Study Hall
Every lesson, from how the knight moves to why you shouldn't trust it. Each one is played on a real board, right here. No sign-in needed, and nothing is saved.
Start here: the tutorial
Beyond the basics
The rules that make this more than chess with cards. These all come from Built Deck cards.
Piece stacks →
Two pieces on one square: which one moves, and what a capture takes.
Beyond the edge →
Open the ground past the board's border, and march a piece out onto it.
The margins →
Park a piece off the board where nothing can reach it, and the card that ends it.
Card families
Every card does at least one of six jobs. They're the six points of the chart on each deck, so a deck heavy on one is easy to spot, and so is a deck with a gap.
Attack
Take, weaken or push around the other side's pieces, or drain their Braincells and clock.
Defense
Shield and armour your own pieces, or get them out of harm's way.
Trap
Leave something on the board for the other side to walk into, or a wall in their way.
Modification
Bend the rules: new ways for a piece to move, extra moves, a board that slides or turns.
Vision
See what's hidden: the other side's hand, or the cards coming up next.
Regain
Win back what you've lost or spent: captured pieces, discarded cards, Braincells.