Reversi under the Cosmos — an observatory board game with two searching AIs

Reversi under the Cosmosan observatory at night · full 54k-object sky · two searching AIs · WebGL2 —

Black (AI)2

White (AI)2

Who plays

AI strength

Move tempo

Candlelight (real, with shadows) Brass candelabra — bright, warm Desk lamp — soft, warm Candle — dim, flickering

+ real Moon & Sun (from star charts, driving the sky)

Polished-floor reflections

Simulation (last move)

Move #0

Disc bodies4

Flipping now0

Positions searched0

Eval (Black view)0.0

Move log

No moves yet.

Analyze & coach the AI

Every legal move, ranked by alpha-beta. ★ = its pick, number = discs it would flip. Click any bar to force that move — the astronomer physically places it, the flip cascade runs, then the AI carries on.

🔭

Black wins

34 – 30

a decided game — 64 squares filled

New game.

drag to orbit · scroll to zoom · click a highlighted square — the astronomer places a disc and the flip cascade runs