CogniBump Sudoku
Train your brain in a few minutes
TagTeam Ready
Time 00:00
Mistakes 0 / 3
Tip: Tap a cell, then tap a number or toggle Notes to pencil possibilities. Solo or TagTeam remote play
Number Pad
Tap a number to place it in the selected cell. In Notes mode, numbers toggle as pencil marks.
Moves & Notes
Pencil in possibilities instead of final answers.
Clear a number or notes from the selected cell.
Fill in one correct number on the board.
TagTeam (remote play)
Each player gets 3 moves, then sends a link to their friend. Play the same board back and forth by text.
Mode: Solo play. Add both names and tap “Start / Update TagTeam” to begin.
After your 3 moves, tap “Share Turn Link”, copy the URL, and text it to your friend.
How to play
  • Fill every row, column, and 3×3 box with digits 1–9.
  • Each digit can only appear once per row, column, or box.
  • Givens (bold numbers) can’t be changed.
  • You lose at 3 mistakes — take your time!