# Time control notation explained?

Can someone explain this time control notation to me?

6SS, 40/120 sd30 d5

• I would like to know if the delay applies to the first time control too, as written 40/2,SD/30,d10...so whenever the delay is mentioned it applies to each time control period?
– user8740
Commented Nov 14, 2015 at 14:50
• @jeff, Yes, if there is just one delay listed at the end, it applies to all of the time controls. If the delays are different, then they will be listed explicitly for each time control.
– Andrew
Commented Nov 17, 2015 at 5:38
• Does that mean if there is no delay in the first period then a "d0" should be added? Commented May 25, 2016 at 19:47

That indicates slightly more than just the time control:

1. 6SS indicates a 6-round Swiss system tournament.
2. 40/120 indicates that each side will have 120 minutes to make the first 40 moves of the game.
3. sd30 indicates that after the first 40-move time control is met, each side will have an additional 30 minutes for the remainder of the game ("sd" = sudden death).
4. d5 indicates that there will be a 5-second delay on each move, during which one's clock will not yet have started to tick.
• Thanks for the answer! For clarification: so let's say at the end of the 40th move I have 20 minutes left from the 120 minutes. Do I now set the clock to 30 or to 50 (20 + 30)? Commented Jan 4, 2015 at 23:19
• @DerekChiang, the 30 minutes is added to whatever time you didn't use from the first time control (so in your example, you'd have 50 minutes for the remainder of the game).
– ETD
Commented Jan 4, 2015 at 23:22
• Can you explain what Sudden Death means? I know but that would help your answer! :P (i mean just put it in the answer b/c not many ppl read the comments :P Commented Jan 5, 2015 at 18:29
• How would you notate 90 minutes for the entire game with 30 seconds increment? `sd90 inc30`? Commented Aug 7, 2023 at 18:39