Published on July 20th, 2009

Chess is often played with beautiful pieces. This is one of the reasons to start playing chess. We like the pieces and we like the game. The picture below illustrates some of this beauty.

Chess pieces
Chess by frankblacknoir

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Published on July 20th, 2009

I upgraded to WordPress 2.8.2 which fixes an XSS vulnerability. Comment author URLs were not fully sanitized when displayed in the admin. This could be exploited to redirect from the admin to another site.

Published on July 11th, 2009

I’ve upgraded this chess tutorials site to WordPress 2.8.1.
So far I didn’t experience problems, but I’m keeping my fingers crossed.
WordPress 2.8.1 fixes many bugs and tightens security for plugin administration pages. The admin pages added by certain plugins could be viewed by unprivileged users, resulting in information being leaked. Not all plugins are vulnerable to this problem, but I upgraded to 2.8.1 to be safe.

Published on June 14th, 2009

I have upgraded to WordPress 2.8, but it seems that this resulted in some problems with the chess diagrams and replayable games.
I’m trying to solve this.

Update: The problem has been solved.
I had to adapt the Show-FEN plugin. A new version of the Show-FEN plugin v1.4 can be downloaded here.

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Published on May 19th, 2009

The following diagram is a nice exercise about a chess position that looks rather easy at first sight. It’s White turn to move. Is this a draw?








White to move
Position after move 0
0 half-moves after last pawn advance or capture

It’s White’s turn to move, but Black will gain a tempo because of the check by f4+. So at first sight it may look like a draw, but as we will see White will be able to win this game.

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