Gambit
A gambit is when you give something up early to get something better, like the pawn White offers in the King’s Gambit.
The story
Castle Gambit is a web app for over-the-board chess at local clubs, named after an opening that doesn’t exist.
Until then, there’s nothing to download: Castle Gambit runs in your phone’s browser.

The name
Castle Gambit comes from two words every chess player learns early. Here’s what each one does on the board.
What O-O and !? mean, and how to write them down:
Castling, promotion and en passantHow to write chess notation on a scoresheet · 8 minA gambit is when you give something up early to get something better, like the pawn White offers in the King’s Gambit.
Castling is when you tuck your king behind a wall of pawns and a rook so nothing can reach it.
One is a risk. The other is the opposite of a risk.
In four hundred years of chess, nobody put them together.
Club night
Every player who has ever walked into a club night has put them together. You give up an evening: the couch, the phone, the certainty of playing someone you’ll never meet. You make a small, real sacrifice and sit down across from a stranger. What you get back is the thing every king is looking for: a castle. A place where your people are.
The room, the code and the first handshake, in more detail:
How to get a gameWhat to expect at your first chess club night · 8 minWhat Castle Gambit is
Castle Gambit is a web app for chess at your local club, and it speaks the story’s language. Every club here is a Castle: a real room in a real town with real boards. Every open game, meetup and tournament is a gambit: an offer out in the open, waiting for someone to accept it.
On club night, that means:
The words, as we use them
In chess: what every beginner calls the rook.
Here: a chess club. A real room, in a real town, with real boards.
Find a Castle near youIn chess: giving something up early to get something better. The first fancy word you learn.
Here: an open offer anyone can accept: an open game, a meetup or a tournament. Accepting one means you’re coming.
See open gambitsIn chess: a king tucked behind its wall, like the one on the Castle card above.
Here: you have a home Castle, and it comes first everywhere.
In chess: nothing. We looked it up.
Here: all of the above, on your phone, on club night.
The name belongs to the beginner who still says castle and the master who plays gambits. Same product, friendlier door.
Guides
This page is the short version. The guides are the long one: plain words about club chess, with more drawings like the Board 4 room, for players and for the people who run the room.
Your move
Find a club near you, pick a night and walk in: your first game doesn’t even need an account. No club in your town yet? Start one.