Nine Men's Morris

A Nine Men's Morris (and its variants) offline game with basic features and a Flutter UI.

Rules:

* A player who aligns three of his pieces on a board line has a mill and may remove his opponent's piece(s).

* Any player reduces to two pieces and has no option to form new mills and thus loses the game.

* If a player cannot move one of his pieces (is locked up), he has lost the game.

Features:

* Support rule variants, such as Nine Men's Morris, Twelve Men's Morris, "flying" rule, or no "flying" rule.

* Play against the AI, or play both sides.

* Adjustable playing strength.

* Import/export move list. Support importing PlayOK and GoldToken move list.

* Highly configurable.

* Color themes.

* Support accessibility.

* Supports 45+ languages, such as English, Persian, German, Hungarian, Russian, Arabic, Czech, Romanian, Spanish, Portuguese, French, Italian, Polish, Turkish, Chinese, Japanese, Korean, Hindi.

Some strategy tips for beginners:

* Playing on the cross points because they offer more way mobility to the pieces.

* Corners are weak as the player can only move in fewer directions.

* Giving the piece space to move.

* Do not make mills straight away. Usually, the first player to make a mill in the placement phase will easily get blocked.

* Black has an advantage because it gets to place the last piece strategically.

* Double attacks - be aware that players can attack two points at the same time.