Cognivo

Strategy games for one player, two, or thirty-two.

Eight two-player classics, from chess to Hex, a set of cipher puzzles, and two arcade games. Play the computer, send a friend a link, or run a bracket for the whole group. Free in your browser, and nobody needs an account.

Play the computer

Ways to play

Against the computer

Every board game has an easy, a medium and a hard opponent. Pick one and play straight away.

Against a friend

Choose a game and get a private link. Whoever opens it first takes the other seat.

In a tournament

One link for a group of 3 to 32. A random bracket, with every match in a round played at once.

Choose a game

Eleven games. Each one starts in seconds, with nothing to install.

Chess

The deepest game here, with a computer that plays at three strengths.

  • Play a friend
  • Voice moves
  • Memory training

Checkers

Forced captures and kings. Every jump you must take is one they planned.

  • Play a friend
  • Classic

Reversi

Trap a line of discs and they all turn. Corners are permanent, and decisive.

  • Play a friend
  • Three board sizes

Connect Four

Drop a disc and it falls. Four in a line wins, and the centre column decides it.

  • Play a friend
  • Quick
  • Three board sizes

Nine Men's Morris

Place nine men, then slide them. Three in a line takes one of theirs.

  • Play a friend
  • Ancient

Ultimate Tic-Tac-Toe

Nine boards in one. The cell you take decides where your opponent plays next.

  • Play a friend
  • Quick
  • Nine boards

Hex

Join your two edges before they join theirs. It can never end in a draw.

  • Play a friend
  • Quick
  • Never a draw

Dots and Boxes

Close a box and go again. The trick is who runs out of safe moves first.

  • Play a friend
  • Quick
  • Pencil and paper

Spy Games

Timed cipher missions: Caesar, substitution, signal scramble and dead drop.

  • Quick
  • Solo puzzles
  • Four ciphers

Arcade

Quick to pick up, made with our own tools.

Ember

A small flame crosses the night to light a lantern. Run, jump, dodge the water and spikes, and land on the drips to turn them to steam.

  • New
  • Platformer
  • Ten levels
  • Keyboard or touch

Delve

Carry a lamp through a dark cave to the stairs down. Each key opens one door, and the bats and spiders do not care that you are in a hurry.

  • New
  • Top-down
  • Keys and doors
  • Ten levels
  • Keyboard or touch

What comes with every board game

Three strengths of computer

Easy, medium and hard in every board game, so the same board works for a first try and a hard look.

People, without accounts

A duel is one link and a tournament is one link and a bracket. A name is optional and lasts as long as the room.

A lesson for every game

Watch a move play out, then try it yourself on the board. The full notes can be read to you aloud.

Voice and access

Speak your chess moves. The two sides' colours stay apart for colour-blind players, and motion calms down when your system asks it to.