White to move
White 0:00Black 0:00
Watch bots
The computer plays both sides and the guide explains each move.
Developing your pieces on a Sphere
Seven guided lessons from 240 bot games, each with practice positions checked by the engine.
Drills
Rounds of 5 engine-checked positions. Your best streak is saved on this device.
Short lessons with live positions. You can move pieces in each one.
Why it helps in classical and blitz
Practice habits from the globe that can carry over to a flat board.
Openings built around the wrapped edge. Step through each move with notes.
Computer levels with estimated ratings (from a bot round robin, an estimate only):
Local Elo: start 1200, K = 32, provisional (?) for the first 10 games. Undo, Hint or a level change makes the game casual. Stored on this device only.