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Solution to Puzzle 4. CHESS PUZZLE
White to move, mate in three.
Solution:
1. P-QB4 if 1. ...... any R - R5, 2. P-Q4 any move if 1. ..... any R - R6, 2. P-Q3 any move 3. P-N5 + mate
if 1 ... P-QB4 (black threatening N-Q3 defending QN4) 2. N-Q3 any move 3 N-B5+ mate
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