◇ Just read — no move neededAim for the hole
士象全 holds against most small forces — but knock out one elephant and the arithmetic collapses: 单缺象 is a fortress with a hole in it. The horse is the piece that plays through a hole, and the pawn is the piece that keeps the defenders pinned while the horse digs. Here the a-side corner is the hole; the winning plan walks the horse toward the palace on that wing, with the pawn always one step behind, escorting.