Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 04:47:22 up 76 days, 10:57, 0 user, load average: 4.88, 4.98, 5.03