24. ♗a7 Interposing!
1. h6⁉ Giving black an inconvenient choice by getting an outpost for the rook on f6 or a target on h7. 1... g6 ( 1... ♖xf2 probably gives little more resistance.) 2. ♖f6! White can double rooks and force black to take on f6. Afterward he can increase the pressure with Ne5 or f7 and Nf6 and it's difficult to see how Black will stop the passed f-pawn or avoid losing material.
1. ♗d4+ leads to same position.
24. b4! Creating tension with two aims: conquering the open file and entering the 7th rank.
26. ♖c5 White must choose correctly how to use the outpost. Black can't take, because it gives White two strong pawns!
IM Jop Delemarre (www.schaaktrainer.nl) shows you everything you need to know about open files. Classic examples, tips & tricks, and exercises to practice your knowledge.
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Learn how to create and make use of open files to finish off your opponent.
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