Mouse Click on the chessboard to place the Queens (There may only be at most one queen in any row, column or diagonal line of squares). You can try to race with your computer to see who get a solution first. To remove a queen, just click on it. Or, click on the Skull to clear the chessboard and restart all over again.
Developed using IE5.0 and JDK 1.1.6
Last Revised on 18-12-1999
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Technical Notes: If you resize your browser during the initialisation of the applet, the applet may have an improper layout. Try the refresh/reload command/button on your browser to solve the problem. This applet use the same algorithm as the Pentominoes applet, but the complexity of this puzzle is far less and therefore it is possible to search for all the solutions in a reasonable amount of time.