38 Nd8! Black e8-queen defends own e6-rook, not d8-square Keres vs A Tarnowski, 1952  (C86) Ruy Lopez, Worrall Attack, 40 moves, 1-0 39 Nf6! Black d4-queen defends own e4-rook, not f6-square Navara vs Svidler, 2006  (D16) Queen's Gambit Declined Slav, 40 moves, 1-0 33 Nf7! Black d5-queen defends own d8-rook, not f7-square Adams vs E Ghaem Maghami, 2006  (C42) Petrov Defense, 34 moves, 1-0 32 ... Nd2! White e2-queen defends own e4-rook, not d2-square I Rabinovich vs Alekhine, 1920  (E43) Nimzo-Indian, Fischer Variation, 39 moves, 0-1 38 ... Rxf3! White e2-queen defends b2-rook from Black c1-queen Taimanov vs Karpov, 1973  (E54) Nimzo-Indian, 4.e3, Gligoric System, 39 moves, 0-1 39 ... Rxb3! White b2-queen defends e2-rook from Black d1-queen Van Wely vs Radjabov, 2007  (E97) King's Indian, 40 moves, 0-1 31 Nxe5! Black d6-pawn defends c5-knight from White c4-queen Ivanchuk vs Topalov, 2007  (B90) Sicilian, Najdorf, 41 moves, 1-0 41 ... Nf8-e6?? White a6-rook ties Black d4-knight to c6-pawn A Adly vs G Meier, 2007  (A07) King's Indian Attack, 51 moves, 1-0 27 ... Nd2-f1! Black f5-queen => White e5-bishop ties down e1-Q Smeets vs Y Hou, 2008  (C13) French, 58 moves, 0-1 White a7-rook=>Black e7-bishop, White e5-bishop=>Black f6-knigh Short vs I Cheparinov, 2008  (B92) Sicilian, Najdorf, Opocensky Variation, 72 moves, 1-0 10 games