"... Cold-blooded gamesman-planning is rare. But I have one pretty example. At my first British Championship, [at Ramsgate] in 1929, a friend of mine – who is a magnificent analyst and celebrated in the chess world – found himself in a very bad position. But there was a way out. Given that his opponent (a very strong player) did not see the threat, it was possible, with a series of sacrifices, to achieve stalemate. But he had to include in his play a clearly inadequate move, which would inevitably warn his opponent. After all, one plays chess on the assumption that the opponent sees everything. (That is why the word “trap” is not a good chess term.) But my friend devised a psychological trap. He sat and looked at the board with a despairing face until he was well and truly in time trouble. Then he fumblingly made the crucial moves. His opponent, tempted to a little gamesmanship himself, was playing very quickly. Quick came the erroneous capture. Even quicker came the series of sacrifices and, while the flag was tottering, stalemate supervened. Now could he have improved on things in the following way: touched the piece, taken his hand away, and let himself be compelled to move the piece at random? No, he had thought of that, but dismissed it as sharp practice."

After 39,Rxf7+, if 39...Kxf7, then it is a stalemate. If 39...Kg8 (or 39...Kh8), then 40.Rf8+. Black cannot touch the rook without stalemate. If 39...Kh6, then 40.Rxh7 Kxh7 is a stalemate.