Blunder!

BLACK has just played 14...Qb6-c5 in Spanton (168) - Jonathan Underwood (188), Dorset open round five.

The position is roughly equal after 15.Bxf6 Nxf6 16.Ne3

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15.Ne3?? Qxg5 0-1
My final score of +2=1-2 was an ECF grading performance of 189.2 (assuming my round-three opponent, Declan Lovelock, really does come on to the grading list at about 220, giving me a performance against him of 158).