Hi Don,Don wrote:When you see such a position, put it in a file with a description and fen and send it to us please when you get a few. We are only interested if the move represents a real blunder, not a move that loses in a losing position anyway.MM wrote:Thank you for the link.Mike S. wrote:The following test result indicates the opposite:MM wrote:P.S. Don't forget the tactics, it is the weak part of your engine.
http://rybkaforum.net/cgi-bin/rybkaforu ... pid=414852
Most results are from four cpu cores, but we find Komodo 4's result on one core only (64/100) not far from e.g. Zappa Mexico II (65) or Rybka 4.1 (70) which used four cores each. Komodo 3 scored even better: 71/100.
An engine which is known to have both tactical style and tactical strength, Spark 1.0 (but it's clearly weaker than Komodo overall, in games) solved 79 on four cores.
The test is not public but I think it is quite difficult. The best result so far was 90/100.
In my opinion this list in pretty unsound mainly for 3 reasons:
1.It maxes a mix between 1 core and 4 cores engines.
2. You can't be sure that if an engine solves a certain number of tests with one core, will be able to solve many others on 4 cores.
3. Not all tactical tests are identical. I mean, one engine can be able to solve a certain kind of tactical test and not able to solve another, it could depend by the ''theme'' of the test.
Anyway i'm pretty confident regarding what i wrote because i watched with my eyes hundred games of Komodo 4 (that i bought) and saw its tactical weakness, at least against Houdini.
I simply made a comparison between the strenght in tactics and the strenght in positional play of Komodo, so i see that the problem of Komodo is mainly in tactics.
Best Regards
We have had too many people send us examples that did hold up by this measure, they would just show us positions where Komodo was already losing and then Komodo would play some move that would be met by a spectacular response - making the move look like a terrible blunder (but it was already in a deal lost position.) So please make sure you have a legitimate blunder and not just a move that you don't like. There were 2 or 3 shown on this forum and I refuted them all by showing that ALL moves lose.
The converse happens too, someone showed us a position where Komodo "missed" the winning move - but there was nothing wrong with Komodo's move, it was just not as spectacular as the more obvious winning move.
But we are always interested in legitimate examples so please feel free to bundle up some examples and send them to us.
generally speaking i understand your statement but i partially don't agree with your reasoning.
I mean, when Komodo is in a bad postion (lets say -0.60) and doesn't see anything and moves and its opponent moves scoring (-2.10) for Komodo, well in this case i call it tactical weakness unless Komodo had no other moves to prevent the ''killer'' move of its opponent.
I mean, when i talk about tactical weakness, i dont mean missing spectacular moves when many other moves win the same. I mean NOT seing winning move when there are and moving something else, but if this ''something else'' in not clearly winning then i call it tactical mstake.
I mean, it's not question of ''choice'' of the move , Komodo or any other engine does see or doesn't see. It's not particularly relevant if it chooses the 2nd or the 3rd winning move but it misses it, it's a tactical mistake.
More, i think it's not clear the concept ''lost position''. A position can ''appear'' lost (let's say -1.50) and Komodo plays and its opponent moves scoring -3.90. In this case, perhaps the position was already lost but perhaps it wasn't. What really makes the difference is if Komodo sees or doesn't see the killer move.
And more, tactical ability is also to be able to drive the position to have a huge power on a certain side of the board, if it is positionally correct, even much before any dramatic tactical conclusion (like Alekhine used to do). Not only see or not to see the final tactical shot.
When i have some time, i will run a match against Houdini and send you all interesting situations i found but i have Komodo 4, so i really don't know how much helpful it could be because you already own a much stronger version under works.
Thank you
Best Regards
