Different openings for white and black

[CallOn84]

Hi developers.

I was wondering if it's possible to have different opening books for the white and black sides?

[MarkZH]

How would these books be different? Wouldn't any opening book have the best moves for both sides?

[CallOn84]

How would these books be different? Wouldn't any opening book have the best moves for both sides?

This is just my experience using the polyglot book feature. I don't want to set the move pick to be the best moves, as doing so would mean that there's not enough variety when the bot is playing. However, the weight_random and min_weight don't always work particularly well because the weights vary depending on the position hash. Furthermore, the best move in an opening doesn't necessarily mean the bot prefers it.

[AttackingOrDefending]

Would adding a normalization option to the opening books section help? For now, I'm thinking something like:

• No normalization (current)
• Make the sum of all weights equal to 100 (so new_weight = weight / sum(weights) * 100)
• Make the largest weight equal to 100 (so new_weight = weight / max(weights) * 100)

This should make using the min_weight option easier.

[CallOn84]

That might be good. I can test it with Elite Leela if you want to see how it performs

[MarkZH]

Let us know how the latest change works for you.