It is here the Ivanchuk missed that this move unprotects the bi Carlsen vs Ivanchuk, 2011  (E21) Nimzo-Indian, Three Knights, 34 moves, 1-0 79 ... Kf6-e5?? blocks the Black h2-bishop from b8-promotion sq Carlsen vs Shirov, 2008  (C78) Ruy Lopez, 80 moves, 1-0 28 .. Nf6-d7?? prevents Black c7-queen from playing ... Qc7xNe7 H Melkumyan vs Dreev, 2011  (D52) Queen's Gambit Declined, 30 moves, 1-0