It sounds to me like your 3x3 patterns are an orthogonal set relative to everything else. Because of that, you must pin on 3x3 gamma. You may need to pin a few more... Note that any set of features where you don't pick one for every legal move doesn't require pinning because you implicitly have an "anything else" that is pinned to a value of 1.

I hope that helps!

Thanks a lot Jason, I understand clearly now! It's exactly the way you described. I hope I'll get my bot to run until the next tournament. ;)

-ibd
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