Sortl now has four ways to play

Sortl started with one rule: pour the top layer onto a matching colour or into an empty tube, and get every tube down to a single colour. That's still the daily puzzle, and it's still the cleanest version of the idea.

Levels mode has grown past that, though. What started as a flat pool of puzzles is now 240 levels across four genuinely different mechanics — 60 each.

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Classic (levels 1–60)

The daily format, un-timed and at your own pace. Sixty tubes-and-layers puzzles, sorted from simple four-tube warm-ups to tight seven-tube tangles. If you're new to Sortl, this is where to build the instincts everything else builds on.

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Split (levels 61–120)

Some layers aren't a single colour — they're split ◧ between two. A split layer only settles into a tube once both halves have found a matching home, which means you're often solving two colour puzzles at once inside one tube.

A handful of tubes start locked. They open the moment you pour in the colour they're waiting for — so part of the puzzle is figuring out which locked tube unlocks which move.

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Overflow (levels 121–180)

Tubes stop being a fixed size. Some hold four layers, some hold three, some hold only two — and a layer that fits comfortably in a full-size tube might not fit in a small one at all.

That turns capacity into a planning problem, not just colour matching. Early levels lean on big tubes to ease you into the idea. By the back half, small tubes dominate, and every pour has to account for what will actually fit before it accounts for what colour it is.

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Blind Stack (levels 181–240)

This is the one that changes what "reading the board" even means.

You only see the top layer of every tube. Everything underneath is hidden — not for a few seconds, not behind a timer, just hidden until you actually pour from that tube and expose what's next. Once revealed, it stays revealed for the rest of the attempt.

That makes the early moves in a Blind Stack level fundamentally different from every other mode: you're not solving the puzzle in front of you, you're partly solving the puzzle of finding out what the puzzle is. A pour that looks safe can uncover a colour you didn't plan for. The depth tooltip still works here, but it only shows you what you've already uncovered — no peeking ahead.

Scoring bands are a little wider in this mode. Hitting par without full information is a different, harder task than hitting par with the whole board visible, and the scoring reflects that.

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Play

Sortl is free, no account needed: sortl.stoop.games

The daily puzzle is Classic sorting, same as always. Split, Overflow, and Blind Stack are all in Levels mode, whenever you want them.