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Queen versus rook. Always wins against a lone rook, unless there is an immediate draw (perpetual check / stalemate) Long known – great piece of chess history – thought to be an easy win Computers changed that -= difficult win against accurate play. Method.
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Queen versus rook • Always wins against a lone rook, unless there is an immediate draw (perpetual check / stalemate) • Long known – great piece of chess history – thought to be an easy win • Computers changed that -= difficult win against accurate play
Method • Force rook back into a third-rank defence • Reaching the Philidor position from a second rank defence • Winning the rook / forcing mate
Queen versus Rook • Famous position analysed by Philidor(1777) • Win for white, when black to move • How to achieve black to move? • How to win Rook and force a win?
third rank defence • M. Euwe (1958)
Beware – draw via stalemate • D. Ponziani (1782)
Saavedra Position • White to move and win!