Drop four in a row. Play locally, challenge the Sifaka AI, or meet another player over Nostr relays. Public matches, private invite links, profile identities, and game chat are supported.
CONNECT FOUR BOARDLocal game · Red to move
Choose a column to drop a disc. Connect four horizontally, vertically, or diagonally. Red Yellow
SIFAKA CONNECT FOUR
Game over
The match has ended.
SIFAKA CONNECT FOUR
Choose your opponent
Choose whether to play against the engine or another person. Human matches can be local or synchronized through Nostr.
MATCH LINK
Your game is ready
Copy the complete match link and share it with your opponent.
NOSTR MATCHMAKING
Open / Current Games
Public matches are discovered from Nostr relays. Current games show matches involving your connected account. Private games only appear from your own saved match links.
Connect to relays to find games.
Select Refresh to query Nostr relays.
NOSTR INVITATION
Invite a player
Search by display name, npub, hexadecimal public key, NIP-05 address, or your follow list. Encrypted DMs require a connected signer that supports NIP-04; the shareable game link always remains available.