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Classic 9×9 logic. New puzzle every day, no fluff.

6×6 Sudoku. Same rules, quicker solve — great warm-up.

Place queens across colored regions. Quick rounds, deep logic.

Trace a path through every cell, in order. No crossings.

Fill the grid with O and X — balanced lines, never three in a row.

Shade the duplicates — no repeats, no touching, all connected.

Place bulbs to light every cell — and no bulb lights another.

Cross-sums — fill each run with distinct digits that hit its clue.

Fill cells from the number clues to reveal a hidden picture.

Fill the grid with rectangles — size clues constrain each piece.

Find the hidden calculation that hits the target.

Delete numbers until every row and column hits its target sum.

Fill 1–N with no repeats — cages must hit their arithmetic targets.

Guess the 5-digit number in six tries — green, yellow, gray.

Place dominoes so every region's constraint is met.

Split the row into segments that hit the target sums.

Guess the 5-letter word in six tries — green, yellow, gray.

Find the hidden words — every direction, no doubles.

Rapid mental-math duel — solve more than your opponent in 60 seconds.

Fill the grid so every row and column is a valid equation.

Numbers flash and vanish — sum them from memory.

Pick the path through arithmetic gates to hit the target.

Hand-picked one-offs. Each puzzle is its own world.

An interactive solving aid for Jane Street's official monthly puzzle.