Rechteck mit Löcher

22.Problem
id = 141
status = stop: max solutions reached
time = 00:00:00.1
unique solutions = 1
using part
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 10:46:18 up 65 days, 16:56, 0 user, load average: 5.98, 5.41, 5.29