Play a game of Raumschach. When the game ends, press Download .rgn on the game-over screen and load the file here with “Load .rgn file”. Or copy the move list directly and paste it below. Press “Analyze →” to begin. The boards will update to the final position, and you can step through every move from the beginning.

Use the “← →” arrow keys to step backward and forward one move at a time, or click any move directly in the move list on the left. The “⇤ ⇥” buttons jump to the start or end. All five boards update simultaneously on every step so you can follow the position across all levels.

As soon as you press “Analyze →”, Raumfischer begins evaluating each move in sequence. A thin progress bar sweeps across the top while it works. Use the “Engine strength” slider on the input screen to control how deeply it searches: “Weak” (2 plies, near-instant) through “>GRSM” (6 plies, very thorough but slow). “Average” is the recommended starting point for most games.

For each move, the engine finds the best available move and compares it to the move actually played. The difference is the “evaluation loss”. Flags appear automatically in the move list: Hover any flag to see the exact eval loss. Flags from the engine and authored annotation symbols (! !! !?) in the move list come from the theory volumes and reflect strategic and geometric judgment independently of the engine.

The “◈ Engine” button in the top-right of the analysis screen toggles a suggestion line under each move. When visible, it shows the move Raumfischer would have played. If the played move was the engine’s top choice, the suggestion appears in green with a ✓. Toggling this off keeps the view clean for pure game study.