Daily Currents — September 21, 2026
Today's 4×4 board (UTC). Start on 1, cover every cell, and finish on 5.
About the daily Currents puzzle
The daily Currents puzzle posts a brand-new board every day at midnight UTC — one grid, shared by everyone who plays that day. The week climbs a difficulty ladder: Monday opens on a gentle 4×4 with five gates, the boards grow through 5×5, 5×6, 6×6, 6×7 and 7×7, and Sunday crowns the week with a 7×8 carrying twelve gates. Draw one unbroken current from gate 1 through every cell, pass the numbers in order, and land on the last gate with nothing left uncovered. Finishing today's board keeps your solving streak alive; miss a day and it resets.
Only today's board extends the streak, but nothing here is locked away: replay any past day in the archive, or sharpen your route-finding with the strategy guide — corner logic, the checkerboard parity trick, and pocket-avoidance all make big boards fall faster. When today's current has reached its mouth, the numbered library and unlimited mode are there whenever you want another river to run before tomorrow's puzzle arrives.