Rechteck mit Löcher

great-puzzle
id = 86
status = timer expired
time = 00:30:00.3
unique solutions = 0
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 01:09:37 up 73 days, 7:19, 0 user, load average: 4.66, 5.02, 4.94