Rechteck mit Löcher

great-puzzle
id = 86
status = timer expired
time = 00:30:00.3
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 03:11:59 up 76 days, 9:22, 0 user, load average: 4.86, 4.93, 4.89