NES Tetris decision trainer
It sets the board and hands you the piece. No gravity, no timer — take as long as you want, place it where you want, then commit. Afterwards it tells you the right answer, and whether a human at your rolling rate could have made it.
- level
- –
- rolling
- –
- score
- 0
Session
Keys
←→ shift Z/↑ rotate cw · X rotate ccw ↓ nudge down Space/Enter commit placement
N next puzzle R/D replay this board C play on from the result −/= level 1–4 rolling 12/20/30/40 Hz
How it judges
Nothing moves until you commit — this is the decision, not the execution. When you lock in, the trainer compares your placement against every legal one, ranked by board value plus a 2-ply lookahead over the NES randomiser. The right answer is the best placement reachable at your rolling rate: shifts must fit into the drop the NES gravity table would allow. Lock in a placement your hands could not have made, and it is called UNREACHABLE even if it scores best.