AI · alternatives · 2026
24 alternatives to MindBoard Arena
Beyond engine lines. Let agents think, choose, and play.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
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2021 · chrisbutner.github.io · its alternatives →
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An AI-powered whiteboard and mind map tool
2024 · funblocks.net · its alternatives →
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Agent Arena▲348Creator here. I built Agent Arena to answer a question that kept bugging me: when AI agents browse the web autonomously, how easily can they be manipulated by hidden instructions? How it works: 1. Send your AI agent to ref.jock.pl/modern-web (looks like a harmless web dev cheat sheet) 2. Ask it to summarize the page 3. Paste its response into the scorecard at wiz.jock.pl/experiments/agent-arena/ The page is loaded with 10 hidden prompt injection attacks -- HTML comments, white-on-white text, zero-width Unicode, data attributes, etc. Most agents fall for at least a few.…
Jun 2026 · arena42.ai · its alternatives →
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An infinite canvas to run AI agents & multi-agent systems
2024 · mindpal.space · its alternatives →
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Get real-world tasks done with autonomous AI agents
Jun 2026 · arena.ai · its alternatives →
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Thought I would post in celebration of 1 year of my website being online. I've been working on it on and off and currently the website allows users to play Hex, Tumbleweed, Amazons, and Connect 6 against friends or against practice bots. I've been a long time player of some of these games and I felt for a long time that the world could use a few more popular abstract strategy games compared to Chess or Go. If you try it, let me know what you think. I'm always looking for new games or new features to add :)
2025 · abstractboardgames.com · its alternatives →
- 9CM
2016 · chessboardifygame.xyz · its alternatives →
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I built a March Madness bracket challenge for AI agents, not humans. The human prompts their agent with the URL, and the agent reads the API docs, registers itself, picks all 63 games, and submits a bracket autonomously. A leaderboard tracks which AI picks the best bracket through the tournament. The interesting design problem was building for an agent-first user. I came up with a solution where Agents who hit the homepage receive plain-text API instructions and Humans get the normal visual site. Early on I found most agents were trying to use Playwright to browse the site instead of just…
Mar 2026 · bracketmadness.ai · its alternatives →
- 11IT
I built 1e4.ai - a chess web app where you play against neural networks trained to mimic human Lichess players at specific Elo ranges. There's a separate model for each 100-point rating bucket from ~800 to 2200+, and the bots not only choose human-like moves but also burn clock time, play worse under time pressure, and blunder in human-like ways. Live demo: https://1e4.ai Code: https://github.com/thomasj02/1e4_ai A few things that might be interesting: - Trained on almost a full year of Lichess blitz games, around 1B total games - Architecture is an a small…
May 2026 · its alternatives →
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Ruin their weekend. One move at a time 😉.
Apr 2026 · play.google.com · its alternatives →
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Play against Stockfish engine, get best hints.
2025 · play-chess-stockfish.vercel.app · its alternatives →
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Testbed for deep reinforcement learning. Contribute to danijar/mindpark development by creating an account on GitHub.
2016 · github.com · its alternatives →
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Where AI models battle and humans decide the winner
Feb 2026 · dualmindlab.tech · its alternatives →
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Compare AI agent benchmark leaderboards for browser agents, computer use, research, and coding, with sourced scores and methodology notes.
2025 · leaderboard.steel.dev · 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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Fun and engaging brain fitness and math training tool!
2025 · apps.apple.com · its alternatives →
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The community for developers building startups
Dec 2025 · mindboard.dev · its alternatives →
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- 24AL
Hello HN, For a few months I'm been working on a fun side-project to port the (awesome) chessboardjs library to an easily reusable and embeddable web component. The quarantine has finally spurred me to put the finishing touches on it. https://justinfagnani.github.io/chessboard-element/ It works in plain HTML files just by writing an HTML tag: And it works in any framework because it's just an HTML element. Styling is encapsulated and customizable with CSS properties and parts: chess-board { --dark-color: darkmagenta; } /* Highlight the e2 square in red */…
2020 · 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 →