Thinking is not free.

In chess, every extra minute spent on a move has a price. The calculation may earn that minute back by finding a tactic, rejecting a bad idea, or separating two plausible candidates. But sometimes the position has already given us everything we are going to get. We keep thinking anyway, hoping that more time must produce a more certain answer.

Then we make one of the moves we were already considering.

A lesson carried over from Magic

I came to this through Nicolai Bolas’s discussion of PV’s Rule, based on Paulo Vitor Damo da Rosa’s article about choices in Magic: The Gathering.

PV’s original rule is about denying useful choices to a strong opponent. If you can force an outcome, allowing the opponent to choose among several outcomes—including the one you could have forced—usually helps them. They know their hand. They know their plan. If they choose something else, they probably have a reason.

That is not exactly the situation in chess. The opponent will always choose a reply after we move. But the discussion points toward a useful practical fact: the right to make the next decision has value, and the clock decides who is paying for it.

Once I move, my clock stops. The position becomes my opponent’s problem.

When two moves are close enough

Suppose I have found two candidate moves. Both pass a basic blunder check. Neither allows an obvious forcing tactic. I calculate each one, but the lines remain roughly equal and the position stays playable.

I can spend another three minutes demanding that the board confess which move is perfect. Sometimes it will. Often it will not.

Those three minutes still leave the clock, even if they add nothing to the decision.

The practical rule is:

If I do not have a better move, I should move.

“Roughly equal” does not mean Stockfish would assign both moves the same number. It means that, within the limits of my calculation, neither move has a concrete advantage large enough to justify more time. I have not found a tactical refutation, a major positional concession, or a clear reason that one plan is easier to execute.

At that point, choosing is part of playing well.

Put the clock on them

Moving does two things at once. It preserves my remaining time, and it asks my opponent a new question.

Perhaps both of my candidate moves are objectively fine, but one creates several reasonable replies. Perhaps one keeps more tension in the position. Perhaps one follows a plan I understand while making the opponent define theirs. These are legitimate practical advantages when the chess reasons do not otherwise separate the moves.

This is not an argument for playing quickly because speed feels confident. It is an argument for noticing when thought has stopped producing information.

There is a difference between calculation and circling. Calculation discovers something:

  • a forcing reply;
  • a tactical resource;
  • a favorable exchange;
  • a dangerous change in the pawn structure;
  • or a reason to reject a candidate.

Circling repeats the same concerns without changing the choice. The clock charges the same rate for both.

What the extra minute must earn

Before spending more time, I can ask one question:

What fact am I still trying to discover?

If I can answer that clearly—whether a sacrifice works, whether a pawn ending wins, whether a king can survive an open file—then calculation has a job. Keep calculating.

If I cannot answer it, I may be waiting for certainty that chess does not offer. Choose the move that is safe, understandable, and easiest to continue playing. Then put the clock on the other side.

The important exceptions are the irreversible moments. A pawn move cannot be withdrawn. A favorable exchange may only be available once. Checks, captures, and direct threats can turn a quiet position into a forced sequence. These moments deserve time because one concrete detail can separate the candidates completely.

But not every move is that move.

A small over-the-board routine

When I feel myself stuck between reasonable options, I want to use this sequence:

  1. Check the opponent’s checks, captures, and threats.
  2. Confirm that each candidate survives the reply I fear most.
  3. Ask what concrete fact would make one candidate better.
  4. If further calculation is not finding that fact, choose the move with the clearer follow-up.
  5. Move.

This may sound opposed to the usual advice to use the clock. It is not. I have played games where I moved too quickly and ignored obvious danger. I have also spent nearly five minutes on a knight move without making it good. Time is a resource, but using a resource means receiving something in return.

The goal is not to think less. It is to stop paying for the same thought twice.

Find a move worth playing. Check it. If the next minute cannot find a reason to reject it, play it—and let the other clock start answering questions.