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'''Pigeon''',<br/>
an original, experimental 64-bit [[UCI]] compliant chess engine by [[Stuart Riffle]], written in [[Cpp|C++]].
Pigeon is [[:Category:Open Source|open source]], released under the [https://en.wikipedia.org/wiki/MIT_License [Massachusetts Institute of Technology#License|MIT license]].
To support [[SIMD and SWAR Techniques|SIMD]] by [[SSE2]] or [[AVX2]] instructions as well as [https://en.wikipedia.org/wiki/CUDA CUDA] for [[Nvidia]] [[GPU|GPUs]], much of the critical code is branch-free.
Pigeon generates [[Sliding Piece Attacks|sliding piece attacks]] by [[Kogge-Stone Algorithm|Kogge-Stone algorithm]] <ref>[https://github.com/StuartRiffle/pigeon/blob/master/src/bits.h pigeon/bits.h at master · StuartRiffle/pigeon · GitHub]</ref>.
