6. X-Wing & Swordfish X-Wing (orange) on 4 at HJ89 removes 4 in G89Swordfish (blue) on 5 at GHJ189 removes 5 in GHJ2456Optional:Jellyfish on 5 at BCDF3457 removes 5 in D2
7. Variation: Analysing row G Ifyoudon‘tlike X-Wings etc. Looking at row G: if we assume G12=56 G89=234 G456=12478 which is impossible. Therefore G1=67, G2=68 G1=7, F1=6, H1=8, J1=5, etc.Thanks to Pat for pointing out this variation.
8. G8=5h, G9=6h, G1=7s, G2=8s Continuing with my X-Wing & Swordfish solution…G456 cannot be 678 because G2 would be empty G456=1234 G8=5h
18. Weekly Extreme Str8ts Puzzle #34www.str8ts.com Solution by SlowThinker(with a variation by Pat) Note: there are other (maybe easier) ways to solve this puzzle.