Instead of rook take on a5 should have blocked with bishop on a2. Its a zugswang. If rook take a2 then rh1## and if white blocks the h file with h5 then ra8##
Why not rook take bishop? If pawn take and promote to a queen it's stalemate, if he don't take then you take and you win, if he recapture but promote to a knight you win, and if promote to a rook, you assure the draw
R:b2 a:b2Q stalemate
Oh my god these are brilliant moves
Rxb1 easy, he’s forced to take and stalemate
If the promotion was black bishop or queen its will be mate
Instead of rook take on a5 should have blocked with bishop on a2. Its a zugswang. If rook take a2 then rh1## and if white blocks the h file with h5 then ra8##
Very beautiful puzzle ❤
Why not rook take bishop? If pawn take and promote to a queen it's stalemate, if he don't take then you take and you win, if he recapture but promote to a knight you win, and if promote to a rook, you assure the draw