Add unambiguous section in the PGN + some fixes + code formatting and fix typos
[vchess.git] / client / src / translations / rules / Checkered / en.pug
1 p.boxed
2 | The capture of an enemy piece produces a new "checkered" piece belonging
3 | to both players.
4
5 figure.showPieces.text-center
6 img(src="/images/pieces/Checkered/cp.svg")
7 img(src="/images/pieces/Checkered/cr.svg")
8 img(src="/images/pieces/Checkered/cn.svg")
9 img(src="/images/pieces/Checkered/cb.svg")
10 img(src="/images/pieces/Checkered/cq.svg")
11 figcaption Checkered pieces, born after captures.
12
13 p Note: the initial French name for this variant is "l'Échiqueté".
14
15 p The game potentially evolves in two stages.
16
17 h2.stageDelimiter Stage 1
18
19 h3 Basics
20
21 ol
22 li
23 | Each capture produces a new piece, taking on nature of
24 | the capturing or captured one.
25 li
26 | The new piece arising from a capture has a new color:
27 | "checkered", as illustrated above.
28 li
29 | All checkered pieces belong to the player in turn and can
30 | capture the opponents pieces.
31
32 p Remarks:
33 ul
34 li.
35 A non-capturing checkered move cannot be "undone" right after since
36 this would repeat the same position.
37 li Checkered pieces cannot be captured.
38
39 figure.diagram-container
40 .diagram
41 | fen:2kr4/pp6/2p5/4ss1r/1P2ns1P/2Np4/P1P1P1BP/R2o1RK1:
42 figcaption.
43 Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
44 because piece's nature changed.
45
46 h3 Pawns
47
48 ul
49 li.
50 Pawns can jump two squares only from their initial rank, and only once in
51 the game: a checkered pawn returning on the pawns' start rank cannot jump.
52 However:
53 li.
54 A pawn captured on its starting square (thus becoming "checkered") keeps
55 the right to advance two squares.
56 li.
57 Checkered pawns cannot capture en passant, because while the pawn was
58 "passing" they were of the same color.
59
60 p.bold.bigfont If you wanna play, you can stop reading here.
61
62 h3 Stalemate or checkmate?
63
64 p.
65 The following diagram seems to show a mating pattern, but the king if
66 "attacked" by a checkered pawn – which still belongs to white.
67 Therefore, it can be considered that it's not really a check because
68 white is unable to "give back the turn".
69 Without the black bishop on a7 it would be mate (without debate), because
70 the king could virtually go to g1 before being captured by the
71 pawn-chamaleon.
72
73 figure.diagram-container
74 .diagram
75 | fen:7k/b5pp/8/8/8/8/6ss/7K:
76 figcaption After 1...g2+(#?)
77
78 p.
79 The interface considers that it's mate in both cases, following the idea
80 "it's checkmate if we cannot move, and the opponent on its turn could
81 take the king" (maybe after an impossible move).
82
83 h2.stageDelimiter Stage 2
84
85 p.warn This stage is not (and probably will never be) implemented.
86
87 p.
88 During the game one of the two players can decide to take control of the
89 checkered pieces.
90 They thus become autonomous and vulnerable to being captured - stage 2
91 begins. The other player is in charge of both the white and black pieces, and
92 tries to eliminate checkered pieces.
93 The checkered side wins by checkmating either the white or black king.
94
95 h4 Variant of stage 2
96 p.
97 An observer could decide to join the game by taking the checkered pieces
98 at any moment.
99 It then becomes a chess game with three players, with some subtelties to be
100 resolved. It was tested in some (real life) games organised by the variant
101 inventor.
102
103 h3 Special moves
104
105 p Checkered pawns can...
106 ul
107 li move and capture in either direction;
108 li take en passant,
109 li be promoted on either the first or eighth row.
110
111 h3 Credits
112
113 ul
114 li.
115 The rules of Checkered Chess were thought up by Patrick Bernier and
116 developed with the help of Benjamin Auder around 2011-2012.
117 li.
118 Thanks also to Olive Martin, Christian Poisson, Bevis Martin, Laurent
119 Nouhaud and Frédéric Fradet.