Question: meaning of column in ray-stat

[pnprog]

Hi!

When I enter the ray-stat command, I will get a result similar to this one:

|Move|Count|Simulation|Policy    |Value     |Win       |Best Sequence
| C16|   98|   59.1837|   20.1409|   64.1175|   63.1308|w Q4
| D16|   84|   47.6190|    8.1501|   68.1366|   64.0331|w D4
|  Q3|   45|   53.3333|   26.9417|   67.6667|   64.8000|w C16
| D17|   35|   51.4286|   10.9871|   71.1593|   67.2131|w D15
|  Q4|   32|   43.7500|    8.1715|   67.0206|   62.3664|w D16
|  D4|   29|   37.9310|    0.9061|   69.0554|   62.8305|w D16

I would like to confirm the meaning of the different columns. In my understanding:

• Move: The move considered by Ray (they are sorted from best move to worse move)
• Count: Is this the number of MC simulation performed to evaluate that move?
• Simulations: Is this the wining rate (%) of the MC simulation?
• Policy: Is this a policy network value? indicating the probability of that move to be played by human, as given by a neural network?
• Value: Is this a value network win rate (%)? indicating a probability to win from that position, as given by a neural network?
• Win: Is this the win rate (%) ? calculated as a weighted average of Simulation and Value ? Then I am not sure why the value are not decreasing. In the example above, what is the best move? D17 or C16?
• Best Sequence: the best sequence for both player starting from that move

Thanks a lot!

[zakki]

You are right.
Win: Ray plays the biggest Count move. For example, by only 1 search, Win 100% or 0%. Playing that 100% winning move doesn't make sense.
At first ray tends to select bigger policy moves. After thinking more and more, ray selects bigger Win moves.

[pnprog]

Thanks for your prompt reply.

Sometime, I get not data for Win:

|Move|Count|Simulation|Policy    |Value     |Win       |Best Sequence
| F17|  409|   50.3667|   69.7768|||w C10
| P17|  157|   52.8662|   25.1722|||w C6
|  C6|  104|   51.9231|    0.2533|   55.9466|   55.1419|w F4
| O17|   11|   36.3636|    2.5871|||
|  F3|    9|   22.2222|    0.2220|   53.7620|   47.4540|
| P16|    6|   50.0000|    1.0271|||
| C14|    4|   75.0000|    0.2098|||

Is that an indication that my computer is not fast enought? That I should give more thinking time to Ray?

[zakki]

Do you use ray without GPU and with multi thread e.g. --thread 4?
Current Rn's network is too heavy for CPU, so NN evaluation didn't complete in time.

[pnprog]

My computer is old and slow (no GPU) that's why.
But for my application, it is not a problem. The important thing is that when I got missing values for Win I can issue a warning to the user to tell him to increase the thinking time.

Thanks!

[zakki]

@pnprog Perhaps --reuse-subtree is useful for goreviewpartner.