Hi, I found currently open_spiel cannot be compiled under Windows when following the installing instruction. There are some small necessary fixes to let it work under Windows ( Windows 11 / Visual Studio 2022 Community).

• (STRUCT){a,b,c} => STRUCT{a,b,c} : the original struct initialization method with extra () does not work in MSVC.
• realpath / PATH_MAX : there are Linux-only file IO functions/constants and an alternative method on Windows must be provided to let it work.
• std::max: Windows SDK has a macro "max" which conflicts with std::max, so one need the Windows-only switch #define NOMINMAX to turn off it.
• Other compilation options: to use the correct C++ standard, deal with chess characters, deal with large object files in pyspiel, one need options "/std:c++17 /utf-8 /bigobj in MSVC.

Nice! Thank you!