Today’s position is a toughie. In fact, it took grandmaster play over 70 years to come up with the right solution. It is White to play his 14th move. It’s a long attacking line, so you need a plan.

The game is an Ivanchuk win, but the move had been discovered ten years before: 14.Bxf7+ Kxf7 14...Kh7 15.Qxd8 Rxd8 A dreary alternative is 16.Bg5 and White scored 100% in four games.

15.Qb3+ Ke8 16.Re1+ Be7 17.Bf4! Other moves win, but this is the most precise as it threatens the idea of Nb5–c7 and allows the queen rook to join in the attack. 17...Rf7 17...Nc6 18.Nb5+–; 17...Na6 18.Nb5+–

18.Nb5 Kf8 19.Nc7 Qc8 19...Kg8 20.Rad1 Qc8 21.Rxe7+– 20.Ne6+ Ke8 21.Ng5 Rf8 22.Rxe7+! Kxe7 23.Qb4+ Black Resigned

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