|May-17-05|| ||notyetagm: This game provides The Times Online Daily Chess Puzzle by GM Keene for Friday, May 13. The puzzle position occurs after Black's 34th move, White to play and win. If you need a hint, the solution exploits the <overworked> nature of the Black e4-bishop.|
|May-17-05|| ||Kangaroo: I felt that Werner was the first name and Golz the last.|
|May-17-05|| ||notyetagm: After the winning move, 35 f3!, Black is unable to prevent mate in view of the twin threats of 36 h3# and 35 ... xf3 36 xg6#.|
When I analyzed the position before White's 35th move, I was struck by the fact that <the powerful White queen on the f7-square creates 3 distinct mating motifs: backrank, Greco, and stalemated king>. By covering the g7- and h7-squares, the White queen traps the Black king on his first rank, allowing <backrank> mating ideas. By covering the g8- and g7-squares (and with the g6-square self-blocked), the White queen traps the Black king on the open h-file, allowing <Greco> mating ideas of swinging a rook to the h-file (f1-f3-h3#). Finally, by covering the g8-, g7- and h7-squares, the White queen <stalemates> the Black king so that <any check is mate>, in particular the White e7-knight going to g6 (e7-g6#). It is the combination of these latter two mating patterns (f1-f3-h3#, e7-g6#) which creates the winning move and forces mate.
|May-17-05|| ||notyetagm: When I solved the puzzle, I found that 35 f3! forces mate. But I also found another strong move, 35 f5!. This move wins at least queen for rook, based on the tactical theme of <interference> in the lines 35 f5! xf5 36 gxf5 xe7 37 xe7 or 35 f5! g8(d6) 36 xg6+ xg6 37 xg6 xf5 38 xf5. But I did not analyze this line rigorously once I calculated that 35 f3! was a forced mate.|
So 35 f3! forces mate by <deflection> and 35 f5! wins material by <interference>. Very nice tactics to crown an excellent positional performance from Smyslov.
|May-17-05|| ||notyetagm: Just realized that in the interference line giving above Black can play better by 35 f5! xe7!? 36 xe7 gxf5 37 gxf5 in which Black loses his queen for a rook and a knight.|