Killer Sudoku 6x6

No ads, no tracking, no subscription — just puzzles. Killer Sudoku on a compact 6×6 grid, sized for quick sessions you can actually finish. 5 difficulties.

Killer Sudoku 6×6 — Big Brain, Small Grid

Love Killer Sudoku but don't always have time to spare? Meet the 6×6 grid — all the addictive cage-sum puzzling of traditional Killer Sudoku, sized perfectly for the moments you actually have. A full puzzle fits between meetings, errands, appointments, or stops on your commute. Start, solve, feel the satisfying click of completion — all in one sitting.

WHAT IS KILLER SUDOKU? Fill the 6×6 grid so every row, column, and 2×3 box contains the numbers 1–6. But there's a twist — cells are grouped into cages with a target sum. The numbers in each cage must add up to the target, with no repeated digits. It's Sudoku meets math, and it's wonderfully addictive.

NEW TO KILLER SUDOKU? No problem. A built-in beginner guide walks you through the rules step by step — from basic Sudoku logic to cage strategies. Start with Beginner difficulty and you'll be solving puzzles in minutes.

QUICK TO START. SATISFYING TO FINISH. With fewer digits and a smaller grid, each move feels consequential and the path to victory stays visible. Beginners grasp the rules in minutes. Experts chase personal best times. Everyone walks away with that little hit of "I solved it."

5 DIFFICULTY LEVELS + RANDOM • Beginner — Perfect for learning the ropes • Easy — A gentle challenge • Medium — Where the fun really starts • Hard — For experienced puzzle solvers • Expert — Only for the brave • Random — Feeling lucky? Let the app choose

POWERFUL TOOLS • Pen & Pencil modes with circled candidate marks • Smart pencil marks — auto-fill candidates or let the app remove impossible ones as you solve • Built-in calculator with cage-tap integration and running totals • Cage combinations reference for 2, 3, 4, and 5-cell cages • Save up to 50 puzzles and resume where you left off • Full undo & redo history • Check for mistakes, Reveal when stuck • Hardware keyboard support on iPad with full shortcut overlay

MAKE IT YOURS • 6 color themes — Gray, Teal, Blue, Brown, Green, Purple • Dark mode — follows your system setting or choose manually • Haptic feedback for a satisfying tactile experience • Optional timer with best time tracking per difficulty • Completion stats and personal records

PLAY OFFLINE Everything runs on your device. No internet required, no ads, no data collection. Your progress saves automatically.

Try 3 free puzzles at each difficulty. Love it? Unlock unlimited play with a single one-time purchase — no subscriptions, ever.