Semantle

Its open-ended, algorithm-based format has inspired numerous spinoffs and popular versions in other languages, including French, Hebrew, Spanish, Polish and German.

• Title — Semantle • Developer — David Turner • Engine — Word2vec • Released — 2022 01 • Genre — Puzzle, Word game • Modes — Single-player, Teams • Platforms — Web browser

Each day, a new secret word is selected by the game's algorithm. The player's objective is to guess the word by submitting other words. There is no limit on the number of guesses a player can make. After each guess, the game provides two forms of feedback: • Similarity Score: A numerical score indicating how semantically similar the guessed word is to the secret word. The game's algorithm, Word2vec, assigns each word a vector in a multidimensional space. The similarity is calculated based on the cosine similarity between the vectors of the guessed word and the secret word. A score of 100 indicates the player has found the exact word, while most unrelated words will have scores near or below zero. • "Getting Closer" Rank: If a guessed word is among the 1,000 words semantically closest to the secret word in the game's dataset, it receives a rank (e.g., "999/1000" for the closest word). This feature helps players know they are on the right track, even if the similarity score is low. Because the game relies on abstract semantic connections rather than concrete spelling rules, players often develop strategies such as "probing" with a diverse set of words (e.g., man, food, building, science, walk) to narrow down the general category of the secret word before attempting to find more closely related terms.

Semantle was created by New York City-based developer David Turner in early 2022, during the peak popularity of Wordle. Turner was inspired by the daily puzzle format but wanted to create a more complex and less finite challenge. He built the game using Google's Word2vec technology, a neural network-based model that processes natural language to determine relationships between words. The specific dataset used is `word2vec_google_news_300`, which contains vectors for a vast vocabulary. Turner intentionally designed the game to be difficult, stating in an interview that he enjoys puzzles that are "unsolvably hard."

The game's format has been adapted into numerous versions, some being direct translations and others changing the core gameplay.

• Polmantle: The Polish-language adaptation. Unlike the original, it incorporates sentences with guiding hints and measures similarity on a 0–100 scale. • Semantle Español: The Spanish-language version, which maintains the original's rules and difficulty. • Semantle (RU): Russian-language version of the game. • Cémantix: A highly popular French-language version that follows the same gameplay principles. It is frequently cited in French media as a major brain-teaser game. • סמנטעל: The main Hebrew-language adaptation of the game, accompanied by סמנטעל פלוס (Semantle Plus), a fan-made archive of past puzzles available at semantle.sigarya.xyz.

• Semantle Junior: An official, easier version of the game created by Turner. It uses a smaller, more common vocabulary, making it more accessible for younger players or those looking for a less intense challenge. • Pédantix: A popular French spinoff of Cémantix where the goal is to uncover the title of a random Wikipedia article. Players guess words, and any word that appears in the article is revealed, slowly allowing the player to piece together the topic. • Semiolex: a French version that replaces word2vec with a more interpretable approach, allowing it to give helpful hints to players.