Logic Masters Deutschland e.V.

With the release of sirxemic's sudoku maker, I've been able to recreate this puzzle in a style much truer to the actual Metro map. Links to both versions are available below.

Normal sudoku rules apply.

Thermometers: Along the red line, digits strictly increase from Gallery Place/Chinatown (i.e. the red bulb).

Region Sum Lines: Along the blue line and along the orange line the sum of digits must be the same in each box the line passes through.

German Whispers: Along the green line, adjacent digits must differ by at least 5.

Variant Whispers: Along the yellow line, successive differences must alternate in sign and digits may not be consecutive.

Difference pairs: White dots on no line represent nonexistent stations in Georgetown. Digits separated by one of these dots must be consecutive.

Play the updated version: CTC

Or play the original version: f-puzzles CTC