applet supports player versus computer and player vs. player mode,
and optionally computer vs. computer.
To move a piece click on it, It will be backlit in orange, and then
click on the target square. If there is a forced capture elsewhere,
then the piece will be backlit in blue
The features of this applet include:
- Plays standard checkers: forced captures, multiple captures.
- Minimax algorithm with alpha-beta pruning
- Robust interface with support for 0/1/2-player modes
- Randomization of moves: the computer player does not repeat games
- Automatic search deepening: when a forced move is detected,
that variation is automatically searched one ply deeper
Note: This Java
version of Checkers Game may not display or work properly in some
browsers, due to the changes in certain Java engines.
It does work fine in Internet Explorer 5 (SP3).
Sung Ha Huh
the authors of this checkers Java applet
" We implemented forced and multiple captures because this
is how checkers is played seriously. Leaving these features out
would be like coding a chess program without allowing pawns to
be pushed two spaces, en passant and underpromotion. The
game may look the same in the beginning, but play is highly crippled.
This made for most of the problems in the implementation, since
bugs were difficult to find. We are very proud of the fact that
we implement forced captures for the player, and that the game
engine makes captures when they are possible.
the case of multiple captures, the interface is intuitive for
the player, since he will be able to click on all the intermediate
squares. The background color of the checker after one capture
allows him to see easily that a further capture is possible. Some
implementations we have seen require right clicks of the mouse
which is difficult for the player to keep track of.
will only consider moves to be complete in the case of multiple
captures if the 'active' checker, that is, the checker that has
already captured, has no further captures. Therefore it will not
terminate multiple captures halfway because that would be illegal."