Does access cost anything or involve betting?

It costs nothing: all seven games are open right in your browser, with no charge of any kind. The site shows no advertising and never bills you in any way. There is also no betting, no cash prizes, and no drawings of any kind: it is purely a space for reasoning.

Do I need to sign up or provide personal information?

No. You come in and can play right away, with no sign-up form and no collection of data that identifies you. Scores and settings are kept only in your own browser's local storage.

How many games are available right now?

Right now, seven: Towers of Hanoi, Peg Solitaire, Mastermind, Lights Out, Maze, Digit Memory, and Stroop, all open with nothing to download and no login to create.

Do the pages work well on phones and tablets?

They do. The layout adjusts automatically to the screen size, and the controls respond to touch as well as to a mouse or keyboard.

Strictly technical cookies may run to keep the site working. The optional cookie that saves your game progress ('Game state') is only turned on after you explicitly accept it in the cookie banner. See the Cookie Policy for more.

Exercise your mind. For free.

Seven brain-teaser puzzles in English (Towers of Hanoi, Peg Solitaire, Mastermind, Lights Out, Maze, Digit Memory, and Stroop), each with its own page, rules, tips, and an FAQ section. All free, in your browser, no sign-up.

Towers of Hanoi

Move the stack of disks in the fewest moves

Peg Solitaire

Jump the pegs until only one is left (a timeless classic)

Mastermind

Crack the color code by deduction

Lights Out

Turn off every light on the grid

Maze

Find the path to the exit

Digit Memory

Memorize the positions and tap them in order

Stroop

Answer with the ink color, not the word

Lab protocol

Total transparency

Stored in your browser, and nowhere else. Your progress and cookie choices stay in your device's local storage.
No installing, no waiting. The page loads and the puzzle is ready, no app store required.
Fully playable by keyboard. Tab, Enter, and the arrow keys do it all, with text announcements after every move.
100% free. The site has no ads, subscriptions, or charges of any kind: it is run independently.

Logic, never luck

Cortex Jogos Web is a skill games site. The outcome depends on your decisions, not on chance. There is no betting, no cash prize, and no drawing, so it is neither gambling nor a betting site. The details are in the Terms of Use.

Behind the scenes

Where Cortex Jogos Web comes from

Cortex Jogos Web is a small, straightforward project: free brain-teaser puzzles in English, with no sign-up and no collecting your data. No betting, prizes, or real money, just the satisfaction of solving. Meet the people who run the site and find out how to reach us.

Get to know Cortex Jogos Web

Before you play