Solution
83. ♚xc5 ♚xe7 84. ♚b6 ♚d6 85. ♚xb7 c5 86. b5 c4 87. bxa6 c3 88. a7 c2 89. a8=♛
The position
This expert puzzle (rating 2236) asks White to move to find the winning idea. It features these themes: Tactics.
It is White to move. Look for the tactic hiding in the position — Tactics. Drag a piece on the board to play your move; the puzzle will tell you if you found the best continuation.
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