From XG help
5. Decisions A decision is a checker move or a cube double that is considered non-obvious by the computer. Considered obvious are the following:
A forced moved
A move for which the best choice and the worst choice have an equity difference of less than 0.001.
A double action where the equity before doubling and after doubling is the same (optional double)
A double action where the equity before doubling is 0.200 larger than the equity after the double (obvious non double)
A double action where the equity before doubling is 0.200 larger than the equity after a drop (obvious too good to double)
A double action where the equity before and after a double is very negative (less than -0.900). This corresponds to a loss of position when trailing in the match by a lot
Are never consider as a obvious:
A double decision resulting in a double
A take decision
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For example. The following position is not nonobvious and does not count as a decision unless you choose to double.
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| XGID=------D--------------a-a--:2:1:1:00:0:12:0:17:10 | |||||
| Blue on roll, cube action? | |||||
| Analyzed in Rollout | No redouble | Redouble/Take |
| Player Winning Chances: | 4.17% (G:0.00% B:0.00%) | 4.17% (G:0.00% B:0.00%) |
| Opponent Winning Chances: | 95.83% (G:0.00% B:0.00%) | 95.83% (G:0.00% B:0.00%) |
| Cubeless Equities | -0.917 | -0.937 |
| Cubeful Equities | ||
| No redouble: | -0.910 | ±0.000 (-0.910..-0.910) |
| Redouble/Take: | -0.937 (-0.027) | ±0.000 (-0.937..-0.937) |
| Redouble/Pass: | +1.000 (+1.910) | |
| Best Cube action: No redouble / Take | ||
| Percentage of wrong pass needed to make the double decision right: 1.4% | ||
| Rollout details | ||
| 1296 Games rolled with Variance Reduction. Moves: 3-ply, cube decisions: XG Roller | ||
| Double Decision confidence: | 100.0% | |
| Take Decision confidence: | 100.0% | |
| Duration: 0.2 second | ||
eXtreme Gammon Version: 2.10, MET: Kazaross XG2