ExtraplotGuess the graph. Draw the rest.

This is a draw-the-graph game, not a four-button quiz and not a Desmos homework sheet. Press the shaded side and drag to the last year. The stroke always starts from the last known point. Cover every hidden year. Each chart is worth up to 1000 points.

Score is mean absolute miss divided by the height of the Y axis. Stay inside 1% of that height for 1000. The score falls to zero at about 31% of the axis. Five charts make 5000.

A guess-the-graph game with a cut-off year: that is Extraplot. You see a real yearly series, the recent stretch is covered, and you draw where the line went next. There is no account. The board sits on this page at extraplotgame.online.

An extraplot game, or extrapolate game, is a trend you finish by hand: not a capital city and not four tiles. The loop stays tight: read the known line, drag the shaded side, and see how far you missed.

It is closer to a line-chart puzzle than to GeoGuessr, Perceptle, or Magnitudle. Those daily games ask where, how big, or which photo. Here every hidden year has a published number. Easy charts mostly keep going. Hard charts bend, crash, or stall.

Midnight Eastern starts a new daily game. Practice stays open so you do not wait on the clock. Scores stay in this browser. There is no login wall and no app-store download. This is a browser data puzzle, not a trading terminal.

Look at the known years before you touch anything. Then grab the shaded side and drag to the last labelled year. Draw over a stretch to redo it. The stroke always begins at the last visible point.

No mouse? Focus the chart and use the arrow keys: left and right pick a year, up and down set the value. You still have to reach the last year before you can reveal.

When the real line inks in, the gap is the score. If the reveal button complains, you stopped short of the last year. Restart line wipes only this chart.

People looking for an Extraplot daily game get the Eastern calendar date. The same date always deals the same five charts and the same cut-off years. Finish the set and this browser stores the score. A refresh should show the finished board, not a blank chart.

People looking for Extraplot unlimited get Practice: a shuffled extra set from the same catalog, with no effect on the stored day. Daily still rolls at midnight Eastern. This site is independent; it is not GuessDash Extraplot and it does not load that board.

Mean absolute error on the hidden years, divided by the height of the Y axis, is the whole formula. Stay inside 1% of that height and the chart is 1000. The score then falls linearly and hits zero near 31% of the axis. Units on the label do not change it.

Five charts make a 5000-point board. Missing a crash on air travel can wipe a hard chart even if the easy literacy line was perfect. Practice does not overwrite a stored daily.

Ask what could stop the slope: a pandemic, a fertility collapse, a market that is already saturated. A ruler from the last three known years is a first draft, not a law.

Watch the Y axis. A line that looks dramatic on a cropped chart may be a small miss on a 0-to-max scale, or the opposite. Reveal once you have reached the last year. Curiosity is cheaper than a second wild stroke after you already had the shape.