Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 12:22:00 up 75 days, 18:32, 0 user, load average: 4.87, 4.96, 4.94