Onitama chess-like abstract strategy boardgame

Onitama is a chess-like abstract strategy boardgame.
The game is played on a 5x5 board. Each player has five pawns, with the master pawn starting in the middle. At the begin of the game, 5 move cards are randomly selected out of the total of 16 animal moves. The goal is to capture the opponent's master pawn or to move on top of their master's starting position.

You can play against an AI with 3 difficulty levels, or 'pass 'n play' against another human.

Controls

Arrow keys, move the board cursor for pawn destination selection.
[o] z to switch between move cards.
[x] x to select a pawn destination.

Rules
During each turn the player chooses one out of two available move cards, and moves a pawn according to the chosen card. This move card will then be passed to the opposite player where it will become active next turn.
You can capture an opponent's pawn. By capturing the opponent's master pawn, or moving your master pawn to the opponent's master pawn starting space, you win the game.
Watch the short (3:24) instruction video on How To Play Onitama.

All movement cards

Credits
Thanks to @Krystman Pico Checkmate for the reference Chess AI. Find more about programming Chess AI on http:chessprogramming.org
Changelog
v0.5
Internal AI improvements: faster moves, position key, benchmarks
AI: purge bad moves, award PV
Logging bugfix
v0.4
Menu with opponent and difficulty selection
v0.3
Negamax with alpha beta pruning
Quiescence
Position and move evaluation
AI thinking indicator...
Take turns after each game
Game statistics
v0.2
Naive AI player
Bugfix: moves shown on top of own pieces
v0.1
Table with 16 cards
Use different indexes
Board as table
Place remove stone
Show mini board
Show opponent mini board
Show 5th card
Shuffle cards to begin with
Select active card
Rotate cards when playing
Show valid moves
Play move



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