Chess Puzzle: Difficult For Humans, Impossible For Computers

This great endgame study (1933) was composed by 3 renowned chess composers; A. Kazancev, M. Liburkin, L. Staroverov and the task is to win with the white pieces! I have to tell you that the puzzle is very complex and even chess engines fail to solve because they unable to understand chess fortresses and that’s why their evaluation goes wrong!
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A. Kazancev, M. Liburkin and L. Staroverov
White to win
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This position in Forsyth-Edwards Notation (FEN) is : 8/8/8/1P1K3b/6p1/5pP1/5P1B/7k w – – 0 0
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