TalkChess.com

Mate in 39: 1. Kd1 h6 2. Nh3 Bh2 3. Nf4 Kg1 4. Nf3+ Kf1 5. Kd2 Bg1 6. Ke3 Bh2 7. Ke4 Bg1 8. Kf5 Bh2 9. Kg4 Bg1 10. Kh3 Bh2 11. Kh4 Bg1 12. Kg4 Bh2 13. Kf5 Bg1 14. Ke4 Bh2 15. Ke3 Bg1 16. Kd2 Bh2 17. Kd1 a4 18. Kd2 Bg1 19. Ke3 Bh2 20.Ke4 Bg1 21. Kf5 Bh2 22. Kg4 Bg1 23. Kh3 Bh2 24. Kh4 Bg1 25. Kg4 Bh2...

Gustav’s solution (11 sec.) for mate in 26: 1.Kf8-e7 Lh7-g8 2.Ke7-d7 Lg8-h7 3.Kd7-c7 Lh7-g8 4.Kc7-b6 Lg8-h7 5.Kb6-c5 Lh7-g8 6.Kc5-b4 Be6-e5 7.Kb4-c5 Lg8-h7 8.Kc5-b6 Lh7-g8 9.Kb6-c7 Lg8-h7 10.Kc7-d7 Lh7-g8 11.Kd7-e7 Lg8-h7 12.Ke7-f8 Bh5-h4 13.Kf8-e7 Lh7-g8 14.Ke7-d7 Lg8-h7 15.Kd7-c7 Lh7-g8 16.Kc7-b6 ...

kB5K/2P4B/P4rP1/4r3/2N1n3/1RP4N/3b4/6RQ b - - bm #-67; Defence;

It's mate in 67.

Nordlandia wrote:250.00 after 40 minutes calculating time?

I assume 6men is used.

Yes, 6 men Szygy.

Komodo says +250.00 with 1.h4. FEN: 6K1/4p3/3b4/8/b7/2Bk4/7P/2R5 w - - 0 1 Komodo-9.42-64bit: 40+ 10:29 5.390.771.498 8.562.301 +4,85 h2-h4 Ad6-f4 Tc1-f1 41+ 14:36 8.250.394.449 9.411.851 +4,92 h2-h4 Ad6-f4 Tc1-f1 41+ 16:41 9.757.808.581 9.742.930 +4,99 h2-h4 Aa4-e8 Ac3-b2 41+ 18:52 11.392.564.163 1...

Hi Marek, I send you hard mate positions for Sting: [d]1N1n4/2BPbpPb/3r1p2/2p1kP2/2p1p1P1/2p1P2K/p1P3RP/3R1N1q w - - 0 1 Mate in 17 with Rg3 [d]B7/p1p5/k2p4/p3p3/P1Nb1p2/6p1/7p/3K4 w - - 0 1 Mate in 18 with Ke1 (Ke2) [d]8/pp1p2K1/rrbQ4/kp1n4/1p6/8/P1N5/8 w - - 0 1 Mate in 18 with Kh7 [d]Q3b3/1p2q3/1...

Spark 0.4 needs 6 seconds. FEN: n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1 Spark-0.4-win64-mp-corei: 19/37 00:01 17.376.121 14.443.990 +3,88 Rb2-c2 d5-d4 Cc8-d6 c7xd6 Tf6xd6 f7-f6 Ae7xf6+ Rg7-f7 Af6xh8 Th7xh8 Th5xh6 Th8xh6 Td6xh6 Ca8-c7 Th6-d6 Rf7-e8 Td6-d7 Cc7-d5 Td7-g7 Ag8-f7 Tg7x...

For the second position and with right parameters, Gustav 7 seconds and Chest 10 seconds. EDIT: Chest needs 3 seconds.

Gustav 3.3b (f1, z14) needs 1 min 42 sec. for mate in 74.

Gustav 3.3b (f0, z12) needs 23 min. 7 sec. for mate in 29.