40000 interactive chess tactics puzzles

[ogam]

http://www.ideachess.com/

- Completely free
- Over 40.000 checkmate and tactics puzzle
- Glicko rating system with players ranking
- Multiple solutions accepted
- Real time chess engine that evaluate your attempt
- For all tactics problems is specified where they are taken from (event, date, players, result)
- Every week new tactics puzzles from TWIC pgn files

[Mike S.]

It looks very good! Many features.

What is the engine?

I've just drawn a game against Level 2 by repetition. But there is no PGN or notation. Maybe registered users get a PGN.

[ogam]

The engine is BremboCE programmed by me. In level 2 the engine is limited to deep 2. For other levels registration is required but it's free and for every user I keep stats ragarding win, lose, and draw games against each level.
Games against the computer are not available in pgn, maybe in the future... now I'm focus my work on tactics and endgame training.
I'm glad that you like ideachess.

Gianluca

[Uri Blass]

unfortunately the site does not expect winning lines for some of the problems.

In tactics puzzle 12410
I played the following moves that lead to winning the endgame only to be marked wrong by the computer.

[Event "Computer chess game"]
[Site "URI-HP"]
[Date "2011.03.16"]
[Round "?"]
[White "Uri"]
[Black "Uri"]
[Result "*"]
[BlackElo "2400"]
[Time "13:11:37"]
[WhiteElo "2400"]
[TimeControl "40/7200:20/3600:1800"]
[SetUp "1"]
[FEN "5R2/1pq1rppk/7p/p1b4P/3p1PP1/PQ1N4/1P2P3/1K6 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "9"]
[WhiteType "human"]
[BlackType "human"]

1. Qd5 Re5 2. Qxf7 Qxf7 3. Rxf7 Re7 4. Rxe7 Bxe7 5. Kc2 *

[Uri Blass]

another annoying "wrong" solution and this time even the computer understand that I win the game
tactics 9511

[Event "Computer chess game"]
[Site "URI-HP"]
[Date "2011.03.16"]
[Round "?"]
[White "Uri"]
[Black "Uri"]
[Result "*"]
[BlackElo "2400"]
[Time "13:33:59"]
[WhiteElo "2400"]
[TimeControl "40/7200:20/3600:1800"]
[SetUp "1"]
[FEN "3r1rk1/p1p2ppp/5P2/4P1Q1/4B3/Pq6/1p4PP/R4bK1 b - - 0 1"]
[Termination "unterminated"]
[PlyCount "19"]
[WhiteType "human"]
[BlackType "human"]

1. ... Qe3+ 2. Qxe3 bxa1=Q 3. fxg7 Qd4 4. gxf8=Q+ Kxf8 5. Qxd4 Rxd4 6. Bxh7
Bd3 7. Bxd3 Rxd3 8. a4 Re3 9. e6 Rxe6 10. h3 Ra6 *

1...Qb6+ is also winning but the relevant line is a very simple win for black
and the computer even see a forced mate for black at the end of the line.

[ogam]

Hello Uri,

yes, with some problems with multiple solutions some alternative lines are not recognized as correct. Since on ideachess there are more than 40.000 tactics problems for me is impossible to spot them a priori so I count on players feedback that leave comments on the puzzle or give a low rate to it to decide to eventually remove the problem. I use the rating given by users also to improve the general quality level of the available puzzles.

Do you have suggestions for improve ideachess?

Thanks, Gianluca

http://www.ideachess.com

[rightrook]

Works pretty good....I was able to win level one.....

I had to update my Java program before I could get it to work.

Thanks...

The Lord bless you..!

Robert

[rightrook]

Suggestion...

When you find and play the right solution....instead of just "Ok"....

why not have "Correct"..(with also maybe a smiley face too).....

Just my idea...hope you like it...

[ogam]

Hello Robert,

yes I like the idea especially of the smiley face!
I've put it in the to do list!

Gianluca

[rightrook]

Hi Gianluca.......Thanks for the reply...I am glad you like my idea...



Good work on your new chess website...!!

Robert