[Computer-go] Crazy Stone is back

valkyria at phmp.se valkyria at phmp.se
Mon Mar 5 06:31:33 PST 2018

My guess is that there is some kind of threshold depending on the 
relative strength of MC eval and the value function of the NN.

If the value function is stronger than MC eval I would guess MCEval 
turns into a bad noisy feature with little benefit.

Depending on how strong MC eval is this threshold is probably very 
different between engines. Also i can imagine that NN value function can 
have some gaping holes in its knowledge that even simple MC eval can 
patch up. Probably true for supervised learning where training data 
probably has a lot of holes since bad moves are not in the data.

The Zero approach is different because it should converge to perfection 
in the limit, thus overcome any weaknesses of the value function early 
on. At least in theory.

On 2018-03-05 14:04, Gian-Carlo Pascutto wrote:
> On 5/03/2018 12:28, valkyria at phmp.se wrote:
>> Remi twittered more details here (see the discussion with gghideki:
>> https://twitter.com/Remi_Coulom/status/969936332205318144
> Thank you. So Remi gave up on rollouts as well. Interesting "difference
> of opinion" there with Zen.
> Last time I tested this in regular Leela, playouts were beneficial, but
> this was before combined value+policy nets and much more training data
> was available. I do not know what the current status would be.

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