Grivas Chess Lab – The Principle of the Two Weaknesses + PGN September 24, 2025
Original price was: $ 30.$ 4Current price is: $ 4.
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| Category | Modern Chess, PREMIUM CHESS VIDEO |
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Modern Chess presents the second installment in the Grivas Chess Lab series: The Principle of Two Weaknesses. Following his definitive work on Endgames with Opposite-Colored Bishops, GM Efstratios Grivas provides a systematic examination of chess’s most reliable winning principle through 68 carefully selected and extensively annotated games.
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Grivas Chess Lab - The Principle of the Two Weaknesses + PGN September 24, 2025
Original price was: $ 30.$ 4Current price is: $ 4.









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