Sniffdoku: Dog Sudoku Puzzles

Sniffdoku is dog sudoku with no numbers: a calm, clever logic puzzle starring a Dalmatian with a very good nose.

Place one dog in every row, every column and every color region. There's just one more rule: dogs never touch, not even at the corners. Every puzzle has exactly one answer, and you can always find it by logic alone.

Like sudoku, star battle or logic grid puzzles? These dog puzzles train your brain one clear step at a time, at your own pace.

HOW TO PLAY
• One dog per row and per column
• One dog per color region
• Dogs never touch, not even diagonally
• Tap a cell to mark it with an X, double-tap to place a dog, swipe to cross out many cells at once

WHAT'S INSIDE
• Over 10,000 levels, from quick 4x4 warm-ups to big 10x10 brain teasers, then endless puzzles
• Every board is checked: one solution, no guessing needed
• Sniff a hint: your Dalmatian sniffs out the next logical step and shows why it works
• Mistakes explained: a wrong dog shows which rule it breaks before a heart goes
• Undo any move; X marks never cost a heart; 3 hearts per level
• Earn more hints as you clear levels
• Replay any level you have unlocked
• Color-blind help (a letter and pattern for each region) and a reduced-motion setting
• Soft sounds and a calm music loop, each with its own switch
• Plays offline on phones and tablets

A bold, bright logic game for dog lovers and puzzle fans. Sniff it out!

Recent changes:
A new, simpler tutorial: learn the rules in about 25 seconds.