♟️ Classical Moves. Hidden Identities. Pure Deduction.

Q-GAMBIT combines classical chess movement with the tension of imperfect-information strategy. Every piece occupies a single square on the 8×8 board, but starts with unresolved candidate identities (King, Queen, Rook, Bishop, Knight, or Pawn). A strong move is not only about the square you claim—it also shapes what your opponent can deduce and what you keep concealed.
Note: “Quantum” describes the game mechanic of unresolved candidate identities—not a physical quantum simulator.

⚡ How Deduction Works in 15 Seconds

  • Move by Candidate Rules: A piece can make any move legal for at least one of its remaining candidate identities.
  • Movement Narrows Identities: Suppose a piece has only Bishop, Rook, and Queen as candidates. Moving it diagonally along a clear path immediately rules out Rook. A subsequent straight move rules out Bishop, revealing it as the Queen.
  • Board-Wide Conservation: Each side commands the standard 16-piece army (1 King, 1 Queen, 2 Rooks, 2 Bishops, 2 Knights, 8 Pawns). Confirming one piece’s identity ripples across the entire team and can lock in other pieces automatically.

🏆 Game Modes for Every Tactician

  • 👑 100-Tile Challenge (Solo Campaign): Sign in and conquer a 100-stage tactical gauntlet! Stages cycle through 10 min, 3 min, and 30s / move time controls while the CPU grows stronger every 3 stages. Earn stars for winning without hints and with over half your clock remaining.
  • 🤖 Interactive Tutorial & CPU Practice: Learn the ropes in minutes, choose White or Black, adjust CPU strength, and use Move Hints (highlighting both the recommended piece and destination square).
  • 🌐 Online Matchmaking & Friend Rooms: Test your bluffing and deduction against live players in Ranked Matches, jump into Quick Casual Play, or host/join private 1v1 lobbies with a shareable room code.
  • 🧩 Weekly Chess Problems & Match Replays: Sharpen your tactical vision with weekly checkmate puzzles and review your latest 10 matches move-by-move in the Replay Theater.
  • 🎨 100% Fair, Cosmetic-Only Rewards: Unlock custom boards (Walnut, Stone, Metal, Crystal, Obsidian, Gold), piece sets, victory effects, avatar frames, and in-match battle BGM. Cosmetics never alter movement rules or playing strength.

🌍 Instant Browser Play in 12 Languages

Play immediately on desktop or mobile with 1-Click Guest Mode, or sign in with Google to save your 100-Tile Challenge progress, collection, and ratings. Fully localized in English, 日本語, 简体中文, Русский, Français, Deutsch, Español, Türkçe, Polski, हिन्दी, Português, and தமிழ்.
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