Chessproblem
Z. M. Birnov, 1951.
A real sadistic problem. White to begin.
To see the solution: drag the mouse from here....
Solution:
Allthough the black rook is locked up, black's king can move freely on the white squares
1. Re1! Kc6 2. Rd1 Kb5 3. Rc1 Ka4 4. Rb1 h5+
5. Kg3 Ka3 6. Bc5+ Ka2 7. Rxh1
to here.