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Hello Dann, This is what I see when I run make: $ make g++ -Wall -std=c++17 -mpopcnt -pthread -static -msse -msse2 -msse3 -msse4.1 -mavx2 -O3 -march=native -flto -DEVALFILE=\"weights/ign-1-139b702b\" *.cpp nnue/*.cpp nnue/features/*.cpp fathom/tbprobe.c -DNDEBUG -DEVAL_NNUE=1 -D_BTYPE=0 -DSYZYGY_SU...

It does seem worrying that they MD5 hashes for the same file are different.
I suspect it is default sizes for structs, perhaps a different packing rule.
Modern compilers tend to pack on wider block sizes.
Are the files that you built larger?

For some reason, I cannot build your engine properly. I used cmake to create visual studio projects and it built something, but it did not find the nodes file and the uci form for arena is blank. It still plays chess, so I guess it is using the ordinary evaluation. I tried using mingw and it found t...

I do not see any reason not to use 7 man EGTB files. In fact, if 8 man files were available, I would prefer if they use those.
There is no reason to fumble in the dark, when you have a lantern, and so does everyone else.

I think we can measure several different things. We can measure engine strength . The most important thing here is symmetry. In other words, if Engine 1 plays opening X as white, then Engine 2 should also play opening X as white. If the engines exit the book in different openings or at different poi...

This contest is probably a much stronger measure of book performance, because the programs are all the same, to the only variable that changes is the opening book:
https://sites.google.com/site/computers ... book-cs-52

The new opening books were revolutionized starting with the Cerebellum book.
From that point forward, opening books became enormously strong, giving about 50 Elo to the top engines.

Here is Sedat's current contest:
https://sites.google.com/site/computers ... book-cs-53

Haha, everytime AMD doubles their core count I hear the champagne corks popping here. ;) -- Srdja I crack my knuckles and jump for joy when a new AMD super server comes out. My 3970x saves me a boatload of money when I am analyzing, I almost never run my old server room servers around the clock lik...

I will see if I can find it. If you want the best books, technology has come a very long way and the books from Sedat's contests are pretty well guaranteed to be stronger. Any top ten book from one of Sedat's book contests will beat a book written twenty years ago that was derived from super GM and ...

I also think you should be able to use the experience file I created. You should give it a try.