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 | 17:09:29 up 74 days, 23:19, 3 users, load average: 4.61, 4.83, 4.89