What to do in hyperbullet endgames.

In bullet ,time is very important:I lost and won a lot rating because of that,in very low time situations for the opponent,try giving checks,even if it is not a good move,because it is hard to premove out of a check.You might be wondering:what if I lose the queen,it may be a genius idea because it's check.Another hint is that when there is a rook on the 7 or 2 rank,try putting your rook there because they might have premoved to capture a pawn in a low time situation,here is an example:

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