I played Fake Chess today, and my opponent and I were puzzled by one thing. The rulebook says "The final piece you capture must be a pawn. " Why is this? It would make more sense to say "the final piece you move must be a pawn", since the checkmate move is always a non-capturing pawn move.
Thanks for the question! Two part response:
1 - The rule about the last piece captured is directly connected to the checkmate move. If a player captures all of their opponent’s pawns, they make it impossible for their opponent to checkmate. Keeping one pawn on the table means that there’s always a chance.
2 - Since you can win the game by capturing all of your opponent’s pieces, your final move of the game could be made with any of pieces (as you capture your opponent’s final pawn).
Hope that makes sense!