BLOS Play — Chess MindWorks™
Think Ahead.
Move Smarter.

Three ways to play the same premium engine — legal move validation, minimax AI, castling, en passant, and promotion always enforced.

♟
Solo vs AI
Single Player

Play against the Balthrop Logic engine. Novice to Master difficulty, four engine styles, undo, hints, FEN export, captured piece tracking.

Local · Instant Start
⚔️
Live Duel
Multiplayer · Real-Time

Create a room, share the 6-character code. Human vs Human, Human vs AI, or any combo. Bullet to Classical time controls.

API · Room-Based · 2 Players
🏆
Tournament
Bracket Competition

Organise or join Swiss, Knockout, or Round Robin brackets. Up to 16 players, automatic room assignment, live standings board.

API · Bracket · Up to 16
Live Duel
Create a room or join with a code
⚔️ Create a Room
Configure your game. Share the room code with your opponent.
Configure your duel above.
🔗 Join a Room
Enter the 6-character room code shared by the host.
Enter a room code to join.
Time Controls
⚡ Bullet 1+0 / 2+1 — ultra fast pressure
🔥 Blitz 3+2 / 5+0 — tournament standard
⏱ Rapid 10+0 / 15+10 — strategic play
♟ Classical 30+0 — deep calculation
Tournament Mode
Organise or join a bracket competition
🏆 Organise Tournament
Create, share the code, then start when players register.
Configure your tournament above.
🎯 Join Tournament
Enter the tournament code from the organizer to register.
Enter the tournament code above.
♞
Waiting for Opponent
Share your room code. Game starts when all seats are filled.
Room Code
——————
play.balthroplogic.com/chess/
Players in Room
Polling for players…
Tournament
🎯 Code: — ⏱ — 🎪 — Round —/—
Registration
Rounds & Pairings
Rounds appear once the tournament starts.
Standings
#PlayerPtsWDL
Your token (to join room):
—
Club · Balanced FEN: — Solo
♚
Algorithm
Black engine
—
♔
You
White human
—
Pawn Promotion
Choose a piece for your pawn
👁 Live Spectator Room: — —
● live
♚
—
Black
—
♔
—
White
—