That's because they use different algorithms.
Why do you expect them to give the same evaluation?
engines scores
Sort:
Because they are "Super Grandmaster" rated. They should evaluate the position accurately. In which case the scores should be the same.
Well even (super) grandmasters don't evalute positions equally.
Both grandmasters and top engines are not perfect and have different styles of play and thus evaluate most positions differently.
ok - but fritz was like +1.8 and houdini was saying no its only +0.5. So now I dont know which to trust.
Yeah, that seems like quite a big difference.
I guess if you let Fritz12 play out the variation, using the moves Houdini suggests, it will mostly adjust to Houdini's evaluation. If I'm well informed Houdini is much stronger, so would trust Houdini over Fritz.
T-Misha77 wrote:
ok - but fritz was like +1.8 and houdini was saying no its only +0.5. So now I dont know which to trust.
I don't think there is much use of engine evaluation if you don't understand why is giving it.
T-Misha77 wrote:
ok - but fritz was like +1.8 and houdini was saying no its only +0.5. So now I dont know which to trust.
______________________________________________________________________________________________
Houdini and Fritz have been programmed with different algorithms. Those algorithms take kdifferent mathematical/logical perspectives of the same position.
Regarding which to trust; trust your own brain by analyzing the results of both engines. When analyzing it is prudent to use the analysis and evaluation of 3 or 4 different chess engines.
Some positions they give vastly different scores. Some they give the same. Sometimes they move closer together as the analysis depth increases.
Can you post the position that provoked your question?
yes, it's from a game - how can I post the pgn.
Tal vs Fischer 1959/10/11 E93 34 moves.
After move 17 c5 f5 Fritz 12 says Tal is winning at +1.6 whereas Houdini 1.5 says it is only +0.5.
What the heck is going on - I even explored some variations myself.
Ziryab wrote:
Some positions they give vastly different scores. Some they give the same. Sometimes they move closer together as the analysis depth increases.
Can you post the position that provoked your question?
Tal vs Fischer 1959/10/11 E93 34 moves.
After move 17 c5 f5 Fritz 12 says Tal is winning at +1.6 whereas Houdini 1.5 says it is only +0.5.
How do I post the pgn?
This one?
That's it, thanks
T-Misha77 wrote:
yes, it's from a game - how can I post the pgn.
Tal vs Fischer 1959/10/11 E93 34 moves.
After move 17 c5 f5 Fritz 12 says Tal is winning at +1.6 whereas Houdini 1.5 says it is only +0.5.
What the heck is going on - I even explored some variations myself.
And what was your conclusion?
temp_ddg wrote:
And what was your conclusion?
total confusion
No other engine sees it - so it must be a secret between Fritz 12 and Tal
@T-Misha77 http://support.chess.com/Knowledgebase/Article/View/35/0/how-do-i-insert-a-game-puzzle-or-diagram-into-an-article-blog-or-forum-post
http://support.chess.com/Base/Search/Index
BTW GM Mednis makes no comment on your critical position in "How To Beat Bobby Fischer" but then again his annotations for the entire game are rather light. He appears to blame 12...Bf6? (TN) as the beginning of a slippery slope to defeat.
Thanks Nimzo Roy
it shows how confused the engines are by complex options
My first guess is that White's advantage grows as the analysis deepens. But there is often a lot more involved. Engines vary in their manner of positional evaluation.
I opened the position with three engines. Fritz 11 has greater depth and a higher evaluation for White. Engines are able to go deep faster with more aggressive pruning. Sometimes in complex positions, they prune a promising line.
Ziryab wrote:
My first guess is that White's advantage grows as the analysis deepens. But there is often a lot more involved. Engines vary in their manner of positional evaluation.
I opened the position with three engines. Fritz 11 has greater depth and a higher evaluation for White. Engines are able to go deep faster with more aggressive pruning. Sometimes in complex positions, they prune a promising line.
thanks for that - maybe there's something wrong with my pc.
Installed a new UCI yesterday for first time - Houdini and noticed it gives different points than Fritz 12 for the position.