Update README.md

README.md

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-license: cc-by-3.0
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+---
+license: cc-by-3.0
+---
+The Handwritten Chess Scoresheet Dataset contains a set of single and double paged chess scoresheet images with ground truth labels for training and testing.
+
+Images are named as follows:
+[Game #]_pg[page #].png
+
+Ground truth labels are formatted as follows:
+[Game #]_[page #]_[move #]_[black/white] [ground truth]
+
+Note: ground truth labels for testing - found in "testing_tags.txt" - do not include a page number as they are ground truths for the game represented by the corresponding two pages with the same game number. These labels are formatted as follows:
+[Game #]_[move #]_[black/white] [ground truth]