This is using Jacobs MET for equal players so we can compare directly vs 100 ELO difference. Personally, I am shocked at the difference here with this much match left to play. What happens in many positions is that the weaker player makes more errors completing the game often giving up a couple percent chances. He can't give up much if you never enter here and just bangs away, but he can certainly give up lots if you survive. With that in mind I regard your decision to pass as borderline and find no fault in your decision to pass since it made you feel better.
Rollout started with 0 ply/cube for attacker and 2 ply for defender who is 100 ELO+ and using jacobs100 met
The score (after 0 games) is: gnubg 7, user 5 (match to 11 points)
Move number 3: user on roll, cube decision?
Pip counts: gnubg 159, user 145
Position ID: 4LvBQERm4+AEFA Match ID: cAlgAXAAKAAA
• user doubles
| Cube decision | |||
|---|---|---|---|
| 4-ply cubeless equity | +0.4013 | (Money: +0.3968) | |
| 0.6084 0.2781 0.0141 - 0.3916 0.1065 0.0056 | |||
| Cubeful equities: | |||
| 1. | Double, take | +0.7636 | |
| 2. | Double, pass | +1.0000 | +0.2364 |
| 3. | No double | +0.5883 | -0.1753 |
| Proper cube action: | Double, take | ||
The score (after 0 games) is: gnubg 7, user 5 (match to 11 points)
Move number 3: user on roll, cube decision?
Pip counts: gnubg 159, user 145
Position ID: 4LvBQERm4+AEFA Match ID: cAlgAXAAKAAA
• user doubles
| Cube decision | |||
|---|---|---|---|
| 4-ply cubeless equity | +0.4460 | (Money: +0.3995) | |
| 0.6083 0.2815 0.0143 - 0.3917 0.1072 0.0058 | |||
| Cubeful equities: | |||
| 1. | Double, pass | +1.0000 | |
| 2. | Double, take | +1.1151 | +0.1151 |
| 3. | No double | +0.7210 | -0.2790 |
| Proper cube action: | Double, pass | ||