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diff --git a/client/client_OLD/views/rules/Checkered/en.pug b/client/client_OLD/views/rules/Checkered/en.pug
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+p.boxed
+	| The capture of an enemy piece produces a new "checkered" piece belonging
+	| to both players.
+
+figure.showPieces.center-align
+	img(src="/images/tmp_checkered/cp.png")
+	img(src="/images/tmp_checkered/cr.png")
+	img(src="/images/tmp_checkered/cn.png")
+	img(src="/images/tmp_checkered/cb.png")
+	img(src="/images/tmp_checkered/cq.png")
+	img(src="/images/tmp_checkered/no_ck.png")
+	figcaption Checkered pieces, born after captures.
+
+p Note: the initial French name for this variant is "l'Échiqueté".
+
+h3 Specifications
+
+ul
+	li Chessboard: standard.
+	li Material: additional checkered pieces.
+	li Non-capturing moves: standard; see below.
+	li Special moves: standard; see below.
+	li Captures: standard; see below.
+	li End of game: standard.
+
+p The game potentially evolves in two stages.
+
+h2.stageDelimiter Stage 1
+
+h3 Basics
+
+ol
+	li
+		| Each capture produces a new piece, taking on nature of
+		| the capturing or captured one.
+	li
+		| The new piece arising from a capture has a new color:
+		| "checkered", as illustrated above.
+	li
+		| All checkered pieces belong to the player in turn and can
+		| capture the opponents pieces.
+
+p Remarks:
+ul
+	li.
+		A non-capturing checkered move cannot be "undone" right after since
+		this would repeat the same position.
+	li Checkered pieces cannot be captured.
+
+figure.diagram-container
+	.diagram
+		| fen:2kr4/pp6/2p5/4ss1r/1P2ns1P/2Np4/P1P1P1BP/R2o1RK1:
+	figcaption.
+		Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
+		because piece's nature changed.
+
+h3 Pions
+
+ul
+	li.
+		Pawns can jump two squares only from their initial rank, and only once in the game:
+		a checkered pawn returning on the pawns' start rank cannot jump. However:
+	li.
+		A pawn captured on its starting square (thus becoming "checkered") keeps the
+		right to advance two squares.
+	li.
+		Checkered pawns cannot capture en passant, because while the pawn was "passing"
+		they were of the same color.
+
+p.bold.bigfont If you wanna play, you can stop reading here.
+
+h3 Stalemate or checkmate?
+
+p.
+	The following diagram seems to show a mating pattern, but the king if
+	"attacked" by a checkered pawn – which still belongs to white.
+	Therefore, it can be considered that it's not really a check because
+	white is unable to "give back the turn".
+	Without the black bishop on a7 it would be mate (without debate), because
+	the king could virtually go to g1 before being captured by the pawn-chamaleon.
+
+figure.diagram-container
+	.diagram
+		| fen:7k/b5pp/8/8/8/8/6ss/7K:
+	figcaption After 1...g2+(#?)
+
+p.
+	The interface considers that it's mate in both cases, following the idea
+	"it's checkmate if we cannot move, and the opponent on its turn could
+	take the king" (maybe after an impossible move).
+
+h2.stageDelimiter Stage 2
+
+p.warn This stage is not (and probably will never be) implemented.
+
+p.
+	During the game one of the two players can decide to take control of the
+	checkered pieces.
+	They thus become autonomous and vulnerable to being captured - stage 2 begins.
+	The other player is in charge of both the white and black pieces, and tries to
+	eliminate checkered pieces.
+	The checkered side wins by checkmating either the white or black king.
+
+h4 Variant of stage 2
+p.
+	An observer could decide to join the game by taking the checkered pieces
+	at any moment.
+	It then becomes a chess game with three players, with some subtelties to be resolved.
+	It was tested in some (real life) games organised by the variant creator.
+
+h3 Special moves
+
+p Checkered pawns can...
+ul
+	li move and capture in either direction;
+	li take en passant,
+	li be promoted on either the first or eighth row.
+
+h3 Credits
+
+ul
+	li.
+		The rules of Checkered Chess were thought up by Patrick Bernier and developed
+		with the help of Benjamin Auder.
+	li.
+		Thanks also to Olive Martin, Christian Poisson, Bevis Martin, Laurent Nouhaud
+		and Frédéric Fradet.