Levant, White won: 1. Qe6+ Kh4 If 1...Kxh5 then 2.Qg6+ Kh4 3.Qh6+ skewers the black queen. 2. Qf6+ Kh3 3. Qc3+ Kg2 4. Qd2+ Kg1 5. Qe3+ Kg2 6. Nf4+ If 6...Kf1 then 7.Qe2+ Kg1 8.Qe1+ Kh2 9.Qf2+ Qg2 10.Qxg2#. White could have won more quickly by 1.Qg8+ Kh4 2.Qg3+ Kxh5 3.Qg6+ Kh4 4.Qh6+ and White skewers the black queen. The second position is from a 1982 game between former world champion Boris Spassky and then world champion Anatoly Karpov. The position is a theoretical draw but Karpov later blundered in time trouble and resigned on move 84. Example from a study In this 1967 study by Vitaly Halberstadt, White wins. The solution is: 1. Be5+ Ka8 2. Qb5 Not 2.Qxf7 stalemate. 2... Qa7+! 3. Ke2! Qb6! 4. Qd5+ Qb7 5. Qa5+ Qa7 6. Qb4! Qa6+ 7. Kd2! Qc8 8. Qa5+ Kb7 9. Qb5+ Ka8 10. Bd6! Qb7 11. Qe8+ Ka7 12. Bc5+ Ka6 13. Qa4#. Rooks and minor pieces Two rooks versus two minor pieces: this is normally a win for the rooks. Henri Rinck discovered more than 100 positions that are exceptions. Two bishops and a knight versus a rook: this is usually a win for the three pieces but it takes up to sixty-eight moves. Howard Staunton analyzed a position of this type in 1847, and correctly concluded that the normal result of this ending is a win for the three minor pieces. A bishop and two knights versus a rook: this is usually a draw, but there are some wins for the three pieces requiring up to forty-nine moves. Staunton in 1847 correctly concluded that the normal result of this endgame is a draw. Bernhard Horwitz and Josef Kling gave the same appraisal in 1851. During adjournment of the Karpov versus Kasparov game, Kasparov (initially unsure if it is a draw) analyzed that a successful defense is having the king near a corner that the bishop does not control, keeping the rook far away to prevent forks, and threatening to sacrifice it (for stalemate or for the bishop, which results in a draw, see two knights endgame). Tablebases show that it is usually a draw, no matter which corner the defending king is in. (See the position from the Karpov versus Kasparov game for a drawn position, and see Fifty-move rule#Karpov vs. Kasparov, 1991 for more discussion of this game.) Curiously, Grandmaster James Plaskett also had