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# Tough Sudoku for 7/September/2014

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Submitted by: Gath

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 everybody! 07/Sep/14 1:04 AM Beautiful butterfly, Sue! 07/Sep/14 1:50 AM Gorgeous butterfly , Sue! I looked it up and I think it's a 'Painted Lady' 07/Sep/14 3:06 AM g8=7 -> contradiction via Basics; UP32c5=1 -> contradiction; UP41[(19=5)hb5-(5=9)b6-9b9=9d9]-(9=2)d5; UP81 07/Sep/14 3:13 AM I see you still know how to write a chain (as long as the position is really simple)...must be genius at work eh??? g8=7 is about a depth 40 net, site puzzle is in fact a difficult SE=8.5 (still unsolved) 07/Sep/14 5:06 AM the Y series begins (Y not make a path - that, after all, is the challenge)-- this one is difficult, but not the slog required for the site puzzle. Y-1: Symmetry=None, Start=25, SSTS=27, SG=15.75, SE =8.9081900000300080700050100802009002001000005076000000030025400000000030000100009607 07/Sep/14 6:05 AM Lovely! Butterflies so often don't stay in one place. 07/Sep/14 8:37 AM #1. UP23; [XW(7bf89)==35g8]-7g8; UP32; HP(35-68)gi8=6g456-6h45; [9d1=9f1]-6de2 g8=7 implies :i8=3, i7=5, h7=4=g1, g3=2, g456=2=d7, d8=1, cdh5=169, b23=1;Either a12=27 or a1=8, f3=8=d9, i9=2=ab3, a2=7 :=> b12=7;7bf89 has no solution #2. More... 08/Sep/14 8:12 AM