Other fun mates

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Vinvin
Posts: 4690
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Other fun mates

Post by Vinvin » Sat Aug 01, 2020 11:30 pm

What's the shortest mate here ?
It should be between 30 and 40.

[d]2b3kq/2Pp2p1/3P2Qb/7P/3p1pPp/3P1p1K/5P2/8 w - - 0 6

Paloma
Posts: 953
Joined: Thu Dec 25, 2008 8:07 pm

Re: Other fun mates

Post by Paloma » Sun Aug 02, 2020 1:57 am

Very difficult.
Why is the move counter set to 6?
Part of a Study?

6. Kxh4 Kf8 7. g5 Bxg5+ 8. Qxg5 Kg8 9. Qe7 Qh6 10. Qe8+ Kh7 11. Qxc8 Qf6+ 12.
Kg4 Qe6+ 13. Kxf3 Qh3+ 14. Ke4 Qe6+ 15. Kxf4 Qxd6+ 16. Ke4 Qe7+ 17. Kd5 Qe6+
18. Kxd4 Qf5 19. f3 Qf6+ 20. Kc4 Qc6+ *

crystal does not get further, shows since some moves +98.xx

Vinvin
Posts: 4690
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Other fun mates

Post by Vinvin » Sun Aug 02, 2020 2:19 am

Paloma wrote:
Sun Aug 02, 2020 1:57 am
Very difficult.
Why is the move counter set to 6?
Part of a Study?

6. Kxh4 Kf8 7. g5 Bxg5+ 8. Qxg5 Kg8 9. Qe7 Qh6 10. Qe8+ Kh7 11. Qxc8 Qf6+ 12.
Kg4 Qe6+ 13. Kxf3 Qh3+ 14. Ke4 Qe6+ 15. Kxf4 Qxd6+ 16. Ke4 Qe7+ 17. Kd5 Qe6+
18. Kxd4 Qf5 19. f3 Qf6+ 20. Kc4 Qc6+ *

crystal does not get further, shows since some moves +98.xx
Yes, it's deep.
The position was found here : viewtopic.php?p=853698#p853698
I found mate in about all lines, but I get not enough memory to memorize all mates values in all variations.
It probably requires 64 GB of memory and 30 minutes with 16 cores.

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