Update README.md

README.md

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----
-license: cc0-1.0
-dataset_info:
-  features:
-  - name: image
-    dtype: image
-  - name: board_state
-    dtype: string
-  - name: active_color
-    dtype: string
-  - name: castling_rights
-    dtype: string
-  - name: en_passant_target_square
-    dtype: string
-  - name: best_continuation
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 26061473408.474
-    num_examples: 999999
-  - name: validation
-    num_bytes: 3293166231.0
-    num_examples: 125000
-  - name: test
-    num_bytes: 3242260311.0
-    num_examples: 125000
-  download_size: 31940403915
-  dataset_size: 32596899950.474
-configs:
-- config_name: default
-  data_files:
-  - split: train
-    path: data/train-*
-  - split: validation
-    path: data/validation-*
-  - split: test
-    path: data/test-*
----
+---
+license: cc0-1.0
+dataset_info:
+  features:
+  - name: image
+    dtype: image
+  - name: board_state
+    dtype: string
+  - name: active_color
+    dtype: string
+  - name: castling_rights
+    dtype: string
+  - name: en_passant_target_square
+    dtype: string
+  - name: best_continuation
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 26061473408.474
+    num_examples: 999999
+  - name: validation
+    num_bytes: 3293166231
+    num_examples: 125000
+  - name: test
+    num_bytes: 3242260311
+    num_examples: 125000
+  download_size: 31940403915
+  dataset_size: 32596899950.474
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+  - split: validation
+    path: data/validation-*
+  - split: test
+    path: data/test-*
+language:
+- en
+tags:
+- chess
+- chess puzzles
+- lichess
+- chess positions
+- chess board
+---
+# Dataset Card for Chess Puzzles Images (mini)
+This dataset contains 1,249,999 chess board positions in JPG format, derived from [Lichess](https://lichess.org/training/themes) puzzles. Each image is accompanied by a shortened FEN string, indication for the color to play as, castling and en passant availability, and best moves in standard algebraic notation. 
+The fields are as follows: 
+
+- **`image`**: `image`, A visual representation of the chess board showing the current piece arrangement.
+- **`board_state`**: `string`, A shortened FEN (Forsyth–Edwards Notation) string representing the piece placement on the board after the opponent's move. This state indicates the position from which the player must find the correct continuation.
+- **`active_color`**: `string`, Indicates which player's turn it is to move. "w" for White to move and "b" for Black to move.
+- **`castling_rights`**: `string`, Indicates the remaining castling options for both players. If neither side has the ability to castle, this field uses the character "-". Otherwise, **this field contains one or more letters**: "K" if White can castle kingside, "Q" if White can castle queenside, "k" if Black can castle kingside, and "q" if Black can castle queenside.
+- **`en_passant_target_square`**: `string`, Specifies the square in algebraic notation where an en passant capture is possible. If no en passant capture is available, this field contains "-".
+- **`best_continuation`**: `string`, The solution to the puzzle, consisting of "only moves" - moves that are significantly better than any alternatives. For mate-in-one puzzles, multiple solutions may exist if they all result in checkmate.