Greko 12.9

[Werner]

Whow,
very fast!!

Thanks Daniel

[Werner]

Small problem Daniel:

I analyze this position and die engine crashes at depth 18 (only 64bit version):
FEN: 4k3/4p3/8/8/3p4/8/4N3/4KB2 w - - 0 2

GreKo 13.0:
1 00:00 12 196 +7,49 Se2xd4
2 00:00 48 786 +7,47 Se2xd4 e7-e5 Lf1-b5+ Ke8-e7
3 00:00 175 3k +7,47 Se2xd4 e7-e5 Lf1-b5+ Ke8-e7
4 00:00 685 11k +7,40 Se2xd4 e7-e5 Lf1-b5+ Ke8-e7 Sd4-f3
5 00:00 2k 33k +7,54 Se2xd4 e7-e5 Sd4-f5 Ke8-d7 Lf1-c4
6 00:00 5k 78k +7,45 Se2xd4 e7-e5 Sd4-f5 Ke8-d7 Lf1-c4 e5-e4
7 00:00 12k 193k +7,58 Se2xd4 e7-e5 Sd4-f5 Ke8-f7 Lf1-d3 Kf7-e6 Ke1-d2
8 00:00 31k 404k +7,71 Se2xd4 e7-e5 Sd4-f5 Ke8-d7 Lf1-c4 Kd7-c6 Ke1-d2 e5-e4
9 00:00 91k 2.949k +7,84 Se2xd4 Ke8-f7 Ke1-f2 Kf7-f6 Kf2-e3 e7-e5 Sd4-c6 Kf6-e6 Lf1-c4+ Ke6-d6
10 00:00 300k 3.229k +7,84 Se2xd4 Ke8-d7 Ke1-d2 e7-e5 Sd4-b5 Kd7-c6 Kd2-e3 Kc6-d5 Sb5-c3+ Kd5-d6 Lf1-c4
11 00:00 485k 3.110k +8,03 Se2xd4 Ke8-d7 Ke1-d2 e7-e5 Sd4-f5 Kd7-e6 Lf1-d3 Ke6-f6 Kd2-e3 Kf6-e6 Ke3-e4
12 00:00 1.046k 3.533k +8,47 Se2xd4 Ke8-d7 Lf1-h3+ Kd7-d6 Ke1-d2 Kd6-e5 Kd2-e3 Ke5-d6 Ke3-e4 Kd6-c5 Ke4-e5 Kc5-c4 Lh3-f5
13 00:00 1.802k 3.851k +8,47 Se2xd4 Ke8-d7 Lf1-h3+ Kd7-d6 Ke1-d2 Kd6-e5 Kd2-e3 Ke5-d5 Lh3-e6+ Kd5-e5 Ke3-d3 Ke5-d6 Kd3-e4 Kd6-c5 Ke4-e5
14 00:00 3.576k 4.022k +8,53 Se2xd4 Ke8-d7 Lf1-h3+ Kd7-d6 Ke1-d2 Kd6-e5 Kd2-e3 Ke5-d5 Lh3-e6+ Kd5-e5 Ke3-d3 Ke5-d6 Kd3-e4 Kd6-c7 Ke4-e5 Kc7-d8
15 00:02 8.704k 4.165k +8,63 Ke1-d2 Ke8-f7 Se2xd4 Kf7-f6 Kd2-e3 Kf6-e5 Lf1-g2 Ke5-d6 Ke3-e4 Kd6-d7 Ke4-e5 Kd7-e8 Ke5-e6 Ke8-f8 Lg2-e4
15 00:02 10.703k 4.184k +9,13 Ke1-d2 e7-e5 Kd2-d3 Ke8-e7 Kd3-e4 d4-d3 Ke4xd3 Ke7-d6 Kd3-e4 Kd6-c5 Ke4xe5 Kc5-b4
16 00:03 13.964k 4.223k +9,13 Ke1-d2 Ke8-d7 Kd2-d3 Kd7-d6 Kd3xd4 Kd6-e6 Kd4-e4 Ke6-d6 Se2-d4 Kd6-c5 Ke4-e5 Kc5-b6 Sd4-f5 Kb6-c5 Sf5xe7 Kc5-b6
17 00:05 21.576k 4.282k +9,13 Ke1-d2 Ke8-f7 Se2xd4 Kf7-f6 Kd2-e3 Kf6-e5 Lf1-g2 Ke5-d6 Ke3-e4 Kd6-d7 Ke4-e5 Kd7-c7 Lg2-f1 Kc7-d8 Sd4-c6+ Kd8-c7 Sc6xe7 Kc7-b6
18 00:08 38.456k 4.295k +9,24 Ke1-d2 Ke8-f7 Se2xd4 Kf7-f6 Kd2-e3 Kf6-e5 Lf1-c4 Ke5-d6 Sd4-f5+ Kd6-d7 Ke3-e4 Kd7-d8 Ke4-e5 Kd8-e8 Ke5-e6 Ke8-d8 Sf5xe7 Kd8-e8 Lc4-d5

[cdani]

Small problem Daniel:

I analyze this position and die engine crashes at depth 18 (only 64bit version):

I tried to understand the problem, but seems that will require to first understand some core functionality of the code, so it will require time. I'm sorry I can't spend time on this at least for now. Is not compilation related, because what I have to do to compile to 64 bits is simple and does not modify the code.

Maybe someone can spend some time on this.
I'm sorry.

[Dariusz]

Thank you Michael for mac version.

[Werner]

Hi Vladimir,
why does 64bit crash and 32bit not?

[WinPooh]

Hi Vladimir,
why does 64bit crash and 32bit not?

Sorry, I develop and test on 32-bit only, can't even reproduce this bug at the moment.

[mar]

not sure if it's related but I think there's a bug (typo) in eval.cpp at lines 570 and 596 (got asserts),
I think it should be

Code: Select all

	if (pos.MatIndex(WHITE) == 3 && pos.Count(BW) == 1)

and

Code: Select all

	if (pos.MatIndex(BLACK) == 3 && pos.Count(BB) == 1)

I tried to make a 64-bit build and it finished depth 19 without problems (in Werner's position)

[cdani]

not sure if it's related but I think there's a bug (typo) in eval.cpp at lines 570 and 596 (got asserts),
I think it should be

Code: Select all

	if (pos.MatIndex(WHITE) == 3 && pos.Count(BW) == 1)

and

Code: Select all

	if (pos.MatIndex(BLACK) == 3 && pos.Count(BB) == 1)

I tried to make a 64-bit build and it finished depth 19 without problems (in Werner's position)

I just tried this change and it crashes for me:

Code: Select all

position fen 4k3/4p3/8/8/3p4/8/4N3/4KB2 w - - 0 2
go depth 30
info multipv 1 depth 1 score cp 749 time 0 nodes 12 pv e2d4

info multipv 1 depth 2 score cp 747 time 0 nodes 48 nps 3000 pv e2d4 e7e5 f1b5 e
8e7
info time 16 nodes 48 nps 3000
info multipv 1 depth 3 score cp 747 time 16 nodes 175 nps 10937 pv e2d4 e7e5 f1b
5 e8e7
info time 16 nodes 175 nps 10937
info multipv 1 depth 4 score cp 740 time 16 nodes 685 nps 42812 pv e2d4 e7e5 f1b
5 e8e7 d4f3
info time 16 nodes 685 nps 42812
Assertion failed: bb != 0, file f:\escacs\arena\engines\greko-13.0\src\bitboards
.h, line 136

[Werner]

I tried to make a 64-bit build and it finished depth 19 without problems (in Werner's position)

Hi Martin,
can you please provide this build for download or send me a version?
Maybe it is something compiler relevant?

thanks
Werner

[mar]

I just tried this change and it crashes for me:

Ah yes, it seems there is more.
I think the conditions one line below should read

Code: Select all

		if (pos.MatIndex(WHITE) == 0 && pos.Count(PW) == 1)

and

Code: Select all

		if (pos.MatIndex(WHITE) == 0 && pos.Count(PW) == 1)

But I'm not quite sure on this one, best would be to wait for Vladimir to respond.