class="n" id="7x9">
47 </td><td class="n" id="8x9" onmouseDown="down_click(8,9)" onmouseUp="up_click()">
48 <img src="sym/BlackRook.png">
49 </td><td class="h" id="9x9">
52 <img src="sym/yellow.png">
53 </td><td class="w" rowspan="2" valign="top">
54 <p>Sliding capture or non-capture,<br>can be blocked on any square along the ray</p>
55 </td></tr><tr><td class="h" id="0x8">
57 </td><td class="n" id="1x8">
59 </td><td class="n" id="2x8">
61 </td><td class="n" id="3x8">
63 </td><td class="n" id="4x8">
65 </td><td class="n" id="5x8">
67 </td><td class="n" id="6x8">
69 </td><td class="n" id="7x8">
71 </td><td class="n" id="8x8">
73 </td><td class="h" id="9x8">
75 </td></tr><tr><td class="h" id="0x7">
77 </td><td class="n" id="1x7">
79 </td><td class="n" id="2x7">
81 </td><td class="n" id="3x7">
83 </td><td class="n" id="4x7">
85 </td><td class="n" id="5x7">
87 </td><td class="n" id="6x7">
89 </td><td class="n" id="7x7">
91 </td><td class="n" id="8x7">
93 </td><td class="h" id="9x7">
96 <img src="sym/orange.png">
98 Unblockable leap (capture or non-capture)
99 </td></tr><tr><td class="h" id="0x6">
101 </td><td class="n" id="1x6">
103 </td><td class="n" id="2x6">
105 </td><td class="n" id="3x6">
107 </td><td class="n" id="4x6">
109 </td><td class="n" id="5x6">
111 </td><td class="n" id="6x6">
113 </td><td class="n" id="7x6">
115 </td><td class="n" id="8x6">
117 </td><td class="h" id="9x6">
120 <img src="sym/green.png">
123 </td></tr><tr><td class="h" id="0x5">
125 </td><td class="n" id="1x5">
127 </td><td class="n" id="2x5">
129 </td><td class="n" id="3x5">
131 </td><td class="n" id="4x5">
133 </td><td class="n" id="5x5">
135 </td><td class="n" id="6x5">
137 </td><td class="n" id="7x5">
139 </td><td class="n" id="8x5">
141 </td><td class="h" id="9x5">
144 <img src="sym/red.png">
147 </td></tr><tr><td class="h" id="0x4">
149 </td><td class="n" id="1x4">
151 </td><td class="n" id="2x4">
153 </td><td class="n" id="3x4">
155 </td><td class="n" id="4x4">
157 </td><td class="n" id="5x4">
159 </td><td class="n" id="6x4">
161 </td><td class="n" id="7x4">
163 </td><td class="n" id="8x4">
165 </td><td class="h" id="9x4">
167 </td></tr><tr><td class="h" id="0x3">
169 </td><td class="n" id="1x3" onmouseDown="down_click(1,3)" onmouseUp="up_click()">
170 <img src="sym/BlackPawn.png">
171 </td><td class="n" id="2x3" onmouseDown="down_click(2,3)" onmouseUp="up_click()">
172 <img src="sym/WhitePawn.png">
173 </td><td class="n" id="3x3" onmouseDown="down_click(3,3)" onmouseUp="up_click()">
174 <img src="sym/WhiteRook.png">
175 </td><td class="n" id="4x3" onmouseDown="down_click(4,3)" onmouseUp="up_click()">
176 <img src="sym/WhiteKnight.png">
177 </td><td class="n" id="5x3" onmouseDown="down_click(5,3)" onmouseUp="up_click()">
178 <img src="sym/WhiteQueen.png">
179 </td><td class="n" id="6x3" onmouseDown="down_click(6,3)" onmouseUp="up_click()">
180 <img src="sym/WhiteBishop.png">
181 </td><td class="n" id="7x3" onmouseDown="down_click(7,3)" onmouseUp="up_click()">
182 <img src="sym/WhiteKing.png">
183 </td><td class="n" id="8x3">
185 </td><td class="h" id="9x3">
187 </td></tr><tr><td class="h" id="0x2">
189 </td><td class="n" id="1x2">
191 </td><td class="n" id="2x2">
193 </td><td class="n" id="3x2">
195 </td><td class="n" id="4x2">
197 </td><td class="n" id="5x2">
199 </td><td class="n" id="6x2">
201 </td><td class="n" id="7x2">
203 </td><td class="n" id="8x2">
205 </td><td class="h" id="9x2">
207 </td></tr><tr><td class="h" id="0x1">
209 </td><td class="n" id="1x1">
211 </td><td class="n" id="2x1" onmouseDown="down_click(-2,1)" onmouseUp="up_click()">
212 <img src="sym/WhitePawn.png">
213 </td><td class="n" id="3x1">
215 </td><td class="n" id="4x1">
217 </td><td class="n" id="5x1">
219 </td><td class="n" id="6x1">
221 </td><td class="n" id="7x1">
223 </td><td class="n" id="8x1">
225 </td><td class="h" id="9x1">
227 </td></tr><tr><td class="h" id="0x0">
229 </td><td class="n" id="1x0">
231 </td><td class="n" id="2x0">
233 </td><td class="n" id="3x0">
235 </td><td class="n" id="4x0">
237 </td><td class="n" id="5x0">
239 </td><td class="n" id="6x0">
241 </td><td class="n" id="7x0">
243 </td><td class="n" id="8x0">
245 </td><td class="h" id="9x0">
249 <p id="piece" height="20">:<br>:<br>:<br>:</p>
251 <table cellpadding="5" border="1"><tr><td>
258 Moves (<a href="Betza.html">Betza notation</a>)
270 Can castle with Rook, moving 2 steps towards it
320 Promotes to Q, R, B, or N on reaching last rank
322 <h3>Pawn peculiarities</h3>
324 <li>Pawns capture differently from how they move (straight move, diagonal capture).</li>
325 <li>Pawns can move two squares straight ahead from their initial position, provided they are not blocked.</li>
326 <li>On the move immediately after such a double push, they can be captured en passant by another Pawn,
327 as if they had only moved 1 square ahead.</li>
328 <li>Pawns promote to another (non-royal) piece of choice when they reach last rank.</li>
332 A King that has not moved before can move two squares in the direction of a Rook that has not moved before,
333 in which case that Rook is moved to the square the King skipped over.
334 This is only allowed if all squares between King and Rook are empty,
335 when the King is not in check on the square it came from,
336 and would not be in check on any of the squares it skipped over.
338 <h3>General rules</h3>
340 <li>It is not allowed to expose your King to check.</li>
341 <li>The game is won by checkmating the opponent's King.</li>
342 <li>Stalemate (no legal moves, but not in check) is a draw.</li>
343 <b><li>Pieces captured change color, and are kept in hand by the side who captured them.
344 In stead of a normal move, such pieces can be dropped at any later time.</li>
345 <li>Pawns can not be dropped on first or last rank.</li>
346 <li>Pieces obtained by promotion revert to Pawns on capture.</li>
349 <h3>XBoard interface issues</h3>
351 Pieces obtained by promotions are indicated by slightly modified versions of the conventional piece symbols.
352 (E.g. the Rook has a pointy roof, the Knight a blind-fold, etc.)
353 If you don't want that, start XBoard with the option <b>-disguisePromoted true</b>.
354 You can drop pieces by dragging them onto the board from the holdings displayed beside the board.
356 <h3>Differences with FIDE</h3>
358 Captured pieces can later be dropped to augment the army of their capturer.
360 <h3>Strategy issues</h3>
362 Because pieces are dropped back, there will not be a traditional end-game.
363 Trading material does not constitute progress towards winning, even when you are ahead.
366 Because pieces obtained through promotion revert to Pawns on capture,
367 they are really different piece types from the primordial pieces that move the same.
368 They are in fact more valuable: it is much better to lose a Queen that gives the opponent a Pawn in hand,
369 than to lose a Queen that gives him a Queen in hand.