Even Keel

Algebra puzzle game
1 player
Phones and computers

Even Keel is an algebra puzzle game that plays in the browser on phones, tablets and computers, for one player.

Keep a cargo boat level by taking the same off both decks until one mystery crate stands alone. Take crates or weights in pairs, one from each side, or halve every pile at once when all of them are even. Once the crate is alone, the working is written out as an equation, line by line, across 70 boats.

Play Even Keel

How to play

Tap a weight on one deck, then a weight on the other: the pair comes off
Keep taking the same from both sides until the crate stands alone
Fewer moves earn more stars. The working is written out once the crate is alone

The game shows these steps as you play, the first time.

Controls

Tap a pile, then the same kind on the other deck, or drag between them
C crate pair, W weight pair, H halve, U undo, R restart
Esc pauses

Tips

Halve before you pair: on a boat with 4 crates and 6 weights against 2 crates and 10 weights, halving first finishes in 5 moves instead of 9.
A crate only pairs with a crate and a weight with a weight; when the lone crate faces 5 weights, it weighs 5.
Undo is free. Stars count only the moves left in your final route: par earns three, up to two over par earns two.

What does the boat have to do with equations?

Each deck is one side of an equation: crates are the unknown x and weights are ones. A level boat means both sides are equal, so taking the same off both sides keeps it level, exactly like solving 2x + 3 = x + 7 by hand.

When can I use Halve?

Only when every pile on both decks is an even number, including zero. Halve takes half of everything at once, which is dividing both sides by two. From boat 17 onwards most boats need it, and halving early usually saves moves.

About this game

Made by Sucia in Houston, Texas. Built with AI assistance, designed and tested by Sucia. Last updated October 9, 2026. It plays in the browser on phones, tablets and computers, with no download and no sign-in; your best scores and progress stay in this browser on this device. Without a pass, every game is free for 5 minutes a game and 30 minutes a day; an Arcade pass removes the limit. How Sucia makes and tests its games.

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