Clash of the eager hands

Whose hands are these?

The moving fingers play
and having played, move on ...
(apologies to Omar Khayyam)

Obviously, not mine. I just happened to be standing around and aiming my camera on the chess board when suddenly, there was this flurry of motion. Both hands met in the centre of the board to exchange and remove pieces.

And this was the position in the aftermath of the clash of hands.