Daily Arrow Sudoku
The extra rule
Digits along an arrow add up to the digit in its circle.
The circle holds the total. The cells along the arrow shaft add up to it.
Short arrows give the most away. A two cell shaft summing to a single digit means the circle is at least 3, and a three cell shaft needs a circle of at least 6, which already rules out most of the grid.
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.