add 'wall or move' rule (for Atlantis)

[RainRat]

No description provided.

[ianfab]

Let me know if there is anything I can help with regarding this PR. I have no problem with keeping this open if you plan to return to it at a later point, just want to briefly clarify what is the status.

[RainRat]

In case you haven't seen the new commit, I believe I have fixed the problem.

[ianfab]

Sorry for the long delay. When I run a search on the starting position for atlantis with debug=yes then it raises a failed assertion at depth 1:

stockfish: position.cpp:1032: bool Stockfish::Position::legal(Stockfish::Move) const: Assertion `is_ok(m)' failed.

Could you please have a look?

[RainRat]

I wasn't able to reproduce this error.

• I merged the latest changes in an odd way, but it should still be understandable.

[ianfab]

Here are the exact commands I used to reproduce the error:

make clean
make -j2 ARCH=x86-64-bmi2 build debug=yes
./stockfish load variants.ini
setoption name UCI_Variant value atlantis
position startpos
go

[RainRat]

ok, i think this might be the fix.

[ianfab]

Thanks