+If a pawn taken: direction of the capturer, can capture enemy.
+http://www.strategems.net/sections/fairy_defs.html
+Having captured, a unit must immediately, as part of its move, play a non-capturing move, using ONLY the powers of movement of the captured unit from the capture-square. If no such move is available, the capture is illegal. Promotion by capture occurs only when a pawn arrives on the promotion rank as the result of a Take & Make move. Checks are as in normal chess: after the notional capture of the checked King, the checking unit does not move away from the King’s square.