I'm trying to create a retraction puzzle, but I'm not sure whether or not it is sound. I'm not sure where to find resources on how to make a retraction puzzle.
I have two related questions-
1-Is my problem sound? I'm going to leave it here without a solution so it can be figured out whether or not it is sound. Remember to consider what Black's move was.
2-Where can I find resources on how to make a retraction puzzles?
I wish for feedback so I may better my creations of retraction puzzles.
White Retracts Their Last Move & Delivers Stalemate Instead
[FEN "8/3R2Kp/4kP1P/3R3P/3B2BP/6NP/P1P4P/8 w - - 0 1"]