Flounder

An attempt at a Chess Engine in F#. This was initially just a conversion from the excellent StockNemo.

The code was then been significantly re-factored to be more in line with standard F# coding.

The code has now been completely revisited with removal of such features as Classes and Inheritance. Instead extensive use is made of F# Record Types and Modules.

Furthermore, the NNUE has been replaced with that from the brilliant Berserk Engine.

The result seems a pretty strong engine.

Features

Included

The engine includes:

• Null Move Pruning
• Late Move Pruning
• Reverse Futility Pruning
• Three-fold Repetition Pruning
• Mate Distance Pruning
• Material Draw Pruning
• Check Extension
• Quiescence Search with SEE Pruning
• History Table
• Killer Move Table
• Search Effort Table
• Move Search Stack
• Reduced Time Move
• MVV-LVA Table

Not Included

The following features were not included as they were tested and seemed to give no benefit:

• Futility Pruning
• Late Move Reduction