System spontaneously retracts played move from one square to another square

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TomKalisch

Swiss private club rapid tournament had player complete a move with bishop to a3 and then 3 seconds later without any prompting from this player the system retracted move to c5 with a red line showing between a3 and c5(where it was captured for free on c5).How does this happen??

Martin_Stahl
TomKalisch wrote:

Swiss private club rapid tournament had player complete a move with bishop to a3 and then 3 seconds later without any prompting from this player the system retracted move to c5 with a red line showing between a3 and c5(where it was captured for free on c5).How does this happen??

 

Probably premoves were on and it was an accidental premove.

TomKalisch

What is a premove?