mmt Vs. Ovyron (G4 D5 BG2)

[jp]

No, all this time I've been talking about A/B engines that report mate scores and how they behave or misbehave.

You claimed this.

there's no possible scenario where a mate announcement that was shorter than reality made it to the root

That's a claim without content, because you just justify it by handwaving that when it's not true it's "just a bug". Look at my comments before about "just a bug".

[Ovyron]

if 29... Bxf1 then 30. Raxf1

Accepted. I did take a deep look at 29...Bb5 just in case, looked like what I had 2 moves ago.

1. g4 d5 2. Bg2 Bxg4 3. c4 c6 4. Qb3 e6 5. Qxb7 Nd7 6. Nc3 Ne7 7. cxd5 exd5 8. d4 Rb8 9. Qa6 Rb6 10. Qd3 Ng6 11. h3 Be6 12. Nf3 Bd6 13. h4 h5 14. b3 Nf6 15. Bg5 O-O 16. e3 Re8 17. Kf1 Bg4 18. Ne1 Bb4 19. Na4 Rb8 20. Nc2 Be7 21. f3 Be6 22. Nc5 Bc8 23. Kf2 Nd7 24. Ne6 Qa5 25. Bxe7 Rxe7 26. b4 Qb6 27. Ng5 Ba6 28. Qa3 Rbe8 29. Bf1 Bxf1 30. Raxf1

[d]4r1k1/p2nrpp1/1qp3n1/3p2Np/1P1P3P/Q3PP2/P1N2K2/5R1R b - -

My turn again.

[Ovyron]

No, all this time I've been talking about A/B engines that report mate scores and how they behave or misbehave.

You claimed this.

there's no possible scenario where a mate announcement that was shorter than reality made it to the root

That's a claim without content, because you just justify it by handwaving that when it's not true it's "just a bug". Look at my comments before about "just a bug".

I don't remember what we were saying in those posts, can you restate you point again?

My point is: "For A/B engines that report mates they will not report mates where the defending side could have defended better to shorten it unless there's a bug." That's as concise as I can get it.

[Ovyron]

if 29... Bxf1 then 30. Raxf1

1. g4 d5 2. Bg2 Bxg4 3. c4 c6 4. Qb3 e6 5. Qxb7 Nd7 6. Nc3 Ne7 7. cxd5 exd5 8. d4 Rb8 9. Qa6 Rb6 10. Qd3 Ng6 11. h3 Be6 12. Nf3 Bd6 13. h4 h5 14. b3 Nf6 15. Bg5 O-O 16. e3 Re8 17. Kf1 Bg4 18. Ne1 Bb4 19. Na4 Rb8 20. Nc2 Be7 21. f3 Be6 22. Nc5 Bc8 23. Kf2 Nd7 24. Ne6 Qa5 25. Bxe7 Rxe7 26. b4 Qb6 27. Ng5 Ba6 28. Qa3 Rbe8 29. Bf1 Bxf1 30. Raxf1 Qc7

[d]4r1k1/p1qnrpp1/2p3n1/3p2Np/1P1P3P/Q3PP2/P1N2K2/5R1R w - -

[jp]

4r1k1/p1qnrpp1/2p3n1/3p2Np/1P1P3P/Q3PP2/P1N2K2/5R1R w - -

Komodo 13.2, depth 29 & 30: -1.12 & -1.18 (Rfg1).

[mmt]

1. g4 d5 2. Bg2 Bxg4 3. c4 c6 4. Qb3 e6 5. Qxb7 Nd7 6. Nc3 Ne7 7. cxd5 exd5 8. d4 Rb8 9. Qa6 Rb6 10. Qd3 Ng6 11. h3 Be6 12. Nf3 Bd6 13. h4 h5 14. b3 Nf6 15. Bg5 O-O 16. e3 Re8 17. Kf1 Bg4 18. Ne1 Bb4 19. Na4 Rb8 20. Nc2 Be7 21. f3 Be6 22. Nc5 Bc8 23. Kf2 Nd7 24. Ne6 Qa5 25. Bxe7 Rxe7 26. b4 Qb6 27. Ng5 Ba6 28. Qa3 Rbe8 29. Bf1 Bxf1 30. Raxf1 Qc7 31. Qd3

[d]4r1k1/p1qnrpp1/2p3n1/3p2Np/1P1P3P/3QPP2/P1N2K2/5R1R b - - 1 1
This was not LC0's first choice (-2.36 vs -2.33 for Rfg1 and Re1) but when faced with SF's responses it again realizes that the other two choices are poor.

[Ovyron]

Also had 31. Qd3 as best, with Rfg1 in the -2.40s. I've been slow to make the score rise, let's see if I can get in the -2.40s for this one.

[Alayan]

I'm surprised by how low the Komodo evals are.

Ethereal 11.98 immediately hates white's position going below -2 very quickly. It found a move at depth 13 (EDIT : it's also a5) and is still sticking with it at depth 43 with an eval of -2.36 (this includes the default contempt).

[jp]

4r1k1/p1qnrpp1/2p3n1/3p2Np/1P1P3P/3QPP2/P1N2K2/5R1R b - - 1 1

Komodo 13.2, depth 27 [and 28], top 3 moves: -1.32 (...a5), -1.26, -1.02 [and -1.31, -1.29, -1.08].

[Uri Blass]

I'm surprised by how low the Komodo evals are.

Ethereal 11.98 immediately hates white's position going below -2 very quickly. It found a move at depth 13 (EDIT : it's also a5) and is still sticking with it at depth 43 with an eval of -2.36 (this includes the default contempt).

I see no reason to be surprised by low evaluations.

Without analysis by engines my thoughts are:
1)material is equal
2)I do not see a plan to win material or to attack the king so it may be a draw because I do not see a way to take advantage of white's weaknesses.

I guess that black is winning because I trust better engines but
the question is not for the reason that komodo's evaluation is low but for the reason that Ethereal's evaluation or stockfish's evaluation is so high.