View source for Pawn Blackhole Chess

== Movement ==

Pawns move forward on the diagonal (two for opening), and always move towards the center according to the quadrant they are in. As they cross into an enemy quadrant, their "forward" diagonal alters to continue their march to the center. Pawns are also colour-locked except when they attack, which is now on traditional grid, and valid in all FOUR directions. This is the only way a pawn can move away from the center. A pawn that reaches ANY edge of an opponents quadrant (14 total target squares in two player) may be promoted. Note that it has to battle every outward step of the way to earn it! Each player has two pawns which can theoretically be promoted in as little as two moves (pawns on the players own edge, taking sideways twice towards the enemy). Other pawns have a longer fastest-theoretical path to promotion, depending on their starting position.

Knights still move "forward two and across one" but now along the diagonal, meaning each knight is now colour-locked, and can move much further - three moves from corner to corner (five in traditional chess). I note that "forward two and one across" on the diagonal is equivalent to an on-grid move of "three and one" (compared to regular chess being "two and one"). Within the chess variants community, pieces that move this way are known as "camels".

Royalty, rooks and bishops move as per traditional chess

There is no castling or en passant move.