Rechteck mit Löcher

70.Problem
id = 165
status = timer expired
time = 00:30:00.2
unique solutions = 0
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 14:35:06 up 73 days, 20:45, 0 user, load average: 4.87, 4.96, 4.86