Visibility: ON
Draw on Edges: OFF Panel: OFF

Normal Sudoku Rules apply.

All other clues increase as follows:

Thermometers increase from the bulb end.

The four cells around a white dot will increase in a clockwise direction, but the starting cell is unknown.

Arrows indicate that the adjacent cell is the start of an invisible thermometer that increases in that direction for as long (and only as long as) the value of the cell with the arrow.

Numbers outside the grid indicate the presence of a thermometer somewhere in that row or column that rises only for that number of cells. The number is only present in rows or columns where there is no tie for the longest invisible thermometer.

Everything Increases Big Tiger

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Mode: Surface

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:
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:
Sudoku Z/Y & XCV Keys:
Saving/Storage
Saved Settings:
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)
F2: Problem mode
F3: Solution mode
F4: Hide/Show Timer
Tab or Enter: Cycle Input Tools
?: Show keyboard shortcuts

Z: Normal Submode*
X: Corner Submode*
C: Centre Submode*
V: Shading (Surface Mode)*
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)

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

Shading - DG (Dark Grey), GR, LG, BL (Black):
Number - Normal, L, M, S - Green, Blue, Red Sudoku - Normal, Centre - Green, Blue, Red:
Line - Green, Double:
Line - Ignore Given Line Segments:
Line - Green, Double:
Edge - Green, Double:
Edge - Ignore Edges on Grid Border / Givens:
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:

White space:

*Update display* button only affects the following properties:

Display size:

Gridlines:

Gridpoints:

Outside frame:

Resize

Add/Remove Rows/Columns:

Save screenshot

White border:

Image quality:

File Type:

Title & Author:

Rules:

Rotate / Move / Add / Remove

Rotate:

Flip:

Move:

Add/Remove Rows/Columns:

Share Puzzle

Puzzle Information

Generate URL

Add/Remove Genre Tags

Extended Output

Solution will check for the following:

Custom Message

Header

Share Replay

Input/Output Sudoku String

Load URL

General Settings

Keyboard Shortcuts

In Sudoku Mode

In Surface Mode

Welcome to Penpa+

Usage

Development

Sudoku/Puzzle Rulesets

Update display button only affects the following properties: