timospal / nnue-bitboard-chess-engine Goto Github PK

Recently i discovered your NNUE engine, and i like it !
I managed to compile its source (on Linux) and downloaded the concerning NNUE file.
The engine runs fine in CuteChess (GUI), i did several test games and now i have some remarks and questions.

The engine often makes a move within one second !?
And calculation is always done upto depth 8, never deeper ..
I propose better time management, and thus (?) a stronger engine - i guess the current rating (using nn-62ef826d1a6d.nnue) is about 2500.
eg. when i let engines play a 15 minute game, your engine still moves within 1 second and ends up with more time on the clock !

It often makes a draw by 3-fold repetition !?
I attach many (35) bullet games (1m+2s bullet) against several engines : some-bullet.zip : see those repetitions.
You really should solve this issue, it's a pitty losing winning positions this way ..

Can the NNUE file be changed ? which model type is used, and can you point to (some of those) alternatives ? i guess these are the 20 Mb ones, but i have no clue ..
btw. i could change the name of the NNUE file in the code and then compile again, but having an UCI option would be preferred ..

The output (in CuteChess GUI) is minimal : we only see the eval cp value of bestmove, no best moves at each depth, no PV line, no display of the thinking time ..

The cmake & make procedure differs slightly from "Build info" in README .. here's what i did :

cmake .
make

At first i had one compile error, but i solved it by adding the line #include <string> on top of /src/miscellaneous/Timer.h .. then compiling went well, although some warnings are still shown .. i managed to solve these also (just to learn), i mainly changed [=] to [=,this] in /src/representation/Board.cpp ..

Finally, i wonder about MCTS : i see a few source files concerning this, but your README doesn't mention anything about it .. does the engine really use MCTS ? Maybe create an UCI option to en/disable ..

[ i'm on Xubuntu 22.04 ]