Visibility: ON
Draw on Edges: ON Panel: OFF

Normal sudoku rules apply.

Normal Killer rules apply: Digits within a cage cannot repeat, and must sum up to the clue given in the top left corner (if given).

Special Red Light, Green Light rules apply:
(Feel free to skip to the tl;dr version below!)

The solver has to find and run along an orthogonally connected path, that starts and ends in the green cells. While on a green light, the solver must run as fast as they can, and while on a red light, they must try not to move! Don’t worry — the speed is represented by the value of the digits, so you won’t need your training gear in order to solve this sudoku! :-)

Actual rules — pay attention:
The solver has got a green light as long as the path goes on cells that aren’t part of a killer cage. On these green cells, the solver must keep up the speed, thus these cells must all contain high digits (>5). If the path crosses a killer cage, the solver has got a red light. Here the solver must try and stand as still as he can, in order not to be killed, thus the red cells must all contain low digits (<5). The path does not touch itself orthogonally or diagonally.

tl;dr version:
Find an orthogonally connected path that starts and ends in the green cells. Digits on the path that are inside killer cages must be low (<5), and cells on the path that are outside of killer cages must be high (>5). The path does not touch itself orthogonally or diagonally.

Good luck surviving!

Red Light, Green Light Piatato

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Mode: Surface

Image URL:

X position:
Y position:
Width:
Height:
Opacity:
Draw in foreground:
Mask out white from image:
White mask threshold:

Ignore Pencil Marks (L, M, S values)

Ignore Whitespace for Import

Skip Import Non-Square Check

Error: it contains non-alpha-numeric characters

App Display
Display Theme:
Display Layout:

Timer:
Puzzle Display
Sudoku Pencil Marks:
Sudoku Normal:
Outline on Text:
Star Battle Dots:
Surface Second Color:
Tools
Custom Colors:
Floating Panel:
Quick Panel Button:
Export
Auto-Shorten Links:
Input Options
Mouse Middle Button:
Reload Protection:
Conflict Detection:
Check pencil marks:

Any color can match green line/edge in solution:
Sudoku Z/Y & XCV Keys:
Saving/Storage
Saved Settings:
Auto-save puzzle in browser history:
Local Storage:	Your browser has disabled or doesn't support local storage.

Ctrl + z: Undo
Ctrl + y: Redo
Ctrl + d: Clone
Ctrl + i: To copy the previous number/alphabet/symbol from Number mode with PANEL: ON
Ctrl + Space: Delete numbers and symbols at the same time
Shift + Space: Enter a space (Works in "Number" Mode => "L", "M", "S" and Long" SubMode options only)
Ctrl + a: Select all cells
Alt + drag: For rectangular selection
F2: Problem mode
F3: Solution mode
F4: Hide/Show Timer
Tab or Enter: Cycle Input Tools
ESC: To clear selection or exit open dialogues
?: Show keyboard shortcuts

Use number keys 0 - 9 to fill colors in the selected cells. switch between styles. For styles 11 and 12, press ALT+1 or ALT+2 respectively.

z: Normal Submode*
x: Corner Submode*
c: Centre Submode*
v: Shading*
Shift: For Temporary Corner Submode
Shift + Delete: Deletes only corner pencil marks from the selected cells
Ctrl - For Temporary Centre Submode / Selecting Multiple Cells/ Deselecting selected cells
Ctrl + Delete: Deletes only centre pencil marks from the selected cells
Delete: To delete all the contents of the cell
Space: To delete only the selected submode contents. (E.g. If the cell contains both centre and corner pencil marks, and if the current submode selection is "Corner submode", the pressing Spacebar would delete only the corner pencil marks)
Double click: Double clicking the number in a cell will select all instances of that number. (applies to number mode as well)

Use number keys 0 - 9 to quickly switch between styles. For styles 11 and 12, press 1 and the second digit in quick succession.

It's a web application and universal pencil puzzle editor capable of drawing many different kinds of pencil puzzles. You can download your puzzles as images and save puzzle links in the form of URLs to share with others.

Shortcuts Tool Instructions Youtube Tutorials List of Youtube Tutorials Steps to Create a Sudoku/Puzzle Frequently Asked Questions Discord Channel Bookmarklet to Open Puzz.Link / PZV / pzprxs / OtherPenpaFork Puzzles in Penpa+

Provide Feedback Contribute to Project Ongoing TO-DO list Changelogs Credits License

Note: This is by no means an exhaustive list. Penpa+ is not affiliated with these sources. Please contact respective owners for any further information.

Eric Fox - Dictionary of Rulesets Ryotaro Chiba - WPC Puzzles LMI - WSC IB (Sudoku Variants) Puzzle Duel Club Ropeko - Logic Puzzles List

Surface - Match exact colors:
Shading - DG (Dark Grey), GR, LG, BL (Black):
Number - Normal, L, M, S - Green, Blue, Red Sudoku - Normal, Centre - Green, Blue, Red:
Line - Match exact styles:
Line - Green, Double only:
Line - Ignore Given Line Segments:
Line - Match exact styles:
Line - Green, Double:
Edge - Match exact styles:
Edge - Green, Double:
Edge - Ignore Edges on Grid Border / Givens:
Edge - Match exact styles:
Edge - Green, Double:
Wall - Green:
Shape - Shape - Square - Option 2:
Shape - Shape - Circle - M size - Options 1 & 2:
Shape - Shape - Corner triangle - Options 1 to 4:
Shape - Arrow - Small - Options 1 to 8:
Shape - Number - Math - Black, Green - Options 2 & 3:
Shape - Special 1 - Battleship - Black - Options 1 to 6 and Curvy Black - Options 1 to 4:
Shape - Special 1 - Tent - Option 2:
Shape - Special 1 - Star - Options 1 to 3:
Shape - Special 2 - Lightbulb - Option 3:
Shape - Special 2 - Minesweeper - Option 4:

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Mode: Surface

New Grid

Board type:

Size:

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*Update display* button only affects the following properties:

Display size:

Gridlines:

Gridpoints:

Outside frame:

Resize

Add/Remove Rows/Columns:

Set Background Image

Save screenshot

White border:

Image quality:

File Type:

Title & Author:

Rules:

Rotate / Move / Add / Remove

Rotate:

Flip:

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Add/Remove Rows/Columns:

Share Puzzle

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Solution will check for the following:

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Welcome to Penpa+

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Sudoku/Puzzle Rulesets

Update display button only affects the following properties: