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[Bug-gnubg] Optional redouble, or is it automatic
From: |
Ian Shaw |
Subject: |
[Bug-gnubg] Optional redouble, or is it automatic |
Date: |
Mon, 9 Sep 2002 11:10:20 +0100 |
Why is this type of position called an "optional redouble"? Surely the
redouble is automatic. I guess the 2-ply analysis is looking ahead and
automatically doubling on the next roll so it sees no loss of equity.
GNU Backgammon Position ID: 2W4AAGdsbRMBGA
Match ID : AgGgAAAAEAAA
+-1--2--3--4--5--6-------7--8--9-10-11-12-+ O: mlp (Cube: 4)
| X O O O O | | O O O | 0 points
| X O O O | | O O | On roll
| X | | |
| | | |
| | | |
| |BAR| |^ 5 point match
| | | |
| | | |
| X | | |
| O X X X X | X | |
| X O X X X X | X | O | 2 points
+24-23-22-21-20-19------18-17-16-15-14-13-+ X: ian
Win W(g) W(bg) L(g) L(bg) Equity (cubeful)
static: 0.158 0.057 0.002 0.494 0.053 (-0.647 (-0.579))
1 ply: 0.183 0.070 0.004 0.488 0.035 (-0.588 (-0.513))
2 ply: 0.151 0.054 0.003 0.509 0.047 (-0.662 (-0.596))
No redouble : -0.596
Redouble, pass : +1.000 (+1.596)
Redouble, take : -0.596 (+0.000)
Correct cube action: Optional redouble, take
0-ply evaluation gets it right and calls it a missed double.
Alert: missed double ( -0.022)!
Cube analysis
0-ply cubeless equity -0.647
0.158 0.057 0.002 - 0.842 0.494 0.053
1. Double, take -0.579
2. Double, pass +1.000 ( +1.579)
3. No double -0.601 ( -0.022)
Proper cube action: Redouble, take
Regards
Ian Shaw
- [Bug-gnubg] Optional redouble, or is it automatic,
Ian Shaw <=