TalkChess.com

Isn't that strange? Without underpromotions the mate would show up earlier. Also zugzwang doesn't take part in the mating line.

Isn't it more likely that some White move gets pruned or reduced, so that it even takes a deeper search to discover it?

Hello Olivier,

would it be possible to substitute the old version of Kurt (KURT 271009_ja, number 118) to a newer one? It can be found here:

http://home.arcor.de/steve-o13/kurt/kurt_0_9_beta.zip

Hi Don. I tried Rybka 3 on a Q6600 and Rybka hadn't a clue. Could you test it with Rybka 3 and 4? My Rybka 3 got it a depth 13. Stockfish 1.8 did only see it after it is shown 1.Nf6+. Same with my own engine. May I say that this is a really sick mating line after 1.Nf6+ Kg6 2.Bc2+ Kh5 3.d8Q ... two...

Hi Don. I tried Rybka 3 on a Q6600 and Rybka hadn't a clue. Could you test it with Rybka 3 and 4? My Rybka 3 got it a depth 13. Stockfish 1.8 did only see it after it is shown 1.Nf6+. Same with my own engine. May I say that this is a really sick mating line after 1.Nf6+ Kg6 2.Bc2+ Kh5 3.d8Q ... two...

Same link: http://cap.connx.com/chess-engines/new-approach/kurt_0_9_beta.7z now has a PGO binary in it. It's only about 4% faster. That's still incredibly faster than the original one. So mostly this should be because VC++ Express can't do 64 bits. Apparently most of this speedup should be the bitb...

Geez,

your binary is almost twice as fast on my laptop as mine... well, I'm just using VC++ Express so I can't compile for 64 bits...

Or were your minor tweaks actually big tweaks?

Many thanks anyway, especially for pointing out yet another bug.

Hello everybody, it's been a long time since I've touched my engine, but recently I lay hands on Kurt again, and at least now I've got it to a point where it's giving me beating in blitz games. It also beats the old version but still doesn't stand much of a chance against the engines shipped with Ar...