[Event "The Hague"] [Site "Wch18-NLD\URS The Hague ;MAI"] [Round "0"] [White "Euwe"] [Black "Smyslov"] [Result "0-1"] [FEN "3b2n1/1q3p1k/6pp/np2N3/2bBPN2/1pP4P/4QPP1/1B4K1 w - - 0 33"] {In this positon White has the following straightforward win} 33. Nexg6 { This sacrifice is also correct, and incidentally more attractive than the above method} (33. Qg4 Nf6 34. Qg3 Nxe4 35. Qe3 {Whether Black retreats the knight or protects it with ... Pf5, the replay 4. Nexg6 is crushing - Smyslov}) 33... fxg6 (33... Bxe2 34. Nf8#) 34. Nxg6 $2 {Just as in the previous example it is the second Knight sacrifice which is wrong} (34. Qg4 $1 Qf7 (34... Ne7 35. e5 Bf7 36. h4 $1 Qc6 37. e6 Be8 38. h5 $18) (34... Bf7 35. e5 Bg5 36. e6 Bxf4 (36... Be8 37. Nxg6 Bxg6 38. Qf5 $1 Qg7 39. Qf7 $3 Qxf7 40. exf7 Bxb1 41. f8=N# $1) 37. Qxf4 Bxe6 38. Qe5 $18) (34... Bg5 35. Nxg6 Kxg6 36. Qf5+ Kh5 37. g4+ Kh4 38. Qe5) 35. e5 Ne7 36. e6 Qe8 37. Nh5 Ng8 38. Ng7 { Black's Queenn must give up protection of g6}) 34... Kxg6 (34... Qf7 35. Nf8+ ( 35. Qd1 $1 Qxg6 36. e5) 35... Qxf8 36. e5+ Kh8 37. Qe4 Qg7 38. e6 Nf6 $1) 35. e5+ Kf7 36. Qh5+ Kf8 37. f4 (37. Bc5+ Be7 38. Qf5+ Ke8 39. Qg6+ Bf7) 37... Bb6 38. Qf5+ Ke7 39. Qh7+ {Very fine} 39... Kd8 40. Bxb6+ (40. Qxb7 Bxd4+ { interpolating before recapturing}) 40... Qxb6+ 41. Kh2 Qe3 42. Qf5 Nc6 0-1