Timeseal is a program that has been developed to improve chess on internet. Netlag often causes players to lose valuable seconds or even minutes on their chess clocks.
Transmission time is counted against you, unless the chess server can tell exactly when information is transmitted.
What timeseal does is record your thinking time, so that transmission time is not counted against you.
Timeseal will not prevent netlag but it makes the games fairer when lag occurs.
