NLD4, NLD3, NLD2, NLD1

Puzzle	Incorrect guesses	Unlock time (AEST)	Time to solve	Solve time (AEST)
Decomposition	0	Jul 16, 13:00	7h10m	Jul 16, 20:10
Sudok-IMO: A Unique Performance	0	Jul 16, 13:00	7h11m	Jul 16, 20:11
Tri-Alphametic	0	Jul 16, 13:00	7h12m	Jul 16, 20:12
Circular Reasoning	0	Jul 16, 13:00	7h13m	Jul 16, 20:13
Venn-ary Encoding	0	Jul 16, 13:00	7h15m	Jul 16, 20:15
Koala Kings	0	Jul 16, 13:00	7h15m	Jul 16, 20:15