Crystallite is a simple modification of an old Crystal 3.1 by Joseph Ellis. Crystallite is made especially for fortress positions. It recognizes most fortress positions really well, better than Crystal 3.1 and Crystal 3.2.
x64 AVX2, BMI2, modern, base and sources in one file:
https://www.mediafire.com/file/erl8l7s5 ... 1.zip/file
