Combat Game Modes

The royal game in its purest form. Standard FIDE piece movements, check, checkmate, castling, en passant, and pawn promotion.

Key Features

• Adjustable Engine Bots: Train against computer opponents calibrated across a wide Elo rating scale (250 to 2000+).
• Custom Timers: Play Blitz (3 min, 5 min), Rapid (10 min, 15 min), or untimed study games.
• Rotated Board for Black: Automatic 180° perspective rotation when playing Black pieces, with full manual flip support.
• Move History & Analysis: Replay moves, inspect captured material advantages, and practice checkmate patterns.

Created by Bobby Fischer to eliminate memorized opening books and test pure tactical chess intuition from move one.

Rules & Mechanics

• Starting Position: The pieces on the 1st and 8th ranks are randomized into one of 960 possible starting configurations.
• Mirrored Ranks: White and Black mirror each other identically across ranks.
• Bishop Placement: The two bishops must always start on opposite-colored squares.
• Castling Constraints: The king always starts between the two rooks, allowing standard a-side and h-side castling.

Chess under total stealth. Players have limited field-of-vision and can only see squares their pieces can observe.

Rules & Mechanics

• Vision Radius: A square is visible only if your piece occupies it or can legally move or attack to it on the current turn.
• Pawn Sight: Pawns see the square directly in front of them as well as their diagonal attack squares.
• No Check Warnings: There is no concept of "check" or "checkmate"—you do not have to announce threats.
• King Capture Win Condition: The game ends immediately when a player captures the opponent's king.

A high-velocity variant where every capture unleashes an explosion that vaporizes surrounding units.

Rules & Mechanics

• Detonation Radius: Every capture triggers an explosion in the 3×3 area surrounding the capture square.
• Casualties: The capturing piece and the captured piece are both destroyed, along with all adjacent non-pawn pieces.
• Pawn Resilience: Pawns are only removed if directly captured; they survive adjacent explosions.
• King Immunity & Restraints: Kings cannot capture any piece (since that would trigger a self-destructive explosion) and cannot make a move that causes an adjacent explosion to their own square.

Chaturanga's signature fusion: combining rapid mental arithmetic with tactical chess strategy and earned board spells.

Battle Formats

• Math Before Move: Solve an arithmetic equation under time pressure before confirming your tactical chess move.
• Speed Duel & Gate Showdown: A 90-second mental math trial where quick answers unlock seven collectible spells.
• Earned Board Spells: Cast tactical powers onto the board—freeze enemy units, shield friendly pieces, jump over defenders, or swap piece positions.

Choose your combat mode

All five modes are playable instantly in your browser with zero downloads.