Add chess position batches

train/lichess_db_standard_rated_2022-06/batch_0001.meta.json

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+{"schema_version": 4, "source": {"provider": "lichess", "archive_id": "lichess_db_standard_rated_2022-06", "url": "https://database.lichess.org/standard/lichess_db_standard_rated_2022-06.pgn.zst"}, "batch": {"split": "train", "batch_number": 1, "chunk_index": 746, "seq": 0, "file_name": "batch_0001.parquet"}, "stats": {"num_games": 100000, "num_positions": 7637039, "duplicates_dropped": 0, "file_sha256": "4748b09d65f5a605b2eed6f5ed1aa7baf41769c18ab618573ffeb399c159f952", "unigram_counts": [0, 0, 0, 0, 317325980, 43974934, 8130064, 8821613, 11822032, 5261839, 7637039, 44101397, 8080477, 8926113, 11801547, 5250422, 7637039, 3792689, 3844350, 5242759, 41577, 17587, 289566, 65922, 4566, 668, 14888, 24003, 715, 2588, 6977, 424478, 16960, 6558, 1477227, 7627124, 177, 490, 545, 358, 135, 861, 397, 103, 132, 654, 800, 1247, 941, 2580, 322, 173]}, "range": {"date_min": "2022-06-04", "date_max": "2022-06-08"}, "config": {"batch_size": 100000, "train_ratio": 0.95, "subsampling": {"tiers": [{"min_elo": 2200, "rate": 1.0}, {"min_elo": 1900, "rate": 0.1}, {"min_elo": 0, "rate": 0.001}]}, "time_control_filter": {"min_seconds": 300}}, "provenance": {"config_fingerprint": "fa4b4bc94e351664c1a3b253664023daaaef8d5c", "pipeline_version": "3", "created_at": "2026-10-27T06:01:03.074988+00:00"}}

train/lichess_db_standard_rated_2022-06/batch_0001.parquet

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+oid sha256:4748b09d65f5a605b2eed6f5ed1aa7baf41769c18ab618573ffeb399c159f952
+size 124167963

train/lichess_db_standard_rated_2022-06/batch_0002.meta.json

@@ -0,0 +1 @@
+{"schema_version": 4, "source": {"provider": "lichess", "archive_id": "lichess_db_standard_rated_2022-06", "url": "https://database.lichess.org/standard/lichess_db_standard_rated_2022-06.pgn.zst"}, "batch": {"split": "train", "batch_number": 2, "chunk_index": 1102, "seq": 0, "file_name": "batch_0002.parquet"}, "stats": {"num_games": 100000, "num_positions": 7695032, "duplicates_dropped": 0, "file_sha256": "05ea010d005fc639be5389ffd66733d20ecdcaa4d8716c0f960e5b2241615d3a", "unigram_counts": [0, 0, 0, 0, 320323581, 44121058, 8183908, 8852001, 11861097, 5288346, 7695032, 44234344, 8116983, 8989390, 11852577, 5268699, 7695032, 3821629, 3873403, 5307893, 39377, 18929, 287671, 67320, 4522, 640, 15183, 24169, 607, 2506, 6405, 425316, 16787, 6970, 1470737, 7684725, 189, 506, 578, 368, 146, 898, 390, 93, 102, 641, 915, 1359, 948, 2682, 333, 159]}, "range": {"date_min": "2022-06-04", "date_max": "2022-06-12"}, "config": {"batch_size": 100000, "train_ratio": 0.95, "subsampling": {"tiers": [{"min_elo": 2200, "rate": 1.0}, {"min_elo": 1900, "rate": 0.1}, {"min_elo": 0, "rate": 0.001}]}, "time_control_filter": {"min_seconds": 300}}, "provenance": {"config_fingerprint": "fa4b4bc94e351664c1a3b253664023daaaef8d5c", "pipeline_version": "3", "created_at": "2026-10-27T06:14:59.161633+00:00"}}

train/lichess_db_standard_rated_2022-06/batch_0002.parquet

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+size 125112851