TalkChess.com

It is well known that you must not rely on the hash table for anything that is dangerous if inaccurate. For example I used to retrieve check status (is side to move in check?). But in case of a collision, getting this wrong could cause a crash. That said, there are many other possible causes of cras...

You didn't say (and maybe the CCC team didn't say) what the issue was. I use cutechess-cli with Winboard protocol all the time, and have had no issues. You can use the -debug flag to cutechess-cli to get all engine output/input logged, which can be helpful in finding engine-specific issues.

--Jon

This was played on playchess.com com. Komodo seemed clueless that it was heading into a lost position. At this point: 1k6/3b4/1b1q4/8/8/pPQp1PP1/P5KP/4R3 b - - 0 31 White has what looks like a material advantage (Rook + 3 pawns vs. 2 bishops) but in fact White is probably lost at this point. Best is...

Houdini 6 finds it pretty fast, too.

--Jon

mobility area being "enemy or empty squares, also exclude opp king square and ranks 1 and 2" does not make much sense to me. I'd just include empty squares and exclude squares attacked by enemy pawns, at least for starters. Commonly pawns that are attacked are part of a chain and actually restrict m...

Seems that 39. ... g6 is the last irreversible move. So it is "on the edge" of the 50 moves rule. Can I get the complete pgn from this game so I can test myself? Seems that I cannot just copy it from the post as the starting fen isn't there. ./Andreas This is the PGN: [Event "?"] [Site "?"] [Date "...

I was looking at the following game and was examining this position: 3r4/1pq2pk1/p2N2p1/P1P1p2p/QP1bPp2/5P1P/6P1/2R4K w - - 0 89 where Fire played the winning fork Ne8+. I was puzzled why my engines were showing a draw score. But if you look back in the game, I believe the last irreversible move was...

6. .. e6 7. g4 h6 has been tried by quite a few strong players and looks pretty reliable, although this is actually a transposition to the Keres Attack (B81), which Black should generally avoid. Usually White goes 8. Be3. One example of this line: [Event "EU-ch rapid"] [Site "Katowice"] [Date "2017....

7. Nb3 (after 6. .. e5) is also a serious line and not so easy to counter. Black's best is probably .. Be7 (Be6 is less good). Then there are two main lines: 8. g4 h6! 9. Be3 Be6! and 8. Be3 Be6! 9. f4! Nc6! as in Stukopin-Dragun, Saint Louis 2018 Computer analysis can be helpful but it is also help...

How can we be sure it is the best move?

I posted multi-PV analysis. But it is always possible a deeper search will show something different.

--Jon