(Tf8)45.c4 29Ng3 100 (bxc4)46.Qd3 28bxc4 1347.Qxc4 13Rxb3 2148.Qxb3 14Re8 8 (Dd7)49.Bb6 39Qd7 1550.Nd8‼ 19 It is not only for the depth but the briliant idea behind this move: Black must take and then:Rxd8 4851.Bxd8 14Qxd8 1552.Qb7 9Qg8 2053.a4! 21 Black's two minor pieces are rather clumsy. Black loses one way or another.Nf5 15 (Lf8)54.Qxa6 43Qxd5+ 455.Qc4 25Qg8 1356.Qxg8+ 17 (a5)Kxg8 057.a5 8e4 958.a6 19Bd4 659.Rc4 8 Threatening Rxd4 followed by a7-a8Bg1 1360.Rxe4 26Kf7 22 (d5)61.Rxf4 32d5 1262.Rb4 17Ke6 10 (Sd6)63.Rb7 21Nxh4 1064.f4 10 (b4)Ng2 365.Rxh7 35Nxf4 1866.a7 1 (b4)Bxa7 367.Rxa7 8d4 17 (Sh3)68.Ra5 261–0