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Client sites
Checkmate Arena
A real-money chess platform where a Solidity escrow holds the stake and a server-authoritative engine decides the result.
- Problem
- Chess played for real stakes needs a result no player can dispute and an escrow no player can drain.
- What we shipped
- A Solidity escrow holding the stake with deterministic payout, and a server-authoritative engine validating every move and timer, so the client can never assert an illegal result. Reconnect and abandoned-game handling, an audit trail over every financial event, and rate limiting on the write paths.
- Where it stands
- Live at checkmate-arena.com, run by the client.

What we built
- Escrow contract handling wallet deposits, fee locking and deterministic payout distribution.
- Server-authoritative move validation with timer enforcement, so the client can never assert an illegal result.
- Real-time player-versus-player infrastructure with reconnect and edge-case handling for abandoned games.
- Audit trail over every financial transaction and match event, plus rate limiting on the write paths.