Time Clock
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tmartincentrisinfocom
Feb 10, 2023
0
#1
I just finished a game ending in a draw. My opponent’s clock kept adding time. In the last few moves, he went from 3 seconds to 2.7, 2.4, 2.1, 2.4, 2.6, 2.7. He made 8 moves in less than 3 seconds. A 10 minute game should be a 10 minute game. How and why?
f
Feb 11, 2023
0
#3
tmartincentrisinfocom wrote:
I just finished a game ending in a draw. My opponent’s clock kept adding time. In the last few moves, he went from 3 seconds to 2.7, 2.4, 2.1, 2.4, 2.6, 2.7. He made 8 moves in less than 3 seconds. A 10 minute game should be a 10 minute game. How and why?
Lag compensation.
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken
Feb 11, 2023
0
#4
That is such a BS answer. If the clock is lagging, why isn’t the move lagging?
Feb 11, 2023
0
#5
tmartincentrisinfocom wrote:
That is such a BS answer. If the clock is lagging, why isn’t the move lagging?
It has to do with move lag As soon as you make your move, your opponent's clock starts on your client, well before they ever receive it and at the same time your clock is still moving on your opponent's client.
The server receives the move and subtracts the allowed lag compensation from the transit times, updates the clock values and sends those to your opponent. When the opponent receives the move, their clocks are updated to the correct times.
The situation works the same the other direction. Basically, neither player is docked for basic transit times and some additional lag is forgiven. That requires clocks to be updated and will always add some amount of time.