If first 4 moves is placing at star point, move 5 temporarily use depth 1 search
in order to make sure white player do not attack and try to block black.
(For 9ms, star point is b4/d6/f4/d2)
This changed the white's moves.
For nine men's morris:
If first 4 moves is:
1. b4 d6
2. f4 d2
Next move, white will place at a4/c4/e4/g4,
now changed to place at d7/d5/d3/d1
If first 4 moves is:
1. b4 f4
2. d6 d2
Next move, white will place at b6, it is not wrong,
now changed to place at d4/g4/d3/d1, it is not wrong too.
Test result:
Play against Perfect Database:
400 games.
There is no significant change in the Draw rate.
Play 90 games against the pre-improved version:
White (New) Vs Black (Old)
White's win rate increased to 20%, equivalent to Black's winning rate
Originally less than 10%.
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