mephisto-emu's Introduction

Mephisto-emu

An experimental emulator for the Mephisto MM2 chess computer, providing a UCI compatible interface. Maybe other boards in the Mephisto Modular series will be added later.

Quickstart

git clone https://github.com/BierLiebHaber/mephisto-emu

cd mephisto-emu

Get the MM2 rom file (I used version 400, tho others should also work) from somewhere and rename it to MM2.rom. Get the hg240.rom rom file from somewhere. Put both into the mephisto-emu folder.

cargo build -r

./start.sh

Known Bugs/Limitations

using the engine with a fixed movetime needs quite a big margin (> 1sec) since we need to extract the info for the best current move
all other go modifiers except movetime are unsupported
while we do return a ponder move there is no way to actually use this information in the engine
the first move in a new game (or movestack) can not be canceled by movetime or the stop command

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mephisto-emu's Issues

Crash... last move should be d7f5 instead of d7f6 I think.

movestack f7e7                                                                                                                                                                                                                                                                                [0/1880]
movestack a7b7                                                           
movestack g4d7                                                           
movestack h4g6                                                           
movestack e7f6                                                           
movestack b7d7                                                           
movestack f6g6                                                           
Round:  3                                                                
  -----------------                                                      
8 |.|.|.|.|.|♗|.|.|                                                      
  -----------------                                                      
7 |.|.|.|♛|.|.|♙|.|                                                      
  -----------------                                                      
6 |♙|.|.|♙|.|.|♔|♙|                                                      
  -----------------                                                      
5 |.|.|.|.|.|.|.|.|                                                      
  -----------------                                                      
4 |.|.|.|.|♟|.|.|.|                                                      
  -----------------                                                      
3 |.|.|.|.|.|.|.|.|                                                      
  -----------------                                                      
2 |♟|♟|♟|♟|.|♟|♟|♟|                                                      
  -----------------                                                      
1 |♜|.|♝|.|♚|.|.|♜|                                                      
  -----------------                                                      
   a b c d e f g h                                                       
Traceback (most recent call last):                                       
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1965, in _parse_uci_bestmove
    move = board.push_uci(tokens[0].lower())                                                                                                       
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                       
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/__init__.py", line 3164, in push_uci
    move = self.parse_uci(uci)                                           
           ^^^^^^^^^^^^^^^^^^^                                           
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/__init__.py", line 3147, in parse_uci
    raise IllegalMoveError(f"illegal uci: {uci!r} in {self.fen()}")                                                                                
chess.IllegalMoveError: illegal uci: 'd7f6' in 5b2/3Q2p1/p2p2kp/8/4P3/8/PPPP1PPP/R1B1K2R w KQ - 0 22

During handling of the above exception, another exception occurred:                                                                                

Traceback (most recent call last):                                       
  File "/home/chess/engine_vs_engine/main.py", line 115, in <module>                                                                               
    main(mep_emu, texel)                                                 
  File "/home/chess/engine_vs_engine/main.py", line 103, in main                                                                                   
    asyncio.run(                                                         
  File "/usr/lib/python3.11/asyncio/runners.py", line 190, in run                                                                                  
    return runner.run(main)                                              
           ^^^^^^^^^^^^^^^^                                              
  File "/usr/lib/python3.11/asyncio/runners.py", line 118, in run                                                                                  
    return self._loop.run_until_complete(task)                                                                                                     
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                     
  File "/usr/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete
    return future.result()                                               
           ^^^^^^^^^^^^^^^                                               
  File "/home/chess/engine_vs_engine/main.py", line 62, in run_game                                                                                
    result1 = await engine1.play(board, limit1)                                                                                                    
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                    
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1789, in play
    return await self.communicate(UciPlayCommand)                                                                                                  
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                  
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1133, in communicate
    return await command.result                                          
           ^^^^^^^^^^^^^^^^^^^^                                          
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1386, in _line_received
    self.line_received(engine, line)                                     
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1726, in line_received
    self._bestmove(engine, line.split(" ", 1)[1])                                                                                                  
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1745, in _bestmove
    best = _parse_uci_bestmove(engine.board, arg)                                                                                                  
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                  
  File "/home/chess/engine_vs_engine/.venv/lib/python3.11/site-packages/chess/engine.py", line 1967, in _parse_uci_bestmove
    raise EngineError(err)                                               
chess.engine.EngineError: illegal uci: 'd7f6' in 5b2/3Q2p1/p2p2kp/8/4P3/8/PPPP1PPP/R1B1K2R w KQ - 0 22

Movestack:

e4 e5 2. Nf3 Nc6 3. Bc4 Nge7 4. Nc3 a6 5. Ng5 Nd5 6. Nxd5 h6 7. Nxf7 Qh4 8. Nxc7+ Ke7 9. Bd5 Nb4 10. Nxh8 Nxd5 11. Ng6+ Kf7 12. Nxh4 Nxc7 13. Qh5+ Kg8 14. Qxe5 d6 15. Qa5 Bg4 16. Qxc7 Ra7 17. Qb8 Kf7 18. Qxa7 Ke7 19. Qxb7+ Bd7 20. Ng6+ Kf6 21. Qxd7 Kxg6

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