Logic Puzzle Games: A Guide to the 12 in Go Brain 🧠

What makes a puzzle "logic"

Two things, really.

A unique solution. There is exactly one way the board can end up. That is what makes a deduction valid: if a cell can only be one value, it is that value, and you never have to hedge.

A guess-free path. A puzzle can have a unique solution and still be badly made — if the only way to progress is to try a value and see whether it explodes forty moves later. A well-made board always leaves at least one cell whose value follows from what you already know.

We generate every level in these twelve games with a solver in the loop, and we verify uniqueness before a level ships. Minesweeper is the clearest example of why that matters: the classic version can force you into a coin flip, so ours only generates boards that never do.

Number puzzles

Digits, sums and the constraint that a number can't appear twice where it shouldn't.

• Sudoku — the one everybody knows. 1–9 in every row, column and box. Four difficulties.
• Kakuro — a crossword made of sums. Each run of white cells adds to its clue with no digit repeated, so a clue of 3 across two cells can only be 1+2. Under-rated and genuinely deep.
• Cages — Killer Sudoku. Normal Sudoku rules plus dotted cages that must hit a sum. The cages give you a foothold before any digit is placed.
• Math Sprint — not deduction, but it belongs in the same drawer: arithmetic under a clock.

Placement & constraint puzzles

Nothing to add up. You are working out where things can and cannot go.

• Crowns — one crown per row, per column and per colour region, and no two crowns touching, even diagonally. The "no touching" rule is what turns it from easy to interesting.
• Tango — fill a 6×6 with suns and moons: three of each per line, never three in a row, plus equals and cross clues between cells.
• Mines — Minesweeper, with the coin flips engineered out. Every board is solvable by reasoning from the numbers.
• Zip — draw a single unbroken path that visits every cell and hits the numbered cells in order.

Drawing & tiling puzzles

The reward here is visual: a shape resolves out of the constraints.

• Nonogram — Picross. The numbers along each row and column describe runs of filled cells, and a picture emerges. The best entry point for anyone who finds number puzzles cold.
• Patch — Shikaku. Cut the grid into rectangles so each contains exactly one number, and that number is its area.
• Domino Fit — cover the entire board with dominoes. A parity argument kills most wrong starts instantly, once you learn to see it.
• Mend — restore a broken pattern by mirroring tiles back into symmetry. No timer, no failure state.
• Wend — half logic, half vocabulary: four words traced through a grid, every letter tile used once.

Where to start

If you have never done one of these seriously:

1. Nonogram, easy levels. The feedback is visual and the first ten levels teach the technique without telling you about it.
2. Crowns. One rule, immediately graspable, and the deduction chains get long fast.
3. Sudoku on Easy, then Cages when plain Sudoku stops resisting.
4. Kakuro when you want the deep end.

All twelve have undo and a hint button. Using a hint is not cheating — on a hard board it is the difference between learning a technique and closing the tab.

Questions people actually ask

Which logic puzzle is hardest?
Kakuro at the top of its ramp asks the most of you, because you are juggling sum combinations in two directions at once. Cages is a close second. Nonogram scales more gently than either.

Do these puzzles ever require guessing?
No. Every level is generated with a solver in the loop and verified to have exactly one solution, and Mines specifically only ships boards that can be cleared by reasoning alone.

Are logic puzzles good for your brain?
They are good practice at sustained attention and at holding several constraints in mind at once. We would not claim more than that — the research on puzzle games transferring to general intelligence is genuinely mixed.

Keep reading

• All 33 Games in Go Brain: The Complete List 🧠 — Thirty-three games, one hub. Sorted by what each one actually asks of your brain — so you can find the right one for the ten minutes you have.
• Brain Training Games: Focus, Memory and Reaction 🧠 — A Schulte table, a Stroop test, a memory sequence, a reaction timer and mental arithmetic — five games built around a number you can try to beat tomorrow.
• Word Games in Go Brain: Four Ways to Play With Letters 🧠 — A daily five-letter word, a grid of hidden word paths, four photos with one answer, and riddles designed to fool you. Four very different ways to play with language.