Implement a draw - Githubissues

apotapov / tafl

Android implementation of a Tafl game

Apache License 2.0

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Implement a draw #22

Closed apotapov closed 10 years ago

apotapov commented 10 years ago

The defending player has the ability to force a draw by surrounding the king such that it cannot be captured but move back and forth forever.

apotapov commented 10 years ago

When it is turn of either side to make a move and they are unable to move a piece.
If the King is at the side of the board and the attacking player cannot move him into a position where he can be taken.
If the King cannot reach a refuge square and the attacker cannot reach the King.
If the same position of all pieces arises three times, with the same side to move.

apotapov commented 10 years ago

Going to add a 5th condition: Too many moves. The threshold will be generous 100.

apotapov commented 10 years ago

Bumped move threshold to 300. Since we are not implementing PvP play, the condition of a draw is not as important.

Implementing 4 will be difficult because of all the possible combinations. So we'll skip that for now. I will file a separate enhancement bug for that.