What do numbers next to round score mean

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Monie49
W20B means that greggpeyton beat #20 with the Black pieces.
Chensquare

You can interperte the code in the following mode. WIn/Lose number black/white. eg. No 7 Plaer ClXX had lost to No.10 TheXXX in Black. While No. 10 Player had won No.7 player in white. Or say vise versa.