Mul-Mulan is the Indonesian form of the morris family, whose boards have been found scratched into stone from Ancient Egypt to medieval Europe. Three concentric squares joined by cross lines give twenty-four points; each completed line of three lets you remove an enemy piece.
Variant implemented
Javanese Mul-Mulan (nine men’s morris family): 24 points, 9 pieces each, drop phase, slide phase, "fly" when reduced to three; completing a mill removes an enemy piece.
Board and pieces
Three concentric squares joined by cross-lines at the midpoints of their sides — 24 points and 16 possible mills.
Setup
Nine pieces each, all in hand.
Turn
Players alternate placing pieces until all eighteen are down, then move one piece one step along a line to an adjacent empty point.
Capture and scoring
Completing a mill — three of your pieces in a line — lets you remove one enemy piece. You may not take a piece that is inside a mill unless every enemy piece is in one.
Win condition
Reduce your opponent to two pieces, or leave them with no legal move.
Draw condition
Threefold repetition or a long stretch with no capture is a draw.
Special rules
A player reduced to exactly three pieces may "fly" — move to any empty point rather than only an adjacent one.
Computer opponent
Alpha-beta. The evaluation counts material, mobility and near-mills (two of three with the third point empty).