Author: Enrique Irazoqui
Date: 04:27:42 03/04/01
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On March 04, 2001 at 06:09:44, Sune Larsson wrote: > > [D]4k3/3nn3/1p2pbp1/pP1p1pBp/P2P1P1P/4KPP1/4B3/2R5 w - - 0 1 > > Hilse-Kunstmann, Hamburg 1921 > > The story goes that the black player just had realized, that in > the long run he would lose this game. It was an important match > and he had stubbornly defended his difficult position, being an > exchange down, when a sudden touch of magic and inspiration entered > his mind... So, he played Kd8-e8, wrote down the move in his > score sheet, and shook his head. The following deep sigh convinced > the white player that his victory was close. We now have the > position in the diagram above. > > Here white quickly played 1.Rc7 and glanced at his more and more > depressed opponent. Black sighed once more and replied with 1.-Kd8. > Yes, in lost positions additional mistakes come easy, white thought, > and played his decisive 2.Rxd7+?. Instead of resigning, the black > player now smiled, quickly played 2.-Kxd7 and ordered two sandwiches > with Wurst and a cup of coffee... > > Test: Does your program avoid the trap 1.Rc7 Kd8 *2.Rxd7+?* > This position is now a draw. > > Sune After 1.Rc7 Kd8, Deep Fritz and Deep Shredder take the knight with a winning evaluation for at least 15 minutes. I don't think that any engine will see the draw because they don't understand blocked positions. It would take a search at least 100 plies deep for the 50 move rule. Enrique
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