basic-computer-games/23 Checkers

Checkers

As published in Basic Computer Games (1978) https://www.atariarchives.org/basicgames/showpage.php?page=40

Downloaded from Vintage Basic at http://www.vintage-basic.net/games.html

The file checkers.annotated.bas contains an indented and annotated version of the source code. This is no longer valid BASIC code but should be more readable.

Known Issues In the Original BASIC Code

• If the computer moves a checker to the bottom row, it promotes, but leaves the original checker in place. (See line 1240)
• Human players may move non-kings as if they were kings. (See lines 1590 to 1810)
• Human players are not required to jump if it is possible.
• Curious writing to "I" variable without ever reading it. (See lines 1700 and 1806)