Puzzle #10
Delta
8 × 8Intermediate7 colorsPublished October 8, 2026
Brown's dots start far apart, one on the left edge and one near the bottom right, and its path crosses row 6, climbs column 4 and wraps the top-left corner to join them. The right side falls quickly to squeezes along the top edge. A single choice for Orange then sets up a second squeeze that sends Green around the bottom-left corner.
New to these puzzles? Read how to play first. Connect each pair of dots with a path, fill every cell, and don't let paths cross. This board has exactly one solution.
Hints
Hint 1: where to look
Start along the top edge, at the top-right corner and the cell at row 1, column 6.
Hint 2: the first idea
Both of those cells have only two usable neighbors. Orange passes through the corner and down the right edge, and Blue passes through row 1, column 6 and heads down toward its lower dot.
Hint 3: the key step
When Orange reaches row 6 on the right edge, turning left would cut Brown off. Send Orange around the bottom-right corner to its lower dot, and Brown is forced along row 6.
Techniques used: Forced moves, Edges and corners, Bottlenecks.
Step-by-step walkthrough
Every step below follows from the rules alone, with no guessing. Try the puzzle first and use the walkthrough when you get stuck.
Step 1 of 5
Two squeezes along the top edge start the board. The top-right corner has only two usable neighbors, so Orange passes through it and heads down the right edge. The cell at row 1, column 6 also has only two usable neighbors, so Blue passes through it and turns down column 6. Red's right dot is now hemmed in with one open side, and Red and Orange push each other down columns 7 and 8 until Orange reaches row 6.
Step 2 of 5
Blue's path now sits right above its lower dot at row 4, column 6. Turning left at row 3 would box Green in with nowhere to go, so Blue joins straight down.
Step 3 of 5
Orange's path at row 6 could turn left into the open middle. That would cut Brown off from its partner, so Orange continues into the bottom-right corner and runs along the bottom row to its lower dot. Brown's right dot now climbs one cell and heads left along row 6, with Red sliding left in row 5 above it and Pink sliding left in row 7 below it. Brown keeps pace to column 4, and Pink's two ends meet in column 4.
Step 4 of 5
The cell at row 8, column 3 has only two usable neighbors, Green's lower dot and the open cell to its left, so Green must pass through it. Green wraps around the bottom-left corner and climbs the left edge, while Purple's lower dot, boxed in beside it, steps up. The two climb side by side, with Green turning into column 2 and Purple turning up column 3. Brown moves at both ends, its left dot stepping up the edge and its middle path climbing column 4 to row 4.
Step 5 of 5
The finish is all forced moves. Red climbs column 5 toward its upper dot, Purple steps up to its partner at row 3, column 3, and Green climbs column 2 to row 2. Brown runs up the left edge, across the top row and down column 4 to join its middle path. Green and Red each end beside their own dots and connect.