Click cells to assign them to districts. See how boundaries change outcomes.
Paint district:
Grid:10 x 10 = 100 voters
Red voters:0
Blue voters:0
Election Results
Red seats:0
Blue seats:0
Efficiency Gap:0%
Efficiency Gap: Measures wasted votes. Wasted = votes for losers + surplus votes for winners beyond 50%+1. Gap > 7% suggests gerrymandering. Click cells to paint them into different districts, then see how it changes who wins.