Commit | Line | Data |
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dbcc32e9 | 1 | p.boxed |
7dc18cbe | 2 | | Move twice at every turn. |
dbcc32e9 | 3 | |
dbcc32e9 | 4 | p. |
7dc18cbe BA |
5 | The only difference with orthodox chess is the double-move rule, |
6 | but this affects the game a lot. | |
dbcc32e9 | 7 | |
dbcc32e9 | 8 | p. |
7dc18cbe BA |
9 | At the very first move of the game, white make only one move - as usual. |
10 | However, after that and for all the game each side must play twice at | |
b406466b | 11 | every turn. The goal is to checkmate. |
69f3d801 | 12 | |
b406466b BA |
13 | figure.diagram-container |
14 | .diagram.diag12 | |
15 | | fen:rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR: | |
16 | .diagram.diag22 | |
17 | | fen:r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5Q2/PPPP1PPP/RNB1K1NR: | |
18 | figcaption. | |
19 | Left: after the moves 1.e4 e5, the 'd' pawn is pinned. | |
20 | Right: the black king is under check. | |
dbcc32e9 | 21 | |
5915f720 | 22 | p. |
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23 | In the diagram position on the left, after the first black move ...e5, |
24 | the 'd' pawn is pinned because moving it would allow 2.Bb5,Bxe8 capturing | |
25 | the king. | |
26 | On the right, after 2.Qf3,Bc4 black king is under check because of | |
27 | the options 3.Bxf7,Bxe8 or 3.Qxf7,Qxe8. | |
dbcc32e9 | 28 | |
69f3d801 BA |
29 | h3 En-passant capture |
30 | ||
31 | p. | |
7dc18cbe BA |
32 | Capturing en-passant is allowed under certain conditions. |
33 | If the opponent moved a pawn allowing such a capture (once or twice), | |
34 | then (to take it) you must capture en-passant at the first move of your turn. | |
35 | After that, if (and only if) there is another en-passant capture available | |
36 | you can play it on the second move. | |
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37 | |
38 | p. | |
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39 | Note: if a pawn 2-squares jump was made and then a piece landed at the |
40 | en-passant square at the second move, a pawn capture on this square | |
41 | takes only the piece. | |
42 | And, if a pawn advanced twice then en-passant capture | |
43 | on its first movement is impossible (the pawn is now "too far"). | |
69f3d801 | 44 | |
dbcc32e9 BA |
45 | h3 More information |
46 | ||
5915f720 | 47 | p |
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48 | | This variant is derived from |
49 | a(href="/variants/Doublemove1") Marseillais chess | |
50 | | . It is also playable | |
51 | a(href="https://greenchess.net/rules.php?v=double-move") on greenchess | |
52 | | . |