Puzzle 1 – Friedel – Ni
White to move
White: Joshua Friedel (2547)
Black: Shiqun Ni (2426)
Saint Louis Fall-B
11-09-17
A: Bxh7, Kxh7; 2. Rxd5,
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Puzzle 2 – Aravindh – Vallejo
Black to move
White: Chithambaram Aravindh (2573)
Black: Francisco Vallejo (2716)
Douglas IoM
23-09-17
A: …., Nd5!; 2. exd5, e4+; 3. Kg2, e3
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Puzzle 3 – Boris – Zatonskih
White to move
White: Boris Gelfand (2737)
Black: Anna Zatonskih (2424)
Douglas IoM
28-09-17
A: 1. Nxd5, Qxd5; 2. Qc8+, Kg7; 3. Qxa6
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Puzzle 4 – Vaishali – Pichot
Black to move
White: Babu Vaishali (2329)
Black: Alan Pichot (2565)
Douglas IoM
25-09-17
A: 1. …, a6; 2. Rxa6, Nxd5