Update README.md

README.md

@@ -41,7 +41,10 @@ tags:
 
 <!-- Provide a quick summary of the dataset. -->
 
-4,062,423 chess puzzles, rated and tagged. See them in action on [Lichess](https://lichess.org/training/themes).
+4,062,423 chess puzzles, rated and tagged. See them in action on [Lichess](https://lichess.org/training/themes). 
+
+Generating these chess puzzles took more than **50 years of CPU time**. We went through **300,000,000 analyzed games** from the Lichess database, and re-analyzed interesting positions with Stockfish 12/13/14/15 NNUE at 40 meganodes. The resulting puzzles were then [automatically tagged](https://github.com/ornicar/lichess-puzzler/tree/master/tagger). To determine the rating, each attempt to solve is considered as a Glicko2 rated game between the player and the puzzle. Finally, player votes refine the tags and define popularity.
+
 
 ## Dataset Usage
 
@@ -54,6 +57,8 @@ dset = load_dataset("Lichess/puzzles", split="train")
 
 ## Dataset Details
 
+### Dataset Sample
+
 One row of the dataset looks like this:
 
 ```python
@@ -68,13 +73,17 @@ One row of the dataset looks like this:
  'GameUrl': 'https://lichess.org/4MWQCxQ6/black#31',
  'OpeningTags': 'Kings_Pawn_Game Kings_Pawn_Game_Leonardis_Variation'}
 ```
+### Dataset Fields
 
-### Dataset Creation
-
-Generating these chess puzzles took more than 50 years of CPU time. We went through 300,000,000 analyzed games from the Lichess database, and re-analyzed interesting positions with Stockfish 12/13/14/15 NNUE at 40 meganodes. The resulting puzzles were then [automatically tagged](https://github.com/ornicar/lichess-puzzler/tree/master/tagger). To determine the rating, each attempt to solve is considered as a Glicko2 rated game between the player and the puzzle. Finally, player votes refine the tags and define popularity.
-
-## Dataset Structure
-
-<!-- This section provides a description of the dataset fields, and additional information about the dataset structure such as criteria used to create the splits, relationships between data points, etc. -->
+Every row of the dataset contains the following fields:
 
-### Dataset
+- `PuzzleId`:
+- `FEN`:
+- `Moves`:
+- `Rating`:
+- `RatingDeviation`:
+- `Popularity`:
+- `NbPlays`:
+- `Themes`:
+- `GameUrl`:
+- `OpeningTags`: