Bagh Bondi means "tiger imprisoned" in Bengali. It is played on a board of a square lattice with triangular extensions, drawn on the ground or a piece of cloth. The goat player wins by immobilising both tigers rather than by capturing them.
Variant implemented
Bengali Bagh Bondi on the cross-and-triangles board: 2 tigers vs 20 goats, drop phase then movement phase, tigers capture by short jump.
Board and pieces
A 5×5 lattice with a triangular "hill" attached above and below — 31 points.
Setup
Two tigers start on the apexes of the two hills. The goat player holds 20 goats.
Turn
The goat player places a goat on any empty point, one per turn, until all twenty are on the board; after that goats move one step along a line. Tigers move one step or jump.
Capture and scoring
Tigers capture by jumping an adjacent goat to the empty point beyond.
Win condition
The tigers win by eating six goats. The goats win by trapping both tigers so neither can move — hence the name, "tiger imprisoned".
Draw condition
A long stretch with no capture ends the game as a draw.
Special rules
Goats cannot capture and are never removed except by a tiger. Their only weapon is the wall they build.
Computer opponent
Alpha-beta with jump-first ordering, depth-capped during the drop phase.