A handwritten digit fills the canvas, but you only ever see
through one small window. Everything else is grey. You start on a stroke, so
there's always something in view.
Move the window with the arrow keys or the pad — up, down,
left, right. Each move is one sensing step, and the window travels half its
own width, so views overlap.
You see one window at a time. The rest is memory. That's
the whole point of the benchmark — turn on Keep a trail if you'd
rather play the easier lookback version.
Name the digit once. You get one answer: right
wins the round, wrong ends it. Fewest sensing steps wins; correctness comes
first, so a lucky one-step guess doesn't beat a careful correct one.
36 steps available, which is exactly the number of distinct window positions.
Published models score 6.5–61% here while scoring 92–98% on the same digits
shown whole, so you are the favourite.
Prefer puzzles? Try ARC Race →
Stored only in this browser and sent only to openrouter.ai. Get a key at
openrouter.ai/keys. Every model
listed accepts images, which this game requires. Free models are rate
limited, and a round can take up to 36 calls, so a long round may stall —
switch to a paid model if that happens.
YOUR STEPS0
STEPS LEFT36
AI STEPS—
HUMAN
IDLE
Press START ROUND
Answer once
Window
—
Seen
0%
State
Idle
AI
IDLE
Not playing
Thinking…
Window
—
Seen
0%
State
Idle
Model—
Its thought
—
—
—
Lane
Answer
Result
Sensing steps
HUMAN
—
—
—
AI
—
—
—
A correct answer always beats a wrong one. Between two correct answers, fewer
sensing steps wins; an equal count is a tie. Time is never counted — the model
answers over a network and would lose on latency alone.