IKADOKU
One squid per color, row and column. A puzzle solved by sharp thinking.
Play now
Free · No sign-up · Play in your browser
IKADOKU is a logic puzzle where you place squids on a board split into colored areas. There are just three rules: one squid per color, one per row and column, and no two squids may touch — not even diagonally. There is no luck involved, so every puzzle can be cracked by reasoning, and that "aha!" moment feels great every time.
Clear all 1,000 Hard stages and you've reached IQ 300 level!
How to play
- The board is divided into several colored areas. Place exactly one squid in each color area.
- Every row and every column also holds exactly one squid, and squids can never sit next to each other — diagonals count too.
- Tap a cell to mark it with an ×, or drag across cells to mark many at once. Double-tap a cell to place a squid there.
- You can make up to 3 mistakes, and the first mistake on each stage doesn't count. When your hearts run out, the stage restarts.
- New to the game? Open "How to play" to see the rules, then warm up with a small practice puzzle.
Features
- Three modes — Easy, Normal and Hard — with 1,000 stages each. Clear 100 stages of one mode to unlock the next.
- A new daily puzzle every day. Clear it to earn pearls and keep your streak going!
- Stuck? Use hints, the Ink Boost that blacks out cells where no squid can go, or the Helper Meteor that drops a correct squid onto the board.
- Hard mode brings big boards and tough puzzles — no meteors, no Ink Boost, just your own brain.
- Spend pearls on new characters and outfits for your squids. Illustrated technique pages teach you how to solve smarter.
Tips
- Start by looking for a color with only one cell. The squid has to go there — then mark × on its row, column and neighbors.
- If a color sits entirely inside one row (or column), every other color's cells in that row can be marked ×.
- If two colors fit only inside the same two rows, all other colors in those rows are ×. The same works for three colors in three rows.
- When you're truly stuck, ask "what if I put a squid here?" If that would leave some color with nowhere to go, that cell is an ×.
Who it’s for
Perfect for anyone who loves number-free logic puzzles and the thrill of finally cracking a tough one. It also works great as a one-puzzle-a-day habit.
More games
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
NEW
Train racingIKA TRAIN WORLD TOUR
From Kamakura to Paris and Sydney: race to 1st on the world's railways!
-
NEW
-
NEW
-
-
-
-
