Friday, October 06, 2006

Ct-Art Exercise 252

I am through exercise 252 in CT-Art, stopping there because I spent far too long on that problem. The solution I calculated actually did win a piece or the exchange, but the correct solution won a queen for a rook. It's a little disappointing that the program doesn't count winning a piece as correct, but the requirement to be perfect will be good for getting better.

Here's the problem in question:
Black to move

My solution was. 1. ... Qe4+, CT-Art gave 2. f3 as a refutation. My planned response to this move was 2. ... Nxd2 3. fxe4 Rc4 where I am attacking the rook and the bishop.

The better solution is 1. Rg3+ fxg3 2. Qe4+ and now black can take the queen free and clear.

CT-Art statistics:

  • level 10: 97% (110 problems)
  • level 20: 94% (142 problems)
  • elo: 2031

It will probably take me through the end of next week to finish level 20. Tomorrow's regular weekly update will include some comments on this weeks work at CTS.

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6 Comments:

At 6:08 AM, Blogger transformation said...

tonight i spent fifteen minutes on practice problem 533. sitting and staring. i knew that the g1 square was weak, but how to get at it????? then afterwards, we see the solution, oh how 'obvious'!

2009 elo @ 77%.

Let me know how Level Three goes, it really gets NASTY.

:) warm regards, dk

 
At 2:01 PM, Blogger SamuraiPawn said...

Screw the program! If you found an alterative to the main solution on your own, give yourself a pat on the back for your creative mind!

/Chris

 
At 3:31 PM, Blogger Loomis said...

I appreciate the pat on the back, but the point is that I am supposed to learn something from these problems. For that, it is best that overlooking any variation is punished. I just wish that once I got to a certain point in being unable to solve a problem I could give in and see the answer. Is this possible and I'm just missing something?

 
At 6:13 PM, Anonymous Samurai Pawn said...

Well Loomis, if I am unable to find the solution in CT-Art, I just right-click and first choose show markers, and if I still can't find it I choose game 5x5. If I still can't find the solution I just make wrong moves until the program plays through the whole thing. The you can click the annotations to the right and go through the problem ste-by-step. Maybe I misunderstood your question or maybe I'm just stating the obvious. Hopefully it will be of some help. :)

/CHris

 
At 6:15 PM, Anonymous Samurai Pawn said...

Oh and another thing. In the case you mentioned in the post. Isn't it so that the the people who made CT-Art overlooked your variation?

 
At 6:34 PM, Blogger Loomis said...

Yes, it seems they stopped calculating after f3, at least, that is where their variation stops. But since their line is significantly better than mine, I wouldn't actually call this an error on their part.

I guess I don't want to have to keep trying wrong moves if I can't find the solution. It would be nice if there was just an "I give up" button and then they show the answer. Thanks for suggestions.

 

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