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AAAI 2022 Paper: Bet even Beth Harmon couldn't learn chess like that :)

Python 23.61% Jupyter Notebook 76.39%

learning-chess-blindfolded's Introduction

Learning Chess Blindfolded: Evaluating Language Models on World State Tracking

Chess as a testbed for evaluating language models on world state tracking.

Pretrained model released via Huggingface model hub. Colab notebook to interact with the pretrained model.

Setup

Step 1

git clone https://github.com/shtoshni92/learning-chess-blindfolded.git
cd learning-chess-blindfolded/

Step 2: Install packages. The following are the core pacakage which can be separately installed.

chess==1.3.0
pytorch-lightning==0.9.0
torch==1.7.1
transformers==4.2.2
prettytable==0.7.2

Or just do:

pip install -r requirements.txt

Finally

cd src/
export PYTHONPATH=${PWD}:${PYTHONPATH}

Data Preparation

The processed data is available here. UCI-based language models can be trained using just this data. To train models which require piece type/board state, extract this additional information via steps described below.

Next we described the steps used processing the data.

  • Data can be downloaded from rebel.

  • Parse PGN to get data in UCI annotation (max_games to extract can be specified)

python data_processing/parse_pgn.py --source_file PGN_FILE --output_dir OUTPUT_DIR --max_games 1e7
  • Filter data to remove duplicate games, games with skewed lengths (too short or too long), and games missing move annotations (rare case). If output_file is not specified, a suffix of "-uniq" is added to source file name.
 python data_processing/filter_data.py --source_file INPUT_FILE --output_file OUTPUT_FILE
  • Next we create partitions of the processed data
src_file=OUTPUT_FILE

cd ../data
output_dir="lm_chess/uci"
mkdir -p ${output_dir}

head -n 500000 ${src_file} > ${output_dir}/train.txt

tail -n 30000 ${src_file} | head -n 15000 > ${output_dir}/dev.txt
tail -n 15000 ${src_file} > ${output_dir}/test.txt
# Cloze task data
tail -n 130000 ${src_file} | head -n 50000 > ${output_dir}/other_eval.txt

cd ../src
DATA_DIR="../data/lm_chess"

Train-S, Train-M, and Train-L correspond to the first 15K, 50K, and 200K games respectively of the 500K training set.

  • Create vocabulary
python data_processing/create_vocab_models.py --vocab_dir $DATA_DIR/vocab --source_file $DATA_DIR/uci/train.txt
  • Querying data stats (average length of games etc.):
python data_processing/data_stats.py --data_dir $DATA_DIR --vocab_dir $DATA_DIR/vocab/
  • Create Cloze tasks (Ending Square and Starting Square)
python data_processing/generate_cloze_eval_tasks.py --data_dir $DATA_DIR

Additional Board State

Tne next two steps create additional information regarding the world state.

  • This step extracts piecetype information as a numpy file for all the language modeling data splits.
python data_processing/get_piece_type_rap.py --data_dir $DATA_DIR
  • This step extracts the board state from the FEN notation and stores it as a numpy file for different splits. This can be used to train multiview models (not supported in commits since Feb 2021).
python data_processing/get_fen_repr.py --data_dir $DATA_DIR
python data_processing/get_fen_other_eval.py --data_dir $DATA_DIR

Training

Default settings:

  • Train-L i.e. 200K games for training
  • GPT2-small configurations i.e. n_layer=12, n_head=12, n_embd=768
  • Notation UCI

Here are the commands to train the various models.

Baseline UCI model

python main.py --data_dir $DATA_DIR

UCI + RAP

python main.py --rap_prob 0.15 --data_dir $DATA_DIR

UCI + AP

python main.py --oracle --data_dir $DATA_DIR

Custom training size, number of layers, context size, and other model configurations can be specified as follows:

python main.py --train_size 15_000 --n_layer 16 --window_size 50 --data_dir $DATA_DIR

RNN models can be trained via:

python main.py --model_type rnn --n_layer 3 --rnn_dropout 0.2 --data_dir $DATA_DIR

Reformer models can be trained via:

python main.py --model_type reformer --n_head 12  --n_layer 12  --train_size 200_000

Peformer models have the following options:

python main.py --model_type performer --local_attn_heads 0  --generalized_attention  --feature_redraw 100 --n_head 12 --n_layer 12  --train_size 50_000 --precision 32 --data_dir $DATA_DIR

Analysis

Random Legal Move Baseline: Baseline where a random legal move is chosen as the predicted move. Performance of this baseline gives a sense of complexity of the task even if the exact board state is available.

python analysis/random_legalmove_baseline.py --data_dir $DATA_DIR

Error Analysis for Ending Squares: Classifies the error made by the model among four categories, namely unreachable, syntactic, pseudo legal, and path obstruction.

python analysis/error_analysis_end.py --model_dir $MODEL_DIR

Citation

@article{toshniwal2021chess,
    title = {{Learning Chess Blindfolded: Evaluating Language Models on State Tracking}},
    author = "Shubham Toshniwal and Sam Wiseman and Karen Livescu and Kevin Gimpel",
    year={2021},
    eprint={2102.13249},
    archivePrefix={arXiv},
}

learning-chess-blindfolded's People

Contributors

shtoshni avatar

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