Yes, I also find I have to drag myself away from it (proof: mouse claw scratches on my desk) in order to get anything done (okay, much of “anything” is procrastination anyway, but … ).

And meanwhile it estimates my rank to be “between 15.4 Kyu and 13.5 Kyu” <sob>

Greetings, Tom

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This is fine if you're evaluating a whole game, but when you are evaluating a position as open as a fuseki, you can't calculate all possible variations to ensure that a move is a winning move, keeps the game in contention, or a losing one easily.

I think it would make more sense to classify a different problem's various answers by rank. A 10k needs to play in the right corner, a 5k needs to discriminate between pincer and extension, and as skill goes up, finer distinctions are made.

This doesn't seem to address the 'fuseki' problems that primarily seem to address how to continue a particular joseki, though.

Wonderful tool, I am impressed!

I do notice that sometimes when my choices are considered wrong, it looks a lot like that move is just not current fashion.

Can you say what the minimum sample size is? How often does a position have to appear in a game before you include it in your test set?

It might be interesting to extend your game record set to include strong amateur records, e.g those from KGS: http://www.u-go.net/gamerecords/

You could then mark moves played by strong amateurs (but not by professionals) as "not wrong". If a player can find KGS 6d+ level moves, I would consider that quite good, even if they do not occur in professional play.

I have had a similar experience.



What about making this an option that the user selects? For example, if I want to practice "modern pro fuseki", then I can set that in my preferences. Then maybe the game collection only includes recent pro games. Or if I want to include "all pro games", "6d+ games", etc., the sample set would be selected accordingly.

This might be nice, because to a 5k, it would be great to play at amateur 6d level, but if a 7d player is playing, he might only be interested in pro moves.

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be immersed

well, at least add a small delay so the user can see that he actually got a correct answer. It switches so quickly, it leaves the user wondering what just happened.

I'm with Oota on this - fast switching is what makes it so addictive. If nothing seems to happen, and you just flow to the next board, then clearly, you got the last one right. That's quickly internalized.

But the same thing happened when I got a wrong answer...

I feel I immediately forget the previous position when it suddenly disappears, and most of the time I want to spend a little while looking at the other options. Going back via the link each time gets old fast. How about a button to toggle the behaviour according to preference? Fast mode ON -> current system. Fast mode OFF -> click anywhere on the board or an arrow key to continue. I'd love to have this option.

Otherwise, nice and quick improvements!


One more suggestion comes to mind. The scrolling text on the right: While the fading is a nice touch, I think it would be better to have the brightest part always at the top, and then replaced with the new text (and the previous text block becomes shaded and moves down, etc). This way the beginning of a paragraph always stays in the same place, while currently it's moving around at the bottom. --> Easier for the eyes.

Bug report:

When I get an answer right, then click "possible answers" and then click "some recent pro games" the games listed do not show the position from the problem, but rather positions from the next problem.

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Patience, grasshopper.

You sure it's not just in different orientation? Also make sure you have latest version by refreshing the page, only added today the feature that it opens up the game the correct move.

Finally make sure you clicked the correct link, it's possible to click "some recent pro games" from a different different position than what showing.

Here's what I've been doing.

1. answer the problem correctly
2. click the bottom "possible answers" link
3. website responds with:



4. From that text, appearing at the bottom of the page, I click the "some recent pro games" link.
5. The go4go site opens in a new tab, and shows a game that does not include the original position.

BTW. How do you determine what is a meaningful challenge for whom?

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Patience, grasshopper.

Thanks for the detailed report. Bug located and squashed.



Users who are ranked weaker than the lower limit will fail to find correct answer to it over 95% of the time. Users who have been ranked stronger than the upper limit will find correct answer over 95% of the time.

Anyone here who can confirm that the chinese translations are working ok?

daal, I checked the go4go links and they work as expected for me. One possible reason you are not getting to the position that matches the fuseki pattern is that you are using the Eidogo player on go4go. If you switch to the Go4Go player, everything should work. You only need to do this once and your preference will be remembered.

I wonder, on how many games generally the moves are based. In most cases I get the message "The correct answers are based on 1 professional games" or "The correct answers are based on 2 professional games". Attached you find an example, three stones on the board and based on two professional games. One or two games seems a very poor game base to learn from.

I tried this the day of OP and wow, there is very nice improvement as the database has grown.

So are accepted moves only from professional play?

edit: Chrome won't let me sign up. I get a security error, has anybody else had problems?

edit2: what does My guess is that those are answers that are commonly given but do not appear in the professional database?

It tells you what the minimum rank is for accepted moves, but for now those shown as correct should be based purely on pro moves. While the uncertain one (shown more transparent) might contain some data taken from strong users (not strong according to how they rate themselves, but how the site rates them), but even they should for the most part be based on pro moves.

Are you sure ranks are updating? I only answered ~40 problems but my confidence interval stayed exactly the same even on 15+ win streaks. The lower and upper intervals converged and never moved again.

Ranks are updating. I was in the 5.2 kyu area for a few days, then suddenly it changed and now I am somewhere in the 2.8 kyu area.

Oota, could you redirect the ootakamoku.com naked domain to www.? It's app-engines/google sites error page by now

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