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# Tough Sudoku for 12/February/2019

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Submitted by: Gath

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 11:45. 12/Feb/19 12:45 AM Basics to 291. (472)b135 = (2)b4 - (26=4)ig6.i4 - g7 = a7 - (4=7)a8 - (73=4)e58 - b5 = (47)b13 => -8b3; basics to 332. (5)d8=(5-2)g8=g5-(2=6)a5-b4=i4-(64=1)g67-a7=(1-7)a9=(7)d9*-(7=3)e8-(34=5)be5-c5=(5)c7 -5d7, -5d9*; basics to 81 12/Feb/19 4:24 AM Missing symbol '=>' in step 22. (5)d8=(5-2)g8=g5-(2=6)a5-b4=i4-(64=1)g67-a7=(1-7)a9=(7)d9*-(7=3)e8-(34=5)be5-c5=(5)c7 => -5d7, -5d9*; basics to 81 12/Feb/19 4:26 AM Unusual photo! 12/Feb/19 6:15 AM Which Fiona? Sudoku Fiona visiting in an English-speaking country? 12/Feb/19 6:45 AM Wow, that's a great photo! 12/Feb/19 1:45 PM Basics to 29 1. X-chain x=6 => b1<>6 XY-chain 3469 =>[a5,b2,b3]<>9 => a2=9 f3=9 Basics to 31 2. W-wing 26 [a1,i4]=> i1<>6 UR 35 fi12 => [i1,i3]<>3 3.if i1=4 => i2=5 h1=6 g9=6 g6==4 h6=8 h8=4 a8=7 e8=3 e5=4 g7=1 i9=8 h9=3 b9=5 => b5=0 =>i1=5 solve 12/Feb/19 10:05 PM