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 | 16:50:26 up 73 days, 23:00, 0 user, load average: 5.27, 4.84, 4.69