SantaDoku: Logic Puzzle

SantaDoku is a warm, unhurried logic puzzle for the holiday season.

Every board is a grid split into coloured regions. Place one Santa in each
region so that no row and no column holds two — and no two Santas ever touch,
not even at the corners. Work it out from the shapes of the regions. There is
always exactly one answer, and it can always be reasoned to. Nothing here
needs a guess.

Boards start at 5x5 and grow to a full 9x9 across 500 levels, so the rules
stay the same while the thinking gets deeper.

HOW TO PLAY

1. Tap once to mark a square you have ruled out.
2. Tap again to place a Santa there.
3. Press and sweep to mark a run of squares at once — handy on a 9x9.
4. Squares the rules have already settled are crossed off for you.
5. Solve the board and the level is yours.

Three hearts per level. A Santa in the wrong square costs one, and the game
tells you which rule it broke — a mistake that explains itself is worth more
than a mistake that just takes a life. A placed Santa stays put, so a stray
tap can never undo work you got right.

WHY YOU'LL LIKE IT

• One rule set, 500 hand-paced levels from 5x5 up to 9x9
• Every puzzle has exactly one solution, reachable by logic alone
• No timer and no move limit — think for as long as you like
• A Daily Challenge, a new board every day
• Three stars a level: keep your hearts and skip the hints to earn them
• Press and sweep to take notes quickly, and one undo takes back the lot
• Six night themes, or let them shuffle and get a new one each level
• Plays offline — no signal needed
• Your progress rides along with your Google account: change phone or
reinstall and your levels are still there. No sign-in, no account to make.
• Soft background music and a snowy Christmas board, both switchable
• No reading required — the rules are shown, not written

A GENTLE BRAIN WORKOUT

SantaDoku rewards patience. Find the region with only one square left, follow
what that rules out, and the board opens up a line at a time. It is a calm way
to keep your reasoning sharp — closer to a crossword on a winter afternoon
than to a race.

Happy holidays, and good luck with that 9x9.