THULab/so101_chess_test5

SO101 Chess Test 5 (TsFile)

Converted from zacapa/SO101_chess_test5 at pinned revision 94cff45ac1ebc7ff9c3053430f2833d1fa7be887. Modalities: Time-series.

Dataset description

This LeRobot v2.1 SO-101 dataset records demonstrations of starting a chess game by moving the e-pawn.

The pinned task instruction is: “start chess game with move the E pawn to E4”.

• Source repository owner/publisher: zacapa
• License: apache-2.0 (declared by the source card).
• Paper/homepage/citation: no completed paper, homepage, or citation is documented in the pinned source card unless linked above.

Dataset Scale

Split	Episodes	Tasks	Source trajectory Parquets	TsFile rows	Sampling rate	TsFile files/shards
train	50	1	50	26,999	30 Hz	1

The staged Parquet has 26,999 rows and 17 columns including Time; TsFile chunk metadata independently reports the same 26,999 rows.

TsFile schema

Column	Role	TsFile type	Observed/source range
Time	TIME	INT64	0–17,967 ms; restarts per episode
episode_index	TAG	STRING	source integer 0–49
task_index	TAG	STRING	source integer 0–0
frame_index	FIELD	INT64	0–539 within an episode
sample_index	FIELD	INT64	0–26,998 globally

Exact remaining FIELD names/ranges and imported types:

• action_0–action_5 (FLOAT): shoulder pan/lift, elbow flex, wrist flex/roll, and gripper action
• observation_state_0–observation_state_5 (FLOAT): the corresponding SO-101 state

Conversion

• All source episodes in the train split are merged into data/so101_chess_test5_train.tsfile; episode_index and task_index are TAG dimensions.
• Time = round(timestamp * 1000) in milliseconds. The source timestamp column is omitted because it is redundant with Time / 1000 seconds.
• frame_index is retained. Source index is retained as sample_index.
• Every vector is fully flattened: the complete source name is kept, . becomes _, and element indices are appended. Float vectors are imported as single-precision FLOAT fields.
• Other scalar source columns shown above are retained; no trajectory rows are intentionally dropped.
• Source metadata is mirrored for publication, with copied meta/info.json rewritten to describe the converted data path and conversion semantics.

Video policy

The pinned metadata declares 50 source videos for observation.images.front. MP4 files were not downloaded or uploaded; they remain in the pinned source videos/ tree.

Minimal read example

from tsfile import TsFileReader

reader = TsFileReader("data/so101_chess_test5_train.tsfile")
print(reader.get_all_table_schemas().keys())
reader.close()

Source and provenance

• Source dataset: zacapa/SO101_chess_test5
• Pinned source revision: 94cff45ac1ebc7ff9c3053430f2833d1fa7be887
• Converted artifact: data/so101_chess_test5_train.tsfile