3 <title>Berolina Chess</title>
4 <link rel=StyleSheet href="./moves.css" type="text/css">
5 <script type="text/javascript" src="spartan.js"></script>
8 <h1>Berolina Chess</h1>
9 <table cellpadding="20"><tr><td>
12 <h3>Initial setup</h3>
20 c1, c8, f1, f8: Bishop
22 b1, b8, g1, g8: Knight
24 a2-h2, a7-h7: Berolina Pawns
28 <h3>Moves at a Glance</h3>
30 <p>Click on a piece below to see its moves</p>
32 <table class="board"><tr><td class="h" id="0x9">
34 </td><td class="n" id="1x9" onmouseDown="down_click(1,-9)" onmouseUp="up_click()">
35 <img src="sym/BlackRook.png">
36 </td><td class="n" id="2x9">
38 </td><td class="n" id="3x9">
40 </td><td class="n" id="4x9">
42 </td><td class="n" id="5x9" onmouseDown="down_click(5,9)" onmouseUp="up_click()">
43 <img src="sym/BlackKing.png">
44 </td><td class="n" id="6x9">
46 </td><td class="n" id="7x9">
48 </td><td class="n" id="8x9" onmouseDown="down_click(8,9)" onmouseUp="up_click()">
49 <img src="sym/BlackRook.png">
50 </td><td class="h" id="9x9">
53 <img src="sym/yellow.png">
54 </td><td class="w" rowspan="2" valign="top">
55 <p>Sliding capture or non-capture,<br>can be blocked on any square along the ray</p>
56 </td></tr><tr><td class="h" id="0x8">
58 </td><td class="n" id="1x8">
60 </td><td class="n" id="2x8" onmouseDown="down_click(2,0)" onmouseUp="up_click()">
62 </td><td class="n" id="3x8">
64 </td><td class="n" id="4x8" onmouseDown="down_click(4,8)" onmouseUp="up_click()">
65 <img src="sym/BlackPawn.png">
66 </td><td class="n" id="5x8">
68 </td><td class="n" id="6x8">
70 </td><td class="n" id="7x8">
72 </td><td class="n" id="8x8">
74 </td><td class="h" id="9x8">
76 </td></tr><tr><td class="h" id="0x7">
78 </td><td class="n" id="1x7">
80 </td><td class="n" id="2x7">
82 </td><td class="n" id="3x7">
84 </td><td class="n" id="4x7">
86 </td><td class="n" id="5x7">
88 </td><td class="n" id="6x7">
90 </td><td class="n" id="7x7">
92 </td><td class="n" id="8x7">
94 </td><td class="h" id="9x7">
97 <img src="sym/orange.png">
99 Unblockable leap (capture or non-capture)
100 </td></tr><tr><td class="h" id="0x6">
102 </td><td class="n" id="1x6">
103 <img src="sym/WhitePawn.png">
104 </td><td class="n" id="2x6" onmouseDown="down_click(2,6)" onmouseUp="up_click()">
105 <img src="sym/BlackPawn.png">
106 </td><td class="n" id="3x6" onmouseDown="down_click(3,-6)" onmouseUp="up_click()">
107 <img src="sym/WhitePawn.png">
108 </td><td class="n" id="4x6">
110 </td><td class="n" id="5x6">
112 </td><td class="n" id="6x6">
114 </td><td class="n" id="7x6">
116 </td><td class="n" id="8x6">
118 </td><td class="h" id="9x6">
121 <img src="sym/green.png">
124 </td></tr><tr><td class="h" id="0x5">
126 </td><td class="n" id="1x5">
128 </td><td class="n" id="2x5">
130 </td><td class="n" id="3x5">
132 </td><td class="n" id="4x5">
134 </td><td class="n" id="5x5">
136 </td><td class="n" id="6x5">
138 </td><td class="n" id="7x5">
140 </td><td class="n" id="8x5">
142 </td><td class="h" id="9x5">
145 <img src="sym/red.png">
148 </td></tr><tr><td class="h" id="0x4">
150 </td><td class="n" id="1x4">
152 </td><td class="n" id="2x4">
154 </td><td class="n" id="3x4">
156 </td><td class="n" id="4x4">
158 </td><td class="n" id="5x4">
160 </td><td class="n" id="6x4">
162 </td><td class="n" id="7x4">
164 </td><td class="n" id="8x4">
166 </td><td class="h" id="9x4">
168 </td></tr><tr><td class="h" id="0x3">
170 </td><td class="n" id="1x3">
172 </td><td class="n" id="2x3">
174 </td><td class="n" id="3x3" onmouseDown="down_click(3,3)" onmouseUp="up_click()">
175 <img src="sym/WhiteRook.png">
176 </td><td class="n" id="4x3" onmouseDown="down_click(4,3)" onmouseUp="up_click()">
177 <img src="sym/WhiteKnight.png">
178 </td><td class="n" id="5x3" onmouseDown="down_click(5,3)" onmouseUp="up_click()">
179 <img src="sym/WhiteQueen.png">
180 </td><td class="n" id="6x3" onmouseDown="down_click(6,3)" onmouseUp="up_click()">
181 <img src="sym/WhiteBishop.png">
182 </td><td class="n" id="7x3" onmouseDown="down_click(7,3)" onmouseUp="up_click()">
183 <img src="sym/WhiteKing.png">
184 </td><td class="n" id="8x3">
186 </td><td class="h" id="9x3">
188 </td></tr><tr><td class="h" id="0x2">
190 </td><td class="n" id="1x2">
192 </td><td class="n" id="2x2">
194 </td><td class="n" id="3x2">
196 </td><td class="n" id="4x2">
198 </td><td class="n" id="5x2">
200 </td><td class="n" id="6x2">
202 </td><td class="n" id="7x2">
204 </td><td class="n" id="8x2">
206 </td><td class="h" id="9x2">
208 </td></tr><tr><td class="h" id="0x1">
210 </td><td class="n" id="1x1">
212 </td><td class="n" id="2x1">
214 </td><td class="n" id="3x1">
216 </td><td class="n" id="4x1">
218 </td><td class="n" id="5x1">
220 </td><td class="n" id="6x1">
222 </td><td class="n" id="7x1">
224 </td><td class="n" id="8x1">
226 </td><td class="h" id="9x1">
228 </td></tr><tr><td class="h" id="0x0">
230 </td><td class="n" id="1x0">
232 </td><td class="n" id="2x0">
234 </td><td class="n" id="3x0">
236 </td><td class="n" id="4x0">
238 </td><td class="n" id="5x0">
240 </td><td class="n" id="6x0">
242 </td><td class="n" id="7x0">
244 </td><td class="n" id="8x0">
246 </td><td class="h" id="9x0">
250 <p id="piece" height="20">:<br>:<br>:<br>:</p>
252 <table cellpadding="5" border="1"><tr><td>
259 Moves (<a href="Betza.html">Betza notation</a>)
271 Can castle with Rook, moving 2 steps towards it
321 Promotes to Q, R, B, or N on reaching last rank
323 <h3>Pawn peculiarities</h3>
325 <li>Pawns capture differently from how they move (diagonal move, straight capture).</li>
326 <li>Pawns can move two squares <i>diagonally</i> ahead from their initial position, provided they are not blocked.</li>
327 <li>On the move immediately after such a double push, they can be captured en passant by another Pawn,
328 as if they had only moved 1 square ahead.</li>
329 <li>A diagonal move to the square skipped by the previous Pawn move is thus <b>not</b> an e.p. capture.</li>
330 <li>Pawns promote to another (non-royal) piece of choice when they reach last rank.</li>
334 A King that has not moved before can move two squares in the direction of a Rook that has not moved before,
335 in which case that Rook is moved to the square the King skipped over.
336 This is only allowed if all squares between King and Rook are empty,
337 when the King is not in check on the square it came from,
338 and would not be in check on any of the squares it skipped over.
340 <h3>General rules</h3>
342 <li>It is not allowed to expose your King to check.</li>
343 <li>The game is won by checkmating the opponent's King.</li>
344 <li>Stalemate (no legal moves, but not in check) is a draw.</li>
346 <h3>Differences with FIDE</h3>
348 The capture and non-capture move of the Pawns have been swapped. As a result the initial double-push is also diagonal.
350 <h3>Strategy issues</h3>
352 It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King).
353 Two Knights cannot do that either.
356 Bishops are confined to squares of a single color.
357 Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value.