Sudoku Puzzles

Beautiful blues in the jigsaw!

Now that's pretty! Have a great weekend, everyone!

maen all! i see why they're called tough! found it doable after i printed it out and got down to eliminating possibilities.

Kate!! Very very good

Interesting lighting and perfect flower

7:52 Hi to all. Lovely colours.

9:24

Beautiful reward!

1. Note pair 17 at c18.Unique possibilities to 43.
2. If g2=9,h1=4=d2,e3=9=a1,d8=5,h8=8,a9=7 and row 8 is devoid of 7.So g2=4 and UPs to 81.

13:02, hi everyone.

must have messed up somewhere 31:00

1) Start at 23,basic techniques to UP=43
2) (7):c8=c1-h1=i3,=>i8<>7
3) (8)d4=g4-(8=4)g6-g2=(4-5)d2=(5)d8,=>d8<>8.UP=81

Thank-you Alfred and Sotir for posting solutions/proofs. Just for kicks and giggles, here is a rough comparison of the two posted solutions:
Alfred: 2 steps, 10 total Strong Inference Sets, Max depth in any one step: 8
Sotir: 3 steps, 8 total Strong Infernce Sets, Max depth in any one step: More...

Obviously, I cannot count. Sotir's solution uses a total of 9 SIS, 2+2+5=9.

In both, I do not count SIS considered for an UP. In every case, it takes one SIS for each UP, so that additional count would be the same addition for both solutions.

Thanks Steve for the analysis.I noticed later I could have done without e3=9 in step 2.After g2=9,a1 becomes 9 without the need of 9 at e3.Regards,Alfred.

SE=7.2