Thursday, June 16, 2016

My new web site with chess puzzles, ChessPuzzle.NET starts beta today


Go to and register to get chess puzzles corresponding to your level.

  • All positions are selected from real tournament games.
  • Puzzles include openings, middle games, and end games.
  • Review the solutions, including the tournament game the puzzle is based on.
  • Try other moves on the analysis board and get help from an in-browser engine.
  • Play on PC, tablet, or smart phone.

Disclaimer: The web site is in beta, so sometimes things might go wrong, or are not yet perfect. Your feedback will help to improve

Monday, November 12, 2012

ICCF congress in South Africa

I recently attended the ICCF congress in South Africa.


A football game, where the players were tied to ropes, so they can only move to the left and right. The players are arranged similar to table football. Young and old players can participate in the same game, and it seemed to be great fun.

The shopping center was just like the ones everywhere else, but they had a huge playground on the roof, including a grand stand for the parents.


There were purple trees everywhere. These are actually Jacaranda trees imported from Brazil, and they were in full bloom.


A weaver bird and its nest, with the entrance at the bottom. Another bird, called bulbul.


Some more wild animals: A giraffe, zebras, a young wildebeest, elephants, and waterbucks.

ja 011 - Kopie

I got my senior international master certificate and silver medal.

Wednesday, August 10, 2011

International Correspondence Chess Master

At the recent ICCF congress in Järvenpää, Finland, I received the title of International Correspondence Chess Master.


Sunday, November 07, 2010

International Chess Live for Windows Phone

I just published my first application for a phone, International Chess Live on the Windows Phone 7 market place. International Chess Live allows you to watch live chess on your Windows phone.

The live coverage is brought to you by my good friend Mark Crowther for The Week In Chess and the London Chess Centre.

If you already have a Windows phone, you can download International Chess Live here.

Here are some screenshots:

Monday, October 11, 2010

More surface development

I have been contracting with syzygy on several Microsoft Surface projects. For Fujifilm we developed a multi touch photobook application, which was shown at Photokina 2010:

I developed the photobook interaction, and the algorithms for automated layout.

Sunday, September 12, 2010

Mobile chess survey

Chess friends have asked me time and again about having versions of my chess software on various mobile devices.

This includes my Silverlight chess board, which is used for live transmission of chess games, and to replay chess games which can include annotations and variations, and my work for the ICCF and on Xfcc to access correspondence chess games.

To get an estimate on how big this interest is, I created an online survey on mobile chess.

Sunday, June 13, 2010

Website update

Just updated the website. Moved the blog to a custom domain, as blogger no longer supports FTP publishing. Included the Xfcc and Silverlight chess board content under the same header. Thanks to Kirsten for the header.