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Model: FlameF0X/ChessSLM
Source: Original Platform

.gitattributes

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README.md

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+---
+license: apache-2.0
+datasets:
+- mlabonne/chessllm
+library_name: transformers
+tags:
+- chess
+pipeline_tag: text-generation
+---
+
+<div align="center">
+    <img src="https://cdn-uploads.huggingface.co/production/uploads/6615494716917dfdc645c44e/IEb4W62mlcCFKom7Fd4qi.jpeg" alt="NanoRS Banner" style="width: 100%; max-width: 100%; height: auto; display: inline-block; margin-bottom: 0.5em; margin-top: 0.5em; reading-order: 20px; border-radius: 20px;"/>
+</div>
+<br>
+
+# ChessSLM
+
+**ChessSLM** is a small language model designed to play chess using natural language move generation.  
+Despite having only **30M parameters**, it is capable of competing with and occasionally outperforming larger language models in chess-playing tasks.
+
+The model is based on the **GPT-2 architecture** and was pre-trained from scratch on **100,000 chess games** from the `mlabonne/chessllm` dataset using **SAN (Standard Algebraic Notation)**.
+
+Play against ChessSLM [here](https://flamef0x.github.io/other/chess).
+
+---
+
+## Overview
+
+- **Architecture:** GPT-2  
+- **Parameters:** ~30M  
+- **Training data:** 100k chess games  
+- **Notation:** SAN (Standard Algebraic Notation)  
+- **Task:** Autoregressive chess move generation
+
+ChessSLM demonstrates that **specialized small language models can perform competitively in narrow domains** such as chess.
+
+---
+
+## Capabilities
+
+ChessSLM can play chess by generating moves sequentially in SAN notation.  
+It has been evaluated in matches against several language models, including:
+
+- Claude [Won against it]
+- Gemini [Lost again it]
+- Qwen
+- GPT-2
+- GPT-Neo
+- Pythia
+- LLaMA
+- Mistral
+- other small chess-oriented models
+
+The model achieves an averaging rating of **around ~1054 Elo** against other language models despite its small size.
+
+---
+
+## Benchmark Results
+
+| Model                          | Elo Rating |
+| ------------------------------ | ---------- |
+| **FlameF0X/ChessSLM**          | 1154       |
+| DedeProGames/mini-chennus      | 1114       |
+| EleutherAI/pythia-70m-deduped  | 1099       |
+| nlpguy/smolchess-v2            | 1092       |
+| DedeProGames/dialochess        | 1078       |
+| nlpguy/amdchess-v9             | 1073       |
+| mlabonne/grandpythia-200k-70m  | 1065       |
+| **FlameF0X/ChessSLM-PM**       | 1055       |
+| DedeProGames/Chesser-248K-Mini | 1050       |
+| bharathrajcl/chess_llama_68m   | 1048       |
+| **FlameF0X/ChessSLM-RL**       | 1047       |
+| distilbert/distilgpt2          | 1047       |
+| Mattimax/EliaChess-70m         | 1047       |
+| HuggingFaceTB/SmolLM2-135M     | 1042       |
+| nlpguy/amdchess-v5             | 1041       |
+| facebook/opt-125m              | 1041       |
+| EleutherAI/pythia-14m          | 1037       |
+| DedeProGames/chennus           | 1034       |
+| Smilyai-labs/Smily-ultra-1     | 1034       |
+| huyvux3005/chessllm_FPT        | 1034       |
+
+---
+
+## Limitations
+
+Like many language-model-based chess systems, ChessSLM has several limitations:
+
+- **Illegal move hallucinations:** The model may occasionally generate moves that violate chess rules.
+- **No board-state verification:** Moves are generated purely from learned patterns rather than a validated game state.
+- **Limited strategic depth:** While competitive at lower Elo levels, it cannot match dedicated chess engines.
+
+These limitations are common for **pure language-model chess agents** that do not use external rule engines.
+
+---
+
+## Future Improvements
+
+Potential improvements include:
+
+- Adding **move legality filtering**
+- Integrating **board-state validation**
+- Training on **larger datasets**
+- Reinforcement learning through **self-play**
+
+---
+
+## Summary
+
+ChessSLM shows that **very small language models can achieve meaningful chess performance** when trained on domain-specific data.  
+It serves as a lightweight baseline for exploring **LLM-based chess agents** and **specialized small language models (SLMs)**.

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