More Chess & More than Chess: on-line supplement

This page allows you to practice your technique for checkmating a bare King. Select the two pieces you want to play with through the buttons, and then press 'Calculate'. Then wait until the program has finished generating the end-game table. Then you can start playing: just move a piece of the side you want to play with, and the computer will reply with the best move of the other player.

This applet is exclusively for 3-vs-1 end-games. For practicing 2-vs-1 end-games, go here.

3 vs 1 checkmating

graphicsDir=bpainter/ whitePrefix=w blackPrefix=b graphicsType=png squareSize=50 useMarkers=1 enableAI=0 symmetry=none promoZone=0 maxPromote=0 Fairy piece:X:N:knight:a1 Fairy piece:Y:N:knight:b3 King::K:king:b2,,d4

   

piece 1:















piece 2:

Generating end-game table; Please wait.

For trying other board sizes (maximally 108 squares):
Files: Ranks:
Type of board:


Rule variations:

Design your own piece

In the pane below you can define moves of a piece by clicking the squares it should be allowed to move to. First click defines a leaper move to the square. A second click would convert this to a slider/rider move that repeats that step/leap. A third click would remove the move again.

To limit the range of a slider you can click the first square along its path that it should not be able to reach. Clicking on the piece takes away all its moves, and thus clears the entire pane. After you are satisfied with the move, you can assign it to one of the pieces through the buttons on the right. Note that you can specify divergent pieces by changing the move before you press the button a second time; normally you would just press it twice, though.

Assign move in panel to piece:
Captures and non-captures must be specified separately.
Piece 1:
Piece 2:
Make EGT for the new pieces:

Statistics table

The statistics table indicates how many positions exist that are mate in N (with white to move) and mated in N (with black to move), where the number of full moves N is given in the third column. The bottom row gives the total of the columns as a percentage of all possible positions. In generally won end-games the first column would sum up to nearly 100%, in generally drawn end-games the second column would sum up to about 0%.