are ten instead of Gliński's nine. Other differences from Gliński's: castling is permitted; kings start on opposite wings of the board; and draws are worth half a point. Players may castle either (0-0) or (0-0-0). The king slides two cells when castling short; three cells when castling long. Normal castling rules and restrictions apply. As in algebraic notation, each cell is identified by a letter+number combination. are horizontal and identified by numbers 1–8. are straight and 30° oblique to the vertical, identified by letters a–l. Moves can be recorded in long algebraic notation (LAN) to avoid confusion, for example: 1. d2-f4 rather than . Pawn's move A pawn moves forward to an adjacent cell, or (as its first-move option), two cells forward in the same direction. If an enemy man blocks a pawn from moving in one of its two forward move directions, then that pawn is automatically blocked from moving in the other direction as well. But if the blocking man is a friendly piece the effect is not the same—the pawn is still free to move in the unblocked direction. A pawn captures diagonally forward, to a cell of the same colour on which the pawn stands. But only a pawn on its initial cell may capture straight forward; once a pawn has moved, it may capture only to the sides. (So, unless it is a wing pawn, an unmoved pawn has three capturing possibilities; a pawn that has moved, two.) En passant captures are permitted in Brusky's chess. Endgame studies These endgame studies apply to Brusky's hexagonal variant: McCooey's hexagonal chess In 1978–79 Dave McCooey and Richard Honeycutt developed another variation of hexagonal chess very similar to Gliński's, having four differences: the starting array (including seven pawns per side instead of nine); the pawn's capturing move; pawns on the f-file are not permitted an initial double step; and stalemate is counted as a draw (players receive half a point). Pawn's move This diagram shows the pawn's move in McCooey's variant. The capturing move corresponds to a bishop's move: e.g. if the black pawn on e8 advances to e6, the white pawn on d5 may capture it en passant. In the starting position, the f-file pawns may not advance two steps like the other pawns. The are also not defended in the opening array, and in fact smothered mate would result if it were captured by a knight,