How 4 arrows crack a tiny 4×4 sudoku

Added: 2026-05-27

[00:00:00]Okay, this is a good one. Today, it's an arrow puzzle. 4 by 4 and check out those circles. Every circle is a sum. It equals all the digits its arrow runs through. Long arrow, big number. Short arrow, small number. That's the whole game. Start with the circle on the left edge. Its arrow stretches right across the grid and the only total that fits is four. Lock it in.

[00:00:19]Now the circle up top. Its arrow points left across two cells. Two different digits. The smallest they can sum to is three. That trims the candidates instantly.

[00:00:30]Bottom left corner. The arrow forces a two, then a one. And the rest of that row almost writes itself.

[00:00:37]Here's where it slows down. The middle is a tangle of twos and threes. Every circle is fighting for the same digits.

[00:00:44]So look hard at column three. It needs a four somewhere, but the arrows keep eating the options. There is only one cell left that can actually hold it.

[00:00:54]And there it is. The four drops into the top circle. That is the key that cracks the whole puzzle open.

[00:01:00]Now it cascades. Every circle resolves.

[00:01:03]The sums start confirming each other, top to bottom.

[00:01:06]Last few cells. The ones and twos slot into the corners. Rows check, columns check.

[00:01:11]1 minute 10 seconds. Clean.