Puzzle 66 of 100

One via too many

Goal

Make Y follow A, Z follow B, W follow C, and X follow D. The routing is drawn, but one via joins two signals.

Die: 13 by 11 squares
Layers: Metal, Metal 2, Via
Inputs: C, D, A, B
Outputs: Y, Z, W, X

New in this puzzle

Checking vias

A via joins metal 2 to the metal under it, whatever signals they carry. Where two different signals cross, the square must have no via.

Hint

Find the two outputs that leave their bands, and look where their lines cross. Point at a line to outline its net. Remove the via that joins two different signals.

Solution

This is the game's reference drawing for the puzzle. It meets the goal and passes the design rules. Other drawings can pass as well.

Top View of the solved die for puzzle 66, One via too many, with the Side View below it. — Top View of the solved die, captured from the game. Paths that carry a high level at the moment shown are lit. The Side View below cuts through the row between the dashed lines.

The game window in Isometric View with the solved die for puzzle 66, One via too many, the guide, and the scope. — The whole game window in Isometric View. The scope on the right compares each output with its target band, and the message above it confirms that the drawing passes.

Solution drawing for puzzle 66, One via too many, drawn on a numbered grid with every layer in its game color and pattern. — The solution on the grid. Squares are numbered from the top left corner, so you can count them. The dashed outline marks the squares you draw, change, or erase; the rest is drawn when the puzzle opens.

Legend

Metal37 squares
Metal 219 squares
Via6 squares
Input padC, D, A, B
Output padY, Z, W, X
Squares you draw, change, or erase1 square

About the drawing

The drawing uses 46 of the die's 143 squares.
Part of the drawing is in place when the puzzle opens. To finish it, change 1 drawn square.
At column 10, row 8, erase the via.
6 vias join metal 2 to the metal under it.

Starting drawing for puzzle 66, One via too many, on a numbered grid. — The drawing when the puzzle opens. The dashed outline marks the squares the solution changes.