Car Sort Level 123 Solution Walkthrough

Two Chambers Joined By A Left U-Turn

Level 123 has four top towers, three numbered center columns, and three lower columns. A U-shaped road connects the center to the bottom.

Use this route:

red top-left -> purple top-middle -> pale top-right -> green top cleanup -> purple center-left -> numbered center bays -> pink center-right -> cyan lower-left -> red lower-middle -> red/green lower-right

Clear the top before opening the numbered center. Finish each revealed number before using the U-turn for the lower columns.

If a car stops in the U-turn, complete its center batch rather than opening below. If red stalls at the bottom, cyan remains active. Level 123 is ready for the final columns when the three center bays are empty.

Keeping The Left U-Turn Empty

Red, purple, pale, and green should clear the roof before the numbered center begins. Their cars use the upper road and leave the U-turn available for the later phases.

Purple opens the center-left. Resolve each numbered bay according to the color it shows, finishing one release before touching the next. Pink on the center-right closes this chamber. At that checkpoint all three center positions should be quiet.

Cyan starts below from the left. Red follows through the middle, and the red/green right column finishes after the U-turn clears.

If a car stops inside the U, work backward to its center batch and park that color. Opening a lower column adds traffic behind the blockage. A stalled red car below usually waits on cyan; finish cyan and let the bend empty before continuing the final two columns.

Three Uses Of The U-Turn

The left U-turn is mostly quiet during the roof phase, becomes the exit for the numbered center, and finally carries the lower columns. Keep those uses separate. After the top red, purple, pale, and green groups, the upper entrance should be empty. After purple, the numbered releases, and pink, the entire bend should be empty again.

Cyan is the first lower color allowed through. Let it park before red enters from the middle. The rightmost red/green column is last because it requires the full return path around the U. If a car stops on the upper half of the bend, a center batch remains active; if it stops on the lower half, finish cyan or red. Using position rather than guessing the covered color gives Level 123 a reliable recovery route.

Before the final mixed-looking right column, make sure the center counters no longer move and the lower cyan column is completely quiet. Red should clear the inside of the U first; green then receives the outer bend without meeting it.

If the last cover reveals another color first, finish that visible batch against an empty U-turn. Resume red/green only after the lower road returns to the same clean checkpoint.