X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=views%2Frules%2FUpsidedown%2Fen.pug;fp=views%2Frules%2FUpsidedown%2Fen.pug;h=0000000000000000000000000000000000000000;hb=625022fdcf750f0aff8fcd699f7e9b89730e1d10;hp=8d4fa73beb1458f94ba05379883fffd231940a1e;hpb=b955c65b942d09d24b5c3bed0d755d4f2f8f71f1;p=vchess.git

diff --git a/views/rules/Upsidedown/en.pug b/views/rules/Upsidedown/en.pug
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--- a/views/rules/Upsidedown/en.pug
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-p.boxed
-	| Pawns start on the 7th rank. Move a knight to promote them.
-
-h3 Divergences
-
-p No castle, no en-passant capture.
-
-p.
-	...Only the initial position changes, but this makes a huge difference.
-	In particular, castling would be rather pointless so it's disabled here.
-	En-passant captures are impossible because all pawns already reached 7th rank.
-
-h3 About the initial position
-
-p.
-	Since truly random start can allow a mate in 3 with a knight,
-	the kings have at least one knight neighbor in the initial position.
-	This allows to move free out of potential check from the very beginning.
-
-p.
-	A less constraining condition would be to require the two knights to stand on
-	two squares of different colors, but it's not enough as proved by the
-	following diagram.
-	White can mate in 3: 1.Nc6 followed by Nb4 threatening both a2 and d3.
-
-figure.diagram-container
-	.diagram
-		| fen:RBN1BRRQ/PPPPPPP/8/4n3/8/8/Nppppppp/brkbqr1n:
-	figcaption After 1.Nc6 Nf3 2.Nb4 Ne5 (covers d3 but not a2) 3.Nxa2#
-
-h3 Source
-
-p
-	| See for example the 
-	a(href="https://www.chessvariants.com/diffsetup.dir/upside.html") Upside down chess
-	|  page on chessvariants.com.