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Samuel Trenholme wrote on Wed, Jun 29, 2022 09:45 PM UTC:

To play games the way one plays correspondence games on lichess or chess.com, one simply has grace time without reserve time.

E.g.

If we have no (0) reserve time (Edit: In other words, no “spare time”, no “min time”, no “extra time”, and no “bonus time”), and we have a grace time of 24 hours, this means, as soon as one moves, the opponent has 24 hours to reply to your move. If they fail to reply within 24 hours, they lose the game.

Lichess makes things simple by having no reserve time whatsoever, and having only the following settings for grace time (which is simply the time needed to make a move before losing the game on Lichess) in correspondence games:

  • 1 day
  • 2 days
  • 3 days
  • 5 days
  • 7 days
  • 10 days
  • 14 days
  • Untimed

So, for dealing with “this guy never moves once they are losing”, having a grace time of 14 days ensures that both people have plenty of time to make moves (especially in today’s world with smart phones everywhere), but that forgotten games are won by the last person to make a move before forgetting the game exists.

Ignoring “Min Time”, “Bonus Time”, and “Bonus Period”, “Spare Time” is, using a Fischer (increment) chess clock the amount of time given for the game, “grace time” would be 0 (since a simple Fischer clock doesn’t have this), and “extra time” would be the increment (the amount of time given for each move).

Let me explain this with an example. We have a game with 5 days (120 hours) of spare time, a grace time of 24 hours (1 day), and an extra time of 1 hour.

The clock starts, and Alice (white) is playing Bob (black).

  • Alice makes her first move as soon as the game starts. She now has 121 hours spare time: 120 hours at game start, then 1 hour added after making her first move.

  • Bob replies 23 hours later. Since he replied within 24 hours, he loses no spare time, but gets one hour of extra time. So now Alice and Bob have 121 hours of spare time. Grace time is always the same for each move.

  • Alice is busy the next day and needs 26 hours to reply to Bob’s move. The first 24 hours were against her grace time, so only the final two hours of her delay moving went against her spare time. She lost two hours of spare time (119 hours now), but gained one hour after making her move (so she now has 120 hours of spare time again; with grace time, if she doesn’t move within 144 hours, she loses).

  • Alice created a lot of tactical complications for Bob, so Bob needs 72 hours to reply to Alice’s move. 24 hours is grace time, so we only look at the remaining 48 hours when calculating spare time lost. Bob lost 48 hours spare time taking so long to make his move, but gains one hour after making his move. 121 hours - 48 hours (delay moving after grace time) + 1 hour (extra time) = 74 hours left (with the 24 hour grace time, Bob needs to make his next move within 98 hours or lose the game)

  • And so on.

(The time control that works best for me is 2 days: 48 hours to make a move or I lose. The problem with one day time controls without reserve time is that every day I have to make my move earlier in the day, but, with two days, if I make a move every day, it doesn’t matter what time of day I make the move. There are ways to have one-move-a-day without the issue of having to make my moves earlier and earlier each day, but our time controls are probably already too complicated).


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