Puzzle 18997:
Puzzle 18997:
Sergey Karjakin (2739) - Alexei Shirov (2742)
4th ACP World Rapid Cup Odessa UKR, 2010.05.28 Karjakin - Shirov, Odessa 2010
4th ACP World Rapid Cup Odessa UKR, 2010.05.28 Karjakin - Shirov, Odessa 2010
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