Daily Non Consecutive Sudoku
The extra rule
Cells that touch edge to edge never hold consecutive digits.
If a cell holds 5, none of the cells directly above, below, left or right may hold 4 or 6. Diagonals are free.
Nothing is drawn on the grid for this, which is what makes it feel different. The rule applies everywhere at once, so every digit you place quietly rules out two digits in four directions.
Controls
Click a cell and type a digit, or use the pad. Space toggles pencil marks. Arrow keys move. Progress saves in this browser as you go, so you can come back to the same puzzle later today.
Solvable Without Guessing
Every puzzle here was generated and then handed to a solver that is only allowed techniques a person can use. If it could not finish the grid without a guess, the puzzle was thrown away rather than published. That also makes the answer unique, because every digit it placed was forced.
More to Play
There is also a kropki sudoku, a xv sudoku, a greater than sudoku, a nonogram with hand drawn pictures, and 2048. All of them are on the games page, and the solvers for real objects are on the puzzle tools page.