Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 06:39:04 up 74 days, 12:49, 0 user, load average: 4.44, 4.83, 4.80