How to play
- Goal
- Fill each row, column and bold box with 1–6 once each, and make every arrow’s digits add up to its circled digit.
- How it ends
- The chart finishes when all Sudoku and arrow rules hold; entries can be erased or undone.
- Record
- Your first unassisted finish keeps its time for this chart; later plays are practice.
- Fill each row, column and bold two-row × three-column box with 1–6 exactly once. Given digits remain fixed.
- Add the digits along an arrow’s path to obtain the digit in its circle. Exclude the circle itself from that sum.
- A digit may repeat along an arrow when its cells do not share a Sudoku house. There is no increasing-order or diagonal rule.
- Select a cell first, then enter a digit. N toggles manual notes; entering a digit clears that cell’s notes. Notes do not reveal candidates.
- Inspect arrow highlights the shape at the focused cell; it explains the visible rule without calculating an answer.
- Undo restores entries and notes. Restart keeps the original first clock. Reload retains marks, notes and Undo; replay is fresh practice.
Controls
| Mouse / touch | Select a cell, then press a digit or Erase; drag to move focus |
|---|---|
| Arrow keys | Move the focused cell |
| 1–6 / 0 / Delete | Enter a digit / erase the focused editable cell |
| N | Toggle manual notes |
| Enter / Space | Apply the selected digit or note |
| Z / Y | Undo / Redo |
| R / Restart | Confirm clearing entries while keeping the first clock |
| Escape | Cancel a gesture, close a dialog or return to the atlas |
| Controller | D-pad moves; A enters; X cycles digit; Y erases; shoulders Undo/Redo; B back; Start settings; Back rules |
Tips for Arrow Sudoku
- Start with missing house digits Compare the unused digits in a row, column and box.
- Exclude the circle Only the path digits contribute to the arrow sum.
- Keep notes manual Record your own possibilities and use Undo to recover a correction.
Questions about this game
Does the circle count in its own sum?
No. Add only the path digits.
May an arrow repeat a digit?
Yes, when ordinary rows, columns and boxes permit it.
Which boxes apply?
The bold boxes are two rows by three columns.
Can I change a given?
No. Given digits remain fixed.
Do notes provide hints?
No. Notes record only the digits you enter.
Can replay improve my first time?
No. Replay is practice and preserves your first saved finish.
All charts are open. Reload retains an unfinished first attempt, Undo and its original clock; resumed finishes stay local. Practice reopens fresh and preserves your first time.
Watch how to play
About Arrow Sudoku
Solve circle sums among the brass instruments of an arcane observatory. Ordinary Sudoku houses and arrow equations work together.
All 160 original charts are open in four shelves of forty. Every chart has one independently proved answer and a complete bounded deduction.
An uninterrupted verified first solve can claim the named fastest time. Reload retains your attempt and its clock; resumed finishes stay local.
