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 | 22:33:28 up 73 days, 4:43, 0 user, load average: 4.43, 4.62, 4.63