Repertoire Debt: The Lines You Added and Never Learned

Owning is not knowing

You import a course. Four hundred positions arrive. The repertoire screen now says something impressive and you feel, briefly, prepared.

None of it is preparation yet. A position in a file is a position you own. A position you can produce from the board is a position you know. The distance between those two numbers is what this article is about, and for most imported repertoires it is enormous.

Why it happens

Adding is instant and learning is not.

Every other cost in chess study is paid as you go. Reading a book takes the time it takes. Watching a video takes an hour. But importing is a single tap that creates weeks of work, and nothing about the tap tells you that.

The result is a repertoire that grows in one direction only, with a review queue growing quietly behind it. You feel prepared and you are not, which is worse than feeling unprepared, because it stops you doing anything about it.

What it actually costs

A brand new position costs far more to maintain than a settled one, and the gap is larger than most people guess.

A position you have known for months comes back about once a month, so it costs you roughly twelve reviews a year. A new one comes back in four hours, then a day, then three days, then eight: five reviews in the first fortnight alone. Over the settling period a new position asks for something like ten to twenty times the attention of an old one. Multiply that by four hundred and the daily queue becomes something nobody can clear, which is the point at which people stop opening the app at all.

That is the real damage. Not the untrained positions themselves, but the fact that they crowd out the trained ones. Your good preparation decays while you are staring at a queue you cannot finish.

Clearing it

Three steps, in this order.

Stop adding. Nothing else works while the debt is still growing. No new courses, no new lines, until the queue is under control.

Cut before you learn. Most imported repertoires contain a lot you will never face. It is far cheaper to delete a position than to learn it, and the ones worth deleting are the improbable ones. The method is in when to prune a repertoire.

Learn the shallow ones first. Positions near the root come up in every game that opening occurs. Positions fifteen moves deep come up rarely. Working from the root outwards means every hour you spend starts paying immediately.

How to import without creating debt

Import the whole thing, then cut it down before you train any of it.

A downloaded repertoire is a draft. Treat it as somebody else’s first attempt: delete the lines you will never play, shorten the ones that go too deep, and rewrite the replies that do not suit you. What remains should be a size you can actually work through in a few weeks.

Twenty positions learned properly is worth more than four hundred owned. That sounds obvious written down, and almost nobody behaves as though it is true.

The test

Pick a random position from a line you imported. Set up the board. Play the move.

If you can, that position is preparation. If you cannot, it is a file. Do that five times and you will know your real repertoire size, which is usually a fraction of the number on the screen.

If you would rather see the number than estimate it, Chess Prep Pro tracks which positions you have trained and which are still waiting, so the gap is visible rather than assumed.