|Dec-05-09|| ||Dr. Siggy: The cumbersome <checkmate with Bishop and Knight> was given by Karttunen <according to the method recommended by Dr. Tarrasch> in his great classic "The Game of Chess", english transl., London 1935, pages 40-44.|
The more difficult part came after 88... Kc8:
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The Black King had to be forced into the suitable (black) corner. The White King moved only along the sixth rank as far as g6: he, therefore, made the moves Kc6-d6-e6-f6-g6. Until the Black King was in the correct corner, the Knight had to made only the four zig-zag moves Nc7-d5-e7-f5-g7. The Bishop had to rob the Black King of black squares and, in addition, to make a waiting move now and then.
After 103... Kh8, Kartunnen had to be beware of stalemate. Therefore, he made another waiting move with the Bishop, and Rasik resigned because he could not avoid checkmate in two moves: 104... Kg8 105. Nh6+ Kh8 106. Bd4#.