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Subject: It's not a mate in 13

Author: Olaf Jenkner

Date: 09:23:37 05/06/03

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On May 06, 2003 at 07:32:45, Enrique Irazoqui wrote:

>Another study of Grigoriev, this time a mate in 11.
>
>[D]4Q3/4pp2/8/1p5P/1P1p2p1/K7/1p3P2/k7 w - - 0 1
>
>Grigoriev,N - Study
>1934
>
>1.Qd8 e5 2.Qg5 f6 3.Qh6 f5 4.Qg5 b1Q 5.Qd2 f4 6.h6 g3 7.h7 g2 8.h8Q g1Q 9.Qxd4+
>exd4 10.Qxd4+ Qb2+ 11.Qxb2# # 1-0
>
>Enrique

After 8.h8Q black plays better Qd4+ and the mate comes one move later.

A brute force search did not find a mate in 13.

Olaf Jenkner

• Re: It's not a mate in 13 Enrique Irazoqui 09:31:02 05/06/03
  • Re: It's not a mate in 13 Olaf Jenkner 09:36:22 05/06/03
• It's a mate in 14 Olaf Jenkner 09:29:15 05/06/03
  • Re: It's a mate in 14 Heiner Marxen 10:41:44 05/06/03
    • Re: It's a mate in 14 Olaf Jenkner 05:04:28 05/07/03
  • Re: It's a mate in 14 Enrique Irazoqui 09:42:00 05/06/03
  • Re: It's a mate in 14 Olaf Jenkner 09:39:36 05/06/03
    • Re: It's a mate in 14 Enrique Irazoqui 10:17:21 05/06/03

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