Test Position: Baburin-Adianto, Liechtenstein 1993

[zullil]

However, looking at the position before 23.- ..., Ke7!!:

[d]q1r1k2r/1b3pp1/p3p3/P1b5/1pN1P3/3BBPp1/1P2Q1P1/R4RK1 b k - 1 23

Chest 5.2 has not found any checkmate in 14 moves or less in a search in special mode (not normal mode). I interrupted the search in 15 after 55 minutes of analysis:

Code: Select all

FEN: q1r1k2r/1b3pp1/p3p3/P1b5/1pN1P3/3BBPp1/1P2Q1P1/R4RK1 b k - 1 4 

ChestUCI_52:
FEN: q1r1k2r/1b3pp1/p3p3/P1b5/1pN1P3/3BBPp1/1P2Q1P1/R4RK1 b k -   (12+12)
Stellungs-Analyse:  C0/R0/K1/P9/X30   S:10/36
Suche nach Spezial-Matt [C0/R0/K1/P9/X30] in 15 ...  (Hash=512MB)
Berechnung abgebrochen !

It seems that Chest disagrees with the claim of checkmate in 12 moves given by Stockfish_15090721_x64_modern in one of your posts. I recall that the search was done in special mode, not in normal mode.

Regards from Spain.

Ajedrecista.

Cfish-dev says:

Mate in 12 23... Ke7 24. Qd2 Bxe3+ 25. Rf2 Bxd2 26. Nb6 Qb8 27. Rd1 Rc5 28. Nd5+ exd5 29. exd5 Qa7 30. Rdxd2 Rc1+ 31. Bf1 Qe3 32. d6+ Kf8 33. b3 Rxf1+ 34. Kxf1 Rh1# (depth 71, 0:00:17)

[Dann Corbit]

I see mate in 12 at depth 25 with cfish:
[d]q1r1k2r/1b3pp1/p3p3/P1b5/1pN1P3/3BBPp1/1P2Q1P1/R4RK1 b k -
info depth 25 seldepth 25 multipv 1 score mate 12 nodes 127569780 nps 9248878 hashfull 41 tbhits 2 time 13793 pv e8e7 e2d2 c5e3 f1f2 e3d2 c4b6 a8b8 a1d1 c8c1 d1c1 b8f4 b6d5 e6d5 c1c7 f4c7 e4d5 c7c1 d3f1 g3f2 g1f2 c1e1 f2g1 d2e3

And for the related position:
[d]q1r1k2r/1b3pp1/p3pn2/P1b5/1pN1P2p/3B1P2/1P2Q1PP/R1B2R1K b k -
info depth 40 seldepth 62 multipv 1 score cp 766 nodes 16830891121 nps 11663099 hashfull 996 tbhits 82603 time 1443089 pv f6h5 g2g3 h4g3 h2h4 c8d8 h1g2 a8b8 d3c2 b7c6 b2b3 b8f4 c1d2 f4h4 f1h1 h4f6 a1f1 g7g5 e2e1 c5f2 f1f2 g3f2 g2f2 h5f4 d2e3 h8h1 e1h1 f6c3 h1c1 c6b5 c1b2 d8d3 b2c3 d3c3 c2d1 b5c4 b3c4 b4b3 d1b3 c3b3 e3f4 g5f4 f2g2 e8e7 g2h3

[zullil]

I see mate in 12 at depth 25 with cfish:

Yes, the mate-in-12 was found much before the depth 71 that I stopped at.