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Something different this time. This position can be reached after Black’s 8th move in a game by a
unique sequence of moves. What is the game score?
Much can be deduced about the sequence of Black’s moves. The e-pawn must have moved to allow the queen to reach f3 via f6, then the f-pawn moved to make way for the king. If White’s knight from g1 has been captured then the capture must have taken place on an even-numbered move and hence a black square, as only the b1 knight and rooks would then be available to make the remaining moves, and none could return to its starting square in an odd number of moves. The only square on which the knight could have been captured is f6, but the queen must arrive on f6 no later than move three, which is too early for the knight. Therefore the missing knight must have started on b1, giving the sequence 1.Sc3 e5 2.Sd5 (not e4!) 2...e4 3.Sf6 Qxf6 4.Sh3 (not f3!) 4...Qf3 5.Sf4 f5 6.Sd5 Kf7 7.Sc3 Kg6 8.Sb1 Kh5.
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