Tactics trainer problems, # of Attempts
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It would also be nice to see # of attempts when you look at a problem. For example, you click the problem ID from your recent problems and a window comes up with the problem in it. You can click through the moves and you can see the problem rating and average time. It would nice also to see the # of attempts and the pass rate.
Feb 2, 2008
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#4
The # of attempts is correct. And yes, it's because there is a huge skew, we have LOTS of VERY hard problems in the database, rated over 2000:
http://www.chess.com/tactics/problems.html?sortby=rating_hard
You can see that almost all of these only have 1 or 2 attempts.
It's a little concerning that there is such a huge skew, I hope everything is ok with the system.
I noticed something else that doesn't make sense to me. I looked at the problems sorted by highest rating first and clicked through to see how many high rated problems there are. There appear to be a few thousand problems rated over 2000 with just a couple of attempts and a few thousand problems rated right at 2000 with no attempts. This isn't reflected in the problem rating graph. I guess this graph is only for problems with a significant number of attempts? There seems to be at the moment something less than 1000 problems represented in that graph?
last_file, it's not the shape of the graph that I was talking about. What didn't make sense is that according to the graph, most of the problems are < 2000, but if you look at the list of problems, most of the problems are > 2000.
Feb 6, 2008
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#7
That's correct...we only look at problems with at least 20 attempts. Anything less and we assume the rating on the problem is not yet accurate enough for the stats or graphs. I think what I'll do is run a query to update all problems with 0 attempts and rated 2000 or higher and bump their ratings down to 1800. However, from my experience, most of these problems ARE very difficult, and deserve the 2000+ ratings.
Feb 6, 2008
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#8
hrmm. it might be that only problems with a certain # of attempts are shown. i'll ask jay...
Feb 6, 2008
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#9
Loomis wrote: It would also be nice to see # of attempts when you look at a problem. For example, you click the problem ID from your recent problems and a window comes up with the problem in it. You can click through the moves and you can see the problem rating and average time. It would nice also to see the # of attempts and the pass rate.
Also don't know if you noticed but I added all of these as well. I also now show your score clearly upon finishing a problem so that your rating adjustment makes a little more sense.
In case anyone thinks I'm just a complainer: Thank you jay!
The tactics trainer is a really nice feature, one worth paying for once everything is ironed out ;-). Good luck making it the best it can be.
Feb 6, 2008
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#11
we're right now preparing thousands more tactics! and, we will also be adding in the option to see the text of the computer analysis :)
erik wrote: ...we will also be adding in the option to see the text of the computer analysis :)
Erik, when you mention the option of seeing the text of the computer analysis, that helps to explain why the certain moves were made? Boy, that would be very cool! I have done a few of these puzzles on other sites, and not always followed why different moves were done.
When viewing the tactics trainer problems info (http://www.chess.com/tactics/problems.html) the second column is labelled "Attempts". I thought this would be the number of times a particular problem has been attempted, but these numbers are in the hundreds (for the lowest rated problems) while the average number of attempts is 8. Is there really this huge skew in the distrubution of number of attempts?