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alberlie 66 ( +1 | -1 )
How to use Fritz Hi,

I would like to let Fritz analyze a certain position. So, I let him chew on it and make him give me the three highest rated variations.
Let's assume, I did that for about 30min, thus getting a relatively reliable result. Now, I want him to look at the three hightest rated variations _after_ those primary three choices.

Is there a way to tell Fritz to explicitely disregard all variations starting with 3. Nc3; Nd2 and 3. Be3?
That's something I wondered on a number of other occasions as well - imagine a closed middle game position where Fritz stubbornly insists on moving Rab8 Rba8 etc. Is there a way to make him think of something else?

greets, AA
cairo 47 ( +1 | -1 )
I understand your question, but I'll suggest you use your chess-intuition, as you said yourself the program, is stubbornly insist on moving a certain move, you as a human know better :-))
However if you don't trust you own skills, perhaps you can create the desired position and analyse from there, but always use your own intuition and common sense for the game.

Good chess ahead!

Best wishes
wschmidt 96 ( +1 | -1 )
Alberlie, It isn't clear to me why you don't just have Fritz display 6 sets of variations instead of 3 and then paste all 6 to the game. But if there's a twist here I don't understand, here's my suggestion.

I don't of a way to tell Fritz to ignore a possible move as it is doing its analysis. However, you can accomplish the same thing by doing the following: Instead of having Fritz display just the first 3 best variations, have it display the first 6. Then, when you've let it run as long as you want, paste all the variations to the game. Then manually delete the first 3. Then run the analysis for the remaining 3 (variations 4-6) individually for the desired length of time.

Again, if you're running Fritz for half an hour on six variations, I think that if you just paste those six into the game and look at the last three you'll have a pretty good analysis. I don't know if you'd gain that much more by doing those extra steps. Again, maybe I've missed a nuance in what you're trying to do though. ws

alberlie 88 ( +1 | -1 )
well, part of it is probably purely "academic" interest - if I can "control" something more than I do already, I'd like to know about it ;o)

But there actually is a somewhat more relevant point to it: Fritz doesn't distribute it's calculation time evenly but based on the strenght of the variations. Obviously it's highly unlikely that sacing the queen on move two is going to create positional benefits that will justify the material loss in the long term. Therefore, candidate moves involving a queen sac are given very little calculation time (but they are given some, nonetheless). Therefore, in a position where there are a wide number of plausible moves, I would like to be able to cut down on the number of variations, thus making computing power available for the next candidate moves.
But I guess it _is_ of somewhat "academical" interest...
wschmidt 6 ( +1 | -1 )
Ah, I see.... I think the multi-step manual version is the way to go then. ws
mattdw 27 ( +1 | -1 )
While we are on the subject of fritz - is it actually possible to delete games in the database? Nothing happens when I try to delete them in mine so I have duplicates of every game I have played with and without analysis - and they aren't sorted chronologically...grr.
thunker 20 ( +1 | -1 )
mattdw Mark each game you want to delete via the "edit"-"delete" option, and then go to "tools" and select "database" -> "remove deleted games" to permanently remove them from the database.
thunker 8 ( +1 | -1 )
Just a note The more lines, or variations, you select for Fritz to analyze, the slower it will run.
alberlie 25 ( +1 | -1 )
thunker... that is exactly the reason why I would like to specify exactly which lines it should analyze. And a bit more specific than "the first six choices" or so. But apparently, this seems impossible. Maybe some other engine can do this?
mattdw 14 ( +1 | -1 )
Thanks for the suggestion Thunker, but I couldn't get it to work. I'm running Fritz 9 but I haven't updated it yet though as it wont let me connect to the server due to firewalls.
wschmidt 53 ( +1 | -1 )
a clarification question.... Thunker, when you say "The more lines, or variations, you select for Fritz to analyze, the slower it will run" are you saying that if I click on the "+" sign and increase the number of analysis lines displayed when Fritz is looking at a position, it will run slower? I've always thought that was simply a question of how much of Fritz's analysis was displayed on the screen since the engine has to rank its choices internally anyway. If that is not the case, I'll change my approach, because I often have several lines displayed just out of curiosity. ws

alberlie 11 ( +1 | -1 )
It doesn't matter as long as you only have three or so displayed - but if you increase it to more, say six :o)) or so, it slows it down.
thunker 31 ( +1 | -1 )
wschmidt I used to think it was fixed too until my teacher told me otherwise. I did a little test and going from 2 to 3 even slows it down a bit. I rarely use more than 2 if I want to do a deep analysis of a specific position in a past game. Of course, for quickie stuff more lines don't hurt a whole lot.
thunker 27 ( +1 | -1 )
alberlie I have Shredder also but I think most all the ones that ChessBase has bought out pretty much run under the "Fritz" interface - only the engine itself is different. So I doubt any of the "ChessBase" backed ones won't do what you're wanting....
Don't know about any others...
dysfl 79 ( +1 | -1 )
My method For mattdw's question, you can specify if you want to replace the existing game with the anlalyzed one or create a new one. I usually select replace. The exact field name might not be 'replace', but you will have no trouble to find it. Also, while you're reviewing the Fritz-commented game, you can add your own comments or delete unnessary lines, then 'ctrl-R' will replace (update) it.

For Wschimidt's question, I think if you ask more variations by pressing '+', it will run slower and give you more deeper analysis on those top x variations. Try it yourself. I change the number of variations when I liked a specific variation but it was not in the top 5 after, say level 13. I press '+' several times and wait for the completion of level 13, sometimes it makes to the top 5. However, it should be noted that the numeric evaluation varies a little in each run.