YORIMICHI PLAYLIST
HOW TO PLAY
Controls and goals
- How to operate
- Compatible with mouse, keyboard, touch, D-pad, and screen readers. Use the F key to switch between Clear and Flag, and right-click to do the opposite of the current mode.
- Goal
- Narrow down the location of the black hole from numbers and spaces, and open all cells without black holes using Flag.
ABOUT THE GAME
Only the cells that should be opened,
Calculate from numbers.
``PROXX'' is a puzzle for browsers set in space, released by Google Chrome Labs in conjunction with Google I/O 2019. There may or may not be a black hole behind an unopened cell, and the goal is to open all cells without a black hole. Use the two operations Clear and Flag based on the number and blank space in the opened cell.
CLEAR, COUNT, FLAG
Blanks are zero,
Numbers are in 8 surrounding cells.
The official How to play explains that the number in the open cell indicates the number of black holes in the surrounding 8 cells, and if it is blank, there are no black holes nearby. You can place a Flag on cells that you think are holes. When you attach the required number of Flags around the number, the clue becomes active, and by selecting it, you can open the surrounding cells without Flags all at once.
Actual play photography: Detour Playlist Editorial Department / Production: Google Chrome Labs / Visual design concept: Tokyo Wolf
Separate safe cells using numbers in 8 directions and Flag
The number is the number of black holes in the surrounding 8 cells including the top, bottom, left, right, and diagonals. Blank space indicates zero perimeter. Use Clear to open the cells judged to be safe, and use Flag to narrow down the entire board while leaving black hole candidates.
Setting the board surface from Easy to Custom
The starting screen has difficulty levels of Easy, Medium, Hard, and Custom, and displays the board's Width, Height, and Black holes. Custom allows you to change the width, height, and number of black holes to create a configuration different from the fixed preset.
Overlap Canvas display and DOM operation panel
According to the official production article, the screen animation is drawn using WebGL Canvas, and a transparent HTML table button is placed on top of it. Although it looks like Canvas, it uses DOM for operation and focus management, making it compatible with mouse, keyboard, touch, D-pad, and screen readers.
PLAY NOTES
Play notes
- Difficulty level/time required
- You can choose Easy, Medium, Hard, or Custom. Custom allows you to change the board size and number of black holes. There is no fixed duration, there is a timer during the game
- Price/Language
- There are no price displays or purchase procedures, and you can start without an account. The current official web version UI is in English, Japanese display is unconfirmed.
- Save/Data
- Highscores and settings are saved on your device. Google Analytics records basic visit data and advises that no other data will be sent to the server.
- Compatible environment/display settings
- Targets desktops to feature phones, and also supports D-pad and number keys. Animations and Vibrate can be toggled independently
Count the numbers,
Open safe cell.
On July 25, 2026, we confirmed the official web version, information screen, Google official production article/performance commentary, and official repository. The two images are in-game screens taken by the editorial department on the official web version. Sources: PROXX official web version, Official Google "Introducing PROXX", Google official PROXX performance commentary, PROXX Official Repository
STREAMING INFO
Streaming and video uploads
In the information screen of the official PROXX web version, Google's official production articles and performance commentary, and the scope of the official repository, we were unable to confirm a dedicated policy that allows the general public to perform live broadcasts, video posting, and monetization. The release of code in the official repository, the ability to play for free, and the license on the web.dev article side have not been replaced with permission to use game images and visual design. If you plan to distribute or monetize your content, please contact Google Chrome Labs for the latest terms, credits, and handling of audio/visual materials.
“Unconfirmed” does not mean streaming is prohibited. We have not confirmed an official policy for the general public.
READER COMMENTS
Comments on PROXX
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