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Life & fun · May 30, 2026

PA

Phive, a Gomoku-like game to play with friends or solo

In 2025, my family and I had a long streak of playing a Gomoku / Go Bang / five-in-a-row based game called OK Play. I built a web version so that we could play any time we wanted (i.e. on our phones after kiddos went to sleep). The first player to get five-in-a-row (horizontally, vertically, or diagonally) wins. In the first phase of play, players take turns placing their pieces next to existing pieces (always edge-to-edge; you can't place a piece with only a corner-to-corner connection). After players exhaust their pieces, play moves into the movement phase: you pick up an…

In plain words

Phive is a web-based five-in-a-row board game where players compete to align five pieces horizontally, vertically, or diagonally. Players can compete against friends or solo. The game unfolds in two phases: first, players place new pieces adjacent to existing ones, then move their existing pieces while maintaining connectivity. It's designed for casual play on phones and was built using the Phoenix framework.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

In 2025, my family and I had a long streak of playing a Gomoku / Go Bang / five-in-a-row based game called OK Play. I built a web version so that we could play any time we wanted (i.e. on our phones after kiddos went to sleep). The first player to get five-in-a-row (horizontally, vertically, or diagonally) wins. In the first phase of play, players take turns placing their pieces next to existing pieces (always edge-to-edge; you can't place a piece with only a corner-to-corner connection). After players exhaust their pieces, play moves into the movement phase: you pick up an existing piece you own and place it according to the previous placement rules. During the movement phase, you cannot move a piece that would leave other pieces disconnected. Play continues in player order until someone wins. I wrote the app using Elixir's Phoenix framework with Daisy UI / Tailwind CSS for styling. The app is deployed on Gigalixir via its generous free plan. I am by no means a frontend developer / designer, so there's for sure better ways to implement things than what I have here. I mostly focused on making it mobile friendly and getting it to support light and dark mode. There likely exists browser / device specific bugs, since we've only tested it out on our phones (iPhone 13 Pro, Safari / Chrome) and my computer (MacBook Pro, Safari). Happy to hear any suggestions, frontend or otherwise, if you have them! Developing this has been a real journey. Highlights have included learning about Gomoku and its variants, articulation points (and Trajan's algorithm for strongly connected components), and the Monte Carlo tree search algorithm (for the intermediate level "AI" mode I've recently added for single-player use). Lowlights have all been CSS related. I'd love to add a "matchmaking" mode in the future. I haven't really looked too much into the mechanics for how that's usually done though - it'll be a great learning opportunity!

Does the same job

all alternatives →
  • Voronoi Go10d ago · voronoigo.com · ▲155

    I posted once before but wanted to share again because a lot has changed. There's now a fairly strong bot to play against (contributed by a community member) and also correspondence games. The combination of these things helps a bit in finding people to play against.

  • Monsiv2018 · ▲74

    Fast, simple game but with real deep strategy

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    Tiao, A two-player turn-based board gameApr 2026 · playtiao.com · ▲77

    Hi HN, I built this digital version of Tiao, a two-player turn based strategy board game. Think Checkers meets Go. It's free, runs in the browser, has multiplayer, AI, over the board mode and a lot of other neat things. The source is on GitHub (AGPL). The game was originally designed by my friend Andreas Edmeier. He created the rules and has been playtesting and refining the game design for years. I built the website for it. The core in about 2 weeks using TypeScript, Next.js, Express, Websockets, and MongoDB. Fully dockerized, deployed on a Hetzner VPS with Coolify. Authentication with…

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    We are working on this side side project since few weeks. Our goal is to design a fully email based game, with graphics and everything. The main concept is a battle between two sorcerers. It’s turn-based, and you send commands by replying to emails you receive. At the moment, you can move your sorcerer, and attack your opponent. New and exciting things are coming soon! To launch a game, you only need to send an email to [email protected] and a friend of yours. The game is fully open-source, including artworks. What are your thoughts? Game: http://cursend.us/ GitHub:…

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    Free mini-games & puzzles. No signup, just play.

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    Chinese board games, play in your browser. Free, no signup.`

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