A solution by Cat (Time: 7.6s, Blocks used: 26)
The flaw is rather
A solution by Jab (Time: 2.9s, Blocks used: 35)
A solution by Tom (Time: 6.8s, Blocks used: 34)
A solution by Simon (Time: 2.8s, Blocks used: 31)
A solution by Maureen (Time: 2.6s, Blocks used: 40)
A solution by Grandpa (Time: 2.3s, Blocks used: 46)
A solution by Rich vdH (Time: 3.0s, Blocks used: 35)
A solution by cf (Time: 3.9s, Blocks used: +31)
A solution by andycockers (Time: 2.7s, Blocks used: +38)
A solution by Hello (Time: 4.5s, Blocks used: +25)
A solution by Stefan (Time: 4.8s, Blocks used: +27)
A solution by Stefan (Time: 3.7s, Blocks used: +21)
A solution by Stefan (Time: 4.2s, Blocks used: +20)
A solution by Stefan (Time: 2.9s, Blocks used: +16)
A solution by Stefan (Time: 2.9s, Blocks used: +16)
A solution by g4b (Time: 2.9s, Blocks used: +25)
A solution by Phanou (Time: 2.8s, Blocks used: +55)