Dev tools · alternatives · 2026
24 alternatives to DuoQi
Chess & Xiangqi on two phones—no internet needed
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Hi HN! I'm the developer of rdx, a mildly popular ad-free, privacy and user friendly Reddit client. This time, I made something for a very specific use case: solving chess puzzles with no internet. Why? Well, my Wi-Fi is terrible in the bathroom—and that's where I do some of my best thinking. I tried printing out “mate in X” puzzles to solve offline, but they weren’t fun without interaction. So I built OffChess. OffChess is an iPhone/Android app that contains over 100,000 chess puzzles, fully offline and completely ad-free. You can solve puzzles by category (Mate in…
2025 · offchess.com · its alternatives →
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Hi HN! I built a simple chess game so that my son in Singapore can play chess with his grandfather in China. Why? There is currently no service or open source software that has all of the following: * All processing and assets on a single server (Critical to workaround a firewall) * No email account required (Chinese Internet services typically login via WeChat) * Works on Android browser * Simple to install and config I built it, together with Claude Code, using simple and boring technologies (Django + Client-side JS). I hope that when you use it, you will find it simple to understand…
2025 · github.com · its alternatives →
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2020 · rootshirechess.glitch.me · its alternatives →
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Play real-time chess with friends and players worldwide.
Jan 2026 · play.google.com · its alternatives →
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ChessEye▲822D chessboard scanner & analyzer to calculate the best moves
2021 · play.google.com · its alternatives →
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I made a chess engine today, and made it fit within 2KB. I used a variant of MinMax called Negamax, with alpha beta pruning. For the board representation I have used a 120-cell "mailbox". I managed to squeeze in checkmate/stalemate in there, after trimming out some edge cases. I am a great fan of demoscene (computer art subculture) since middle school, and hence it was a ritual i had to perform. For estimating the Elo, I measured 240 automated games against Stockfish Elo levels (1320 to 1600) under fixed depth-5 and some constrained rules, using equal color distribution. Then converted…
Feb 2026 · github.com · its alternatives →
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Invite your friends to play chess with you in real time!
2016 · its alternatives →
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BreakBase.com. Play your favorite games, with anyone you
2012 · breakbase.com · its alternatives →
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Play chess with friends anywhere + no internet required
May 2026 · play.google.com · its alternatives →
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blunderchess.net is an open source, peer-to-peer chess app where every five moves, players each get to make one blunder-move for their opponent
2025 · blunderchess.net · its alternatives →
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Play chess directly from your keyboard 🐴
2015 · apps.apple.com · its alternatives →
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DualChess▲25Chess — but a mini-game decides every capture
Jun 2026 · dualchess.com · its alternatives →
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Chess, but each square also follows the rules of Conway's Game of Life. Only your own pieces count as neighbours when deciding births/deaths. For births, an empty square must have 3 neighbours for 2 consecutive turns. For deaths, a piece must have 3 neighbours for 3 consecutive turns. This is a simple proof of concept I made with python and curses. You can play with a friend locally or over a socket connection. Controls: Arrow keys to move the cursor, enter/space to select and move a piece, u or backspace to undo a move, r to redo a move, q or escape to quit, s to perform a move…
2023 · gist.github.com · its alternatives →
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Spicy Chess▲76Hello! I created SpicyChess(https://spicychess.com) because I wanted a tactics training app that would have the following features: - Spaced Repetition. - Countdown time to simulate blitz Chess where you have to find the best move quickly. - The ability to save puzzles for later review. I'd love to hear any feedback that you may have !
2023 · spicychess.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →