Life & fun · alternatives · 2026
24 alternatives to SHAllenge – Compete to get the lowest hash
I've always had an appreciation for the properties of hashing. I especially like the concept of Proof of Work, so I tried to make a little competition out of it.
SHAllenge is a competition game based on hashing and proof-of-work concepts. Players compete to generate the lowest possible hash value, combining cryptographic principles with a competitive challenge format. The… 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. SHAllenge – Compete to get the lowest hash launched in 2024; newer entries below may have overtaken it.
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Mobile ZK Puzzle Game with NFT rewards. Contribute to nalinbhardwaj/wordlines development by creating an account on GitHub.
2022 · github.com · its alternatives →
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We're building a different kind of JavaScript engine, based on data-oriented design and willingness to try something quite out of left field. This is most concretely visible in our major architectural choices: 1. All data allocated on the JavaScript heap is placed into a type-specific vector. Numbers go into the numbers vector, strings into the strings vector, and so on. 2. All heap references are type-discriminated indexes: A heap number is identified by its discriminant value and the index to which it points to in the numbers vector. 3. Objects are also split up into object kind -specific…
2024 · github.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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HASH▲127Build complex simulations quickly with modular components
2020 · hash.ai · its alternatives →
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I made this game for my children to play, as they are heavily into Wordle, and I thought they'd also like something maths based! Every puzzle is solvable and has at least one solution (usually more). There is a kids mode in the settings, plus a hard mode for extra difficulty.
2022 · summle.net · its alternatives →
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Hash Heroes▲148A simple Ethereum game where anyone has a shot at glory.
2017 · hashheroes.com · its alternatives →
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A ranked ladder for small neural networks that play strategy games. Train a model, write an adapter, upload two files, and get measured into a weight class from 8 KiB up.
Sep 2026 · tinybrains.dev · its alternatives →
- 9SA
I built this machine so I could generate Bitcoin keys that I could trust. Air-gapped and simple to use and understand (mechanical). The Satoshi 9000 demo: https://youtu.be/bJiOia5PoGE The key value proposition of the machine is that it generates analog randomness in the physical world and converts it into digital (1’s and 0’s) randomness. Seamlessly. But it occurs to me that it may have other uses beyond crypto keys for your own use, such as: * Randomized clinical trials. Clinical trials need a high degree of transparency for ethical reasons; also, for legal reasons should it…
2024 · its alternatives →
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Fill out and generate PDFs with a simple API request. Design templates in our drag-and-drop editor, POST your JSON data, and download a finished PDF in seconds.
2018 · formapi.io · its alternatives →
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Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…
2023 · github.com · its alternatives →
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- 13SZ
2022 · zk-treasure-hunt.glitch.me · its alternatives →
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I created a daily challenge for Prompt Engineers to build the shortest prompt to break a system prompt. You are provided the system prompt and a forbidden method the LLM was told not to invoke. Your task is to trick the model into calling the function. Shortest successful attempts will show up in the leaderboard. Give it a shot! You never know what could break an LLM.
2025 · vaultbreak.ai · its alternatives →
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A Wordle-like game where you have to guess the unsigned 8-bit binary number!
2022 · jamesl.me · its alternatives →
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Numle▲69Fun math numbers game app with mechanics similar to Wordle
2022 · grafing.hr · its alternatives →
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Hi HN, Matle is a daily chess puzzle inspired by Wordle. You're shown a checkmate position with 5 hidden squares, and your goal is to guess what’s on them to complete the mate. Someone kindly shared it here a few months ago before I had the chance to post it myself. I’m the creator, and wanted to share a few new features based on feedback, and hear your thoughts. You can now view the original game behind each puzzle, get explanations for why a guess isn’t checkmate, and see daily solving stats. Would love to hear what you think: https://matle.io
2025 · matle.io · its alternatives →
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Learn to trade crypto and win prizes 🤑🎁
2018 · altcoinfantasy.com · its alternatives →
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A chess engine implementation inspired by AlphaZero, using MLX for neural network computations and Monte Carlo Tree Search (MCTS) for move selection.
2025 · github.com · its alternatives →
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2020 · madhash.telekinesis.cloud · its alternatives →
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Hi HN, I love building small games (as Pong, Wordle, Tetris, etc.), but they're never quite unique enough to justify their own site. So I built boring.game - a daily "boring" game where the social mechanics (predicting your score, challenging other users) is more interesting than the game itself. I started a HN team if you want to compare your results: https://boring.game/invite/SRhyUStjin You can also play all daily games without signing up, if that is what you prefer. Built with SvelteKit (first time using Svelte - loved it!). Would love feedback on both the concept and…
2025 · boring.game · its alternatives →
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Wordle, but with ZK proofs! Contribute to nalinbhardwaj/zordle development by creating an account on GitHub.
2022 · github.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 →