Bagh Chal Classic
Four tigers, twenty goats, and an opening book that does not forgive.

A careful digital edition of the traditional tigers-and-goats board game. The rules are implemented from the commonly played regional variants, each selectable before a match, rather than flattened into one house rule.
The opponent runs a small alpha-beta search with an endgame table for the closed positions, which gives a beginner tier that plays plausibly rather than randomly, and a hard tier that is genuinely difficult.
Regional variants
Selectable rule sets instead of a single flattened version.
Real search
Alpha-beta with an endgame table — the easy tier plays badly on purpose.
Pass-and-play
Two players on one handset, no account and no connection required.