0.1s move

I'm curious  about something I observe in games on chess.com.

When playing one sometimes sees an opponent make a series, often 5 to 10 long, of, normally endgame, of moves.

I wonder how this is possible, it's generally acknowledged that reaction time is about 0.2s.

What enables them to respond to moves at such a sustained high rate, even if we assume that they don't spend anytime analysing the opponent's move?

They use premove to play fast. It is quite useful in bullet games. When a normal move takes atleast 1s, premove needs only about 0.2s.

Enable premove. It is very useful in bullet games. Say I have two rooks against a lone king. I can finish the mate in less than a second with premoves

FYI, premoves are 0.1s not 0.2s

Sometimes it takes about 0.2s for me

If you have good high-speed connection, .1s should be how long a premove takes. I think its still .1s for you, but the lag in your connection is slowing it down

My premoves generally take 2+ days . . .

Yeah premoves

premoves take 0.1 seconds but sometimes take longer if you have slow internet.

Actually, I think the premoves don't waste any time on your clock. If you have infinitely fast connection, I don't think it wastes any time. It might be that the communication with the satellite is taking long. If we can premove on an in-person game (on a device), then it wouldn't lag. Since that is not possible, the fastest it can go is .1s

premoves are capped at 0.1 seconds. 

you will lose at least 0.1 sec on your clock no matter how fast you move.

oh

Thank you all for explaining that!

That's not necessarily true. While premoves automatically take 0.1 seconds, if you have exceptionally low latency and fast reflexes, you could manually make a move faster that doesn't take that long. In practice it is unlikely, but there are some topics out there where people have had moves like that.

I wish premoves didnt take any time off of ur clock

Yea, but unless you have internet this fast, you'll always use some time on the clock

Premove is cheating. Any computer aids are cheating. If you use it, you are cheating.

Premoves are specifically allowed when enabled and by definition are not cheating.