{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"tool_llmchess","slug":"llmchess","name":"LLMChess","type":"webapp","url":"https://llmchess.org","page_url":"https://unfragile.ai/llmchess","categories":["automation"],"tags":[],"pricing":{"model":"free","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"tool_llmchess__cap_0","uri":"capability://planning.reasoning.llm.based.move.generation.with.model.selection","name":"llm-based move generation with model selection","description":"Generates legal chess moves by prompting OpenAI language models (gpt-3.5-turbo or gpt-4) with the current board state, then parsing the LLM's text output into valid moves. The system maintains game state on the client side and sends the full board position to the LLM with each turn, relying on the model's chess knowledge to produce legal moves without explicit move validation against a rules engine.","intents":["Play chess against an AI opponent that understands strategic concepts","Compare move quality between different OpenAI models (3.5 vs 4)","Get chess moves generated by a general-purpose LLM rather than a specialized engine"],"best_for":["Casual chess learners exploring how LLMs approach chess","Developers prototyping LLM-based game AI without specialized chess libraries","Players interested in educational commentary alongside moves"],"limitations":["LLM move generation is significantly weaker than Stockfish or Lichess engines — expect 1200-1800 Elo equivalent performance","No explicit move validation; relies on LLM to generate legal moves, risking illegal move generation on edge cases or complex positions","Inference latency of 2-10 seconds per move (depending on model and API load) vs instantaneous traditional engines","No support for time controls, blitz, or rapid formats — only untimed games","Token usage per move (typically 500-2000 tokens) creates per-game cost exposure with OpenAI API"],"requires":["OpenAI API key with access to gpt-3.5-turbo or gpt-4","Google Chrome browser (compatibility with other browsers undocumented)","Internet connectivity for API calls to OpenAI","Active OpenAI account with available API credits"],"input_types":["text (current board state in FEN or algebraic notation)","model selection (dropdown: gpt-3.5-turbo or gpt-4)"],"output_types":["text (move in algebraic notation, e.g., 'e2-e4')","structured game state (board position after move)"],"categories":["planning-reasoning","game-ai"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_1","uri":"capability://text.generation.language.real.time.strategic.analysis.and.move.explanation","name":"real-time strategic analysis and move explanation","description":"Generates natural-language explanations of AI moves by extracting reasoning from the LLM's output during move generation. The system logs these explanations in a right-side pane, allowing players to understand the strategic intent behind each move without requiring a separate analysis pass. This leverages the LLM's ability to articulate reasoning as part of its move selection process.","intents":["Understand why the AI chose a particular move","Learn strategic chess concepts through AI commentary","Review game decisions with educational context rather than just move sequences"],"best_for":["Chess learners and hobbyists seeking to improve understanding of strategy","Students using chess as a tool to learn AI reasoning and decision-making","Non-competitive players who value education over winning"],"limitations":["Explanations are generated by the same LLM making the move, so they may rationalize weak moves rather than provide objective analysis","No independent verification of explanation accuracy — LLM may confabulate strategic reasoning","Explanations are not searchable or filterable; only visible in chronological game log","No option to disable explanations to reduce token usage and API costs","Explanations are in English only; no multi-language support documented"],"requires":["OpenAI API key (same as move generation)","Browser with JavaScript enabled to render game log pane"],"input_types":["board state (implicit, derived from move generation context)"],"output_types":["text (natural-language explanation of move strategy)","game log (chronological list of moves with explanations)"],"categories":["text-generation-language","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_2","uri":"capability://planning.reasoning.adaptive.difficulty.scaling.based.on.player.skill","name":"adaptive difficulty scaling based on player skill","description":"Adjusts AI move strength by selecting between gpt-3.5-turbo (weaker, faster, cheaper) and gpt-4 (stronger, slower, more expensive) based on player performance or explicit selection. The system may also implement prompt-level difficulty adjustments (e.g., instructing the LLM to play 'cautiously' or 'aggressively'), though the exact mechanism is not documented. This allows the same system to serve beginners through intermediate players without requiring multiple chess engines.","intents":["Play against an opponent that matches my current skill level","Gradually increase difficulty as I improve","Choose between faster games (3.5) and stronger opponents (4)"],"best_for":["Beginner to intermediate chess players (1000-2000 Elo equivalent)","Players who want to improve without being overwhelmed by a world-class engine","Casual learners who prefer adaptive challenge over fixed difficulty"],"limitations":["Only two difficulty levels available (gpt-3.5-turbo vs gpt-4); no granular difficulty tuning","No documented Elo rating system or skill assessment — difficulty selection is manual or based on undocumented heuristics","gpt-4 is still weaker than Stockfish at all time controls, so even 'maximum difficulty' is limited","No documented mechanism to track player improvement or auto-adjust difficulty over time","Switching models mid-game requires restarting, creating friction in the learning experience"],"requires":["OpenAI API key with access to both gpt-3.5-turbo and gpt-4","Model selection dropdown in UI"],"input_types":["model selection (gpt-3.5-turbo or gpt-4)"],"output_types":["move strength (implicitly varies by model)"],"categories":["planning-reasoning","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_3","uri":"capability://automation.workflow.browser.based.game.state.management.and.ui.rendering","name":"browser-based game state management and ui rendering","description":"Maintains the current chess board state in the browser (likely using JavaScript and HTML5 Canvas or SVG), renders the board visually, handles user input for move selection (click-to-move or drag-and-drop), and updates the display after each move. The system persists game state in memory during a session and provides UI controls for starting new games and ending the current game. No backend persistence is documented, so games are lost on page reload.","intents":["Play chess in a web browser without installing software","See the board state visually updated after each move","Start and end games with simple UI controls"],"best_for":["Casual players who want instant access without installation","Users on shared computers or restricted environments where software installation is not possible","Players who prefer browser-based tools over desktop applications"],"limitations":["No game history or replay functionality — games are lost when the page is closed or reloaded","No offline mode; requires internet connectivity for both UI and API calls","Browser-only; no mobile app or native desktop client documented","No support for custom board themes, piece sets, or UI customization","No accessibility features documented (screen reader support, keyboard-only navigation, etc.)","Performance may degrade with very long games (100+ moves) due to in-memory state accumulation"],"requires":["Google Chrome browser (other browsers untested)","JavaScript enabled","Internet connectivity"],"input_types":["mouse clicks or drag-and-drop (move selection)","button clicks (Start, End game)"],"output_types":["visual board rendering (HTML5 Canvas or SVG)","game log text (move list with explanations)"],"categories":["automation-workflow","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_4","uri":"capability://tool.use.integration.openai.api.integration.with.model.selection","name":"openai api integration with model selection","description":"Integrates with OpenAI's API by accepting a user-provided API key, sending board state and move requests to either gpt-3.5-turbo or gpt-4 endpoints, and parsing the LLM's text response to extract the move. The system handles API authentication, request formatting, and response parsing, but does not implement retry logic, rate limiting, or cost controls. Users are responsible for managing their own API keys and monitoring token usage.","intents":["Use my own OpenAI API key to play chess without paying a subscription","Choose between cheaper (3.5) and stronger (4) models based on my API budget","Integrate LLM-based chess into my own OpenAI API account"],"best_for":["Developers with existing OpenAI API accounts","Users who want to avoid subscription fees and pay only for API usage","Teams exploring LLM-based game AI as a proof-of-concept"],"limitations":["Requires users to provide their own API key in the browser, creating security risk if the site is compromised or uses HTTP instead of HTTPS","No documented rate limiting or cost controls — users can accidentally incur large bills if left playing for extended periods","No retry logic or error handling for API failures; a single API error terminates the game","No support for other LLM providers (Anthropic, Ollama, local models, etc.) — OpenAI-only","No token usage tracking or cost estimation in the UI","API key is transmitted with each move request, increasing exposure window"],"requires":["OpenAI API key with access to gpt-3.5-turbo or gpt-4","Active OpenAI account with available API credits","HTTPS connection (assumed but not documented)"],"input_types":["API key (text input)","model selection (dropdown)","board state (implicit, sent with each move request)"],"output_types":["move (parsed from LLM response)","explanation (extracted from LLM response)"],"categories":["tool-use-integration","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_5","uri":"capability://text.generation.language.game.logging.and.move.history.display","name":"game logging and move history display","description":"Captures each move and its associated AI explanation in a chronological game log, displaying the log in a right-side pane that updates in real-time as moves are made. The log includes move notation (e.g., 'e2-e4') and the LLM's natural-language explanation of the move's strategic intent. The log is rendered as text in the UI and is not persisted beyond the current session.","intents":["Review the sequence of moves made during the game","See the AI's reasoning for each move in context","Understand the game's progression without replaying it"],"best_for":["Players who want to study their games after playing","Learners who benefit from seeing AI reasoning alongside moves","Casual players who don't need advanced analysis tools"],"limitations":["Game log is not persisted; it disappears when the page is closed or reloaded","No export functionality (no PGN, CSV, or text download)","No filtering or search within the game log","No move annotations or variations — only the main line is logged","Log display may become cluttered or hard to read in very long games (100+ moves)","No option to hide explanations to reduce visual clutter"],"requires":["Browser with JavaScript enabled","Sufficient screen space for right-side pane (may be cramped on mobile or small screens)"],"input_types":["moves (implicit, generated during gameplay)"],"output_types":["text (move notation and explanation)","visual log (rendered in right-side pane)"],"categories":["text-generation-language","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_llmchess__cap_6","uri":"capability://automation.workflow.free.no.paywall.access.with.per.game.api.cost.transparency","name":"free, no-paywall access with per-game api cost transparency","description":"Offers completely free access to the chess interface and gameplay without subscription fees or account creation. Users pay only for OpenAI API usage (typically $0.01-0.10 per game depending on move count and model selection). This model eliminates platform subscription costs but requires users to manage their own API credentials and monitor token usage. No freemium tier or trial credits are documented.","intents":["Play chess without paying a subscription fee","Control my spending by choosing cheaper models (3.5) or shorter games","Avoid account creation and personal data collection"],"best_for":["Budget-conscious players who want to avoid subscription fees","Developers experimenting with LLM-based games without platform lock-in","Users who prefer pay-per-use models over subscriptions"],"limitations":["Requires OpenAI API account and active credits — no free trial or demo mode documented","No cost estimation or budgeting tools in the UI; users must manually calculate token costs","No rate limiting or spending caps; users can accidentally incur large bills","No freemium tier for casual play — all games incur API costs","API costs may exceed subscription fees for heavy users (e.g., 10+ games/day at $0.05-0.10/game = $1.50-3.00/day)"],"requires":["OpenAI API account with active credits","No account creation on LLMChess platform (uses OpenAI credentials directly)"],"input_types":["OpenAI API key"],"output_types":["access to full chess gameplay"],"categories":["automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":39,"verified":false,"data_access_risk":"low","permissions":["OpenAI API key with access to gpt-3.5-turbo or gpt-4","Google Chrome browser (compatibility with other browsers undocumented)","Internet connectivity for API calls to OpenAI","Active OpenAI account with available API credits","OpenAI API key (same as move generation)","Browser with JavaScript enabled to render game log pane","OpenAI API key with access to both gpt-3.5-turbo and gpt-4","Model selection dropdown in UI","Google Chrome browser (other browsers untested)","JavaScript enabled"],"failure_modes":["LLM move generation is significantly weaker than Stockfish or Lichess engines — expect 1200-1800 Elo equivalent performance","No explicit move validation; relies on LLM to generate legal moves, risking illegal move generation on edge cases or complex positions","Inference latency of 2-10 seconds per move (depending on model and API load) vs instantaneous traditional engines","No support for time controls, blitz, or rapid formats — only untimed games","Token usage per move (typically 500-2000 tokens) creates per-game cost exposure with OpenAI API","Explanations are generated by the same LLM making the move, so they may rationalize weak moves rather than provide objective analysis","No independent verification of explanation accuracy — LLM may confabulate strategic reasoning","Explanations are not searchable or filterable; only visible in chronological game log","No option to disable explanations to reduce token usage and API costs","Explanations are in English only; no multi-language support documented","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.31666666666666665,"quality":0.67,"ecosystem":0.15000000000000002,"match_graph":0.25,"freshness":0.75,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.1,"match_graph":0.35,"freshness":0.05}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:31.447Z","last_scraped_at":"2026-04-05T13:23:42.560Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=llmchess","compare_url":"https://unfragile.ai/compare?artifact=llmchess"}},"signature":"dGWE2+L7/FIC9SkeP1LM895nK3lNcjGBSDbP8570ilCyhq8HYc6gOvVb8sMmvm60U+0gda5+pTZh61GPrazJDA==","signedAt":"2026-06-21T01:01:04.374Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/llmchess","artifact":"https://unfragile.ai/llmchess","verify":"https://unfragile.ai/api/v1/verify?slug=llmchess","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}