I made a position where both sides can checkmate in one. White can checkmate in 5 or more ways! The black side is harder.
lichess.org/analysis/K2RRrkb/4qpPp/p2PPPP1/Pp1pnNpQ/pPPBbnN1/8/p1B5/1r6_w_KQkq_-
lichess.org/analysis/K2RRrkb/4qpPp/p2PPPP1/Pp1pnNpQ/pPPBbnN1/8/p1B5/1r6_w_KQkq_-