Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
Received cubes: 64 Required cubes for box= 8
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 09:06:22 up 73 days, 15:16, 0 user, load average: 4.50, 4.64, 4.76