Antichess and horde can end with a side that has no king, so the
result glyph had nothing to sit on. Fall back to the queen, rook,
bishop, knight and pawn, in that order.
A terminal position with no legal moves and no check was always shown
as stalemate, so atomic explosions, antichess, king of the hill,
racing kings and horde wins got the stalemate glyph. Use the chessops
outcome of the position instead, and don't treat a crazyhouse check
that can be blocked by a drop as mate.
dualfroz
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