I set up the following position and wanted to roll it out CUBELESS.
Position ID vHsXAADCNhQCNw
Match ID MAEAAAAAAAAA
So I selected:
Settings---Options---uncheck "use doubling cube"
However I *forgot* to uncheck "use Jacoby rule"
If I'm doing a cubeless rollout, then I want G and B to count, so why do I still need to uncheck "use Jacoby rule" ?
Now for the strange part.
I did 32000 0-ply rollouts for this position. The reason is, I'm doing a study between GNU, SW3.2, SW4 and JF to see how they play this position
at 0, 1 and 2 ply.
Here's the results I got when I forgot to uncheck "use Jacoby rule"
(I adjusted the cubeless equity to score G and BG)
Compared to the other three Bots GNU didn't do so well at 0-ply.
It only managed 32.2 % wins versus SW3.2(40.4) JF(40.2) SW4(41.9)
The thing that did appear strange was the BG figure.
GNU(24.6) SW3.2(13.0) JF(13.6) SW4(12.8).
I ran the rollout again this time I unchecked "use Jacoby rule"
Here's the results:
These figures look more realistic and makes me suspicious of the first rollout with "cubeless AND use jacoby rule".
Am I missing something obvious here?
Is GNU acting as if the cube is in play and the Jacoby rule is in effect and estimating W/G/BG breakdowns when the game is cashed (due to too good to double) had the game gone to conclusion? Like a kind of pseudo-truncation?