Check’d vs Natural Chess AI

Your move, in every message. Check'd brings real chess to iMessage. Start a match inside any conversation, send moves as interactive messages, and keep playing at your own pace. No accounts, no servers, no spam—just pure chess that lives in your chat history. WHAT'S NEW & FUN • Daily Puzzles — 4,462 unique puzzles, daily rotation, UTC‑based streaks, and fastest‑time leaderboards. • Tactical Alerts — Smart on‑board warnings for hanging pieces, forks, pins, and mate threats (consistent in iMessage + companion app). • Big UI refresh — Modern redesigns for Play vs Computer, iMessage, Tutorials, Opening Guide, and FEN export/import. • Seasonal magic — Halloween, Valentine, Easter, and Winter overlays with animated effects. • Name onboarding — A fun, animated “Chess Oracle” name reveal for new and existing players. • Promotion knows the script — Auto‑promotion follows the puzzle’s expected move (Q/R/B/N) when you’re on the correct line. WHY YOU'LL LOVE CHECK'D • Seamless iMessage play — Moves send as messages and update instantly for both players. • Play vs Computer — Practice anytime with smart difficulty and helpful hints. • Interactive tutorials — Learn castling, en passant, and checkmates with mini‑games. • Full chess rules — Castling, en passant, promotions, 50‑move rule, and threefold repetition. • Replay & history — Browse finished games, replay moves, and jump to key moments. • Shareable recap — Create a beautiful recap card with opening, result, rating change, and mini‑board. • Privacy‑first by design — All game state stays on‑device and in the message thread. • Seasonal flair — Snow, hearts, pumpkins, and Easter effects (toggleable). • Fully localized — Available in 12 languages. GET STARTED 1. Install Check'd from the iMessage App Store. 2. Open any conversation and tap the Check'd icon. 3. Make your first move and send. That’s it. PLAY YOUR WAY Enjoy quick casual games or long, thoughtful matches. Check'd is built for real‑life schedules—play when you can, keep the thread alive, and finish the game in days if you want. COMPANION APP Check'd also includes a companion app with extra info, guides, stats, analysis tools, and settings outside iMessage. ACCESSIBILITY Check'd is designed to be usable by everyone: • Full VoiceOver support — Every menu button, chess square, and piece is labeled for screen readers. • Dynamic Type — Text scales with your system font size preferences. • Haptic feedback — Feel confirmation on moves and alerts for invalid actions. • High contrast pieces — Clear distinction between white and black pieces on all board themes. PRO UPGRADE Unlock advanced insights and power features with Check'd Pro: • Takeback requests with smooth slide‑back animation. • Full analytics dashboard: win/loss/draw breakdown, activity heatmap (games & moves), Elo rating + peak + trend, win streaks, shortest/longest game, and piece‑balance records. • Performance insights: white/black performance split and favorite opponents. • Opening insights: full openings list and win‑rate breakdowns. • Critical moments + Journey replay: best move, blunder, and missed‑chance markers with quick playback. • Move assistance toggles: move hints, capture targets, move dots, last‑move highlight, and tactical alerts. • Board control: rotate board to your side. • Extra customization: additional board and piece themes. • FEN export and PGN tools for analysis in other chess apps. • Best Move requests — Ask the engine for help (3 per game) with visual arrows. • Live engine verdicts — See move strength (Best, Good, Blunder) and checkmate status. • Opening Trainer — Train openings right from the analysis list. Made with care in The Netherlands.

Natural Chess is a next-generation chess experience powered by a deep neural network designed to simulate true human intuition. Unlike traditional chess engines based on cold, brute-force calculations, Natural Chess focuses on intuitive positional understanding inspired by modern artificial intelligence systems such as AlphaZero. It does not calculate like a machine: it feels the geometry of the board like a human player. THE ALPHAZERO SELF-PLAY ODYSSEY Starting from absolute scratch with zero opening books or master databases (Tabula Rasa), the neural network battled over 100,000 games against itself 24/7 on a dedicated cloud cluster. Through reinforcement learning, it independently rediscovered the timeless principles of chess strategy: controlling the center, coordinating pieces, safeguarding the king, and executing brilliant positional sacrifices. 3 EVOLUTIONARY BRAINS READY TO PLAY Choose between 3 distinct milestones of the AI's training directly in your settings: - The Newborn (0 games | 400 Elo): The network at birth. Candid, spontaneous, and curious, fascinating to witness how tactical reflexes emerge from pure chaos. - The Adept (50,000 games | about 1,100 Elo): A vibrant, attacking, and harmonious playstyle. The ideal sparring partner for club players and fans of dynamic chess. - The Champion (100,000 games | about 1,235 Elo): The pinnacle of self-play. Outstanding strategic mastery, resilient defense, and sharp long-term vision without robotic play. (Elos calibrated at 1 second of thinking time, scaling even higher with more calculation time). SMART ELO SLIDER AND DYNAMIC TIME CONTROL Want to play at your exact skill level? Set your target Elo directly using an interactive slider! Natural Chess instantly translates your desired rating into optimal MCTS thinking time (from milliseconds up to 30 seconds for maximum tactical depth). Conversely, adjust the move time and watch the live estimated Elo adapt before your eyes! CHILD AI WITH REALISTIC HUMAN INATTENTION Unlike traditional engines that make artificial blunders, Child AI biologically models human learning and distraction using a Boltzmann probability distribution. With 10 progressive levels, from the curious beginner discovering the pieces to the focused prodigy, it delivers the authentic unpredictability and warmth of playing against a human friend. HIGH-SPEED NATIVE C++ ENGINE Entirely rebuilt in optimized C++ with Monte-Carlo Tree Search (MCTS), decisions are evaluated with split-second fluidity directly on your device's processor. Also includes a classic Analytical AI engine for pure tactical calculation. 100% OFFLINE AND PRIVACY-FOCUSED No Internet connection required. Play anywhere, on an airplane, on a train, or outdoors. Zero ads, zero tracking, and zero cloud dependency. KEY FEATURES: - Deep Residual Neural Network (ResNet) and Monte-Carlo Tree Search (MCTS) - Trained from scratch through 100,000+ self-play games (AlphaZero method) - 3 selectable historical brains (Newborn, Adept, Champion) - Interactive Elo slider with real-time thinking time conversion - Intuitive, human-like playstyle with natural positional feeling - Child AI with 10 progressive levels based on Boltzmann probability - Built-in Analytical AI engine for high-precision calculation - Fully offline gameplay across Mac, iPhone, and iPad - Clean, modern, and distraction-free interface Natural Chess offers a brand new way to experience chess: warm, alive, intuitive, and deeply human.