I've found Gnu evaluates desperation situations very poorly.
Specifically, if an opponent is rolling off and you are racing to get
one piece off to avoid a gammon, Gnu mis-evaluates moves.
From this position:
GNU Backgammon Position ID: GreDA0DbbgcBAA
Match ID : AQG7AAAAAAAA
+12-11-10--9--8--7-------6--5--4--3--2--1-+ O: GammonBot_II (Cube: 2)
| X O | | O O O O O O | 0 points
| X | | O O O O O O | Rolled 66
| X | | O O |
| | | |
| | | |
^| |BAR| | 5 point match, game 1
| | | |
| | | |
| X | | X |
| X X | | X X |
| X X | X | X X X | 0 points
+13-14-15-16-17-18------19-20-21-22-23-24-+ X: You
My moves of 63:13/10, 13/7, 31:8/5 7/6 and 65 10/4 8/3 were rated very
bad, bad, and doubtful.
How can this be?
My sole goal at this point is to avoid a gammon (which I managed to
do, btw). Any move I made other than the ones I did would have
resulted in a gammon... (i got one piece off).
Any thoughts?
Thanks!
Michael McKinnon
(Match attached as jellyfish file)
5 point match
Game 1
GammonBot_II : 0 You : 0
1) 12: 24/23 13/11 45: 13/8 24/20
2) 44: 13/9 13/9 9/5 9/5 62: 25/23 24/18
3) 36: 23/20 13/7 54: 25/21 23/18
4) 32: 25/22 6/4 25: 25/23 23/18
5) 54: 22/18 18/13 46: 18/14 14/8
6) 22: 25/23 24/22 22/20 6/4 15: 18/13 8/7
7) 13: 8/7 6/3 56: 13/7 13/8
8) 33: 13/10 13/10 10/7 8/5 Doubles => 2
9) Takes 13: 8/7 6/3
10) 12: 23/22 5/3 46:
11) 52: 20/15 10/8 35:
12) 13: 15/14 14/11 41: 25/24 7/3
13) 25: 25/20 11/9 54: 8/3 6/2
14) 33: 7/4 7/4 4/1 4/1 63:
15) 54: 20/15 15/11 15:
16) 33: 8/5 8/5 5/2 5/2 64:
17) 56: 11/6 20/14 46:
18) 35: 14/11 9/4 44:
19) 66: 11/5 6/0 6/0 6/0 66: 25/19 19/13 13/7 13/7
20) 36: 5/0 3/0 63: 13/7 13/10
21) 33: 5/2 4/1 4/1 3/0 31: 8/5 7/6
22) 26: 5/0 2/0 65: 10/4 8/3
23) 14: 2/1 4/0 14: 8/4 7/6
24) 23: 2/0 1/0 53: 7/2 7/4
25) 23: 1/0 1/0 21: 7/6 2/0
26) Doubles => 4 Drops
Wins 2 points
Game 2
GammonBot_II : 2 You : 0
1) 15: 13/8 24/23 54: 24/20 13/8
2) 45: 24/20 13/8 33: 8/5 8/5 6/3 6/3
3) 24: 25/21 23/21 34: 20/16 16/13
4) 61: 13/7 8/7 32: 13/10 10/8
5) 11: 8/7 6/5 6/5 6/5 13: 24/21 6/5
6) 13: 5/4 7/4 15: 25/24 13/8
7) 23: 13/11 13/10 42: 24/22 5/1
8) 46: 10/6 11/5 55: 8/3 13/8 13/8 13/8
9) Doubles => 2 Drops
Wins 1 point
Game 3
GammonBot_II : 3 You : 0
1) 24: 8/4 6/4 54: 24/20 13/8
2) 21: 13/11 6/5 63: 25/22 24/18
3) 11: 8/7 6/5 4/3 4/3 33:
4) 41: 13/9 11/10 54: 25/21
5) 64: 10/4 8/4 46:
6) 33: 24/21 13/10 10/7 9/6 63:
7) 44: 24/20 20/16 13/9 9/5 52: 25/23
8) 23: 13/11 5/2 15: 25/24
9) 62: 7/1 16/14 43:
10) 63: 11/5 5/2 54:
11) 52: 6/1 7/5 44:
12) 35: 21/18 18/13 14:
13) 52: 14/9 13/11 15:
14) 32: 11/8 5/3 16:
15) 43: 9/5 8/5 21:
16) 31: 5/2 5/4 34:
17) 43: 4/0 3/0 61:
18) 34: 6/3 6/2 43:
19) 14: 4/3 4/0 16: 25/19
20) 46: 5/1 5/0 34:
Wins 3 points and the match
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