Dao is a modern game, invented by Ben van Buskirk & Jeff Pickering and published in 1999
The rules are quite simple.
How to win ?
1. Arrange your pieces, both players have 4, in a horizontal or vertical line.
2. Arrange your pieces in a 2x2 square.
3. Occupy all corners.
4. If 1 of your pieces is in a corner and is totally blocked by opponents pieces, you also win.
The ways of moving:
Pieces move until they reach a position where they are blocked by a piece or the edge of the board. So one must put the piece in such a position. A piece can move orthogonally as well as diagonally.
I've solved it.
It is a draw when both players play perfectly.
I've demonstrated this by creating a program which plays perfect.
Interestingly, the deepest position was a mate in 11, which can be played as well.
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