p.boxed
	| Pawns advance diagonally and capture by moving forward.

h3 Specifications

ul
	li Chessboard: standard.
	li Material: standard.
	li Non-capturing moves: different pawn moves.
	li Special moves: standard (different en-passant).
	li Captures: standard (except pawns).
	li End of game: standard.

h3 Basics

p.
	Only the pawn movements change, but since there are many on the board it's a
	consequent change. They move forward diagonally instead of moving straight,
	and capture by advancing to the next square vertically.

figure.diagram-container
	.diagram
		| fen:8/8/5p2/5P2/P7/8/5P2/8 b5,e3,d4,g3,h4,e6,f6,g6:
	figcaption Possible pawn moves

p.
	The initial 2-squares jump is allowed, as well as en-passant captures:
	after 1.d2b4 on the diagram, 1...Pxc3 e.p. is possible.

p.
	About notation: since pawn captures are non-ambigous they writes e.g.
	"Pxe6" ('P' is redundant but looks nicer); simple pawn moves are often
	ambiguous, so they write for example "f2g3" (again, the starting row is
	redundant but this also looks better).

figure.diagram-container
	.diagram
		| fen:rnbqkbnr/p1pppppp/8/8/1Pp2P2/5N2/PPP1PPP1/R1BQKBNR c3:
	figcaption.
		After 1.Nf3 b7d5 2.h2f4 d5c4 3.d2b4, en-passant capture on marked square
		is possible

h3 Other source

p
	| See for example the 
	a(href="https://brainking.com/en/GameRules?tp=59") Berolina chess
	|  page on brainking.com.