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# Tough Sudoku for 23/April/2013

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Submitted by: Gath

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 Cute! When I play with my grandkids at the park my hair does that too! (Yes, I go down the slide with them!) 23/Apr/13 12:06 AM SER=8.4 UP=261)ALS-XZ:(9=2)b7-(9=452)b3c23 => b12,c7<>2 UP=272)ALS Logic:(5)a8=(234)a45b6 or(5)c8=(8)c5 => c5<>24 UP=293)2-chain logic:(3=1)i6-i9=(3)f9 or(1=3)i6=(9)h6=(2)d6-d9=(2)f9 => f9=23 Hidden bivalue cell rule UP=314)Continuous loop:(2)f45-d6=(2-3)b6=(3)i6-i9=(3=2)f9 => b6<>4 UP=355)5 2-string kite:h34-ci5 => c3<>5 UP=81 23/Apr/13 2:03 AM SSTS to UP=261)(2=459)c23b3-(9=2)b7,=>b12c7<>22)(8)c5=(8-5)b4=b123-(54=2)c32,=>c5<>2 3)(4=5)c3-b123=b4-h4=(5)h3,=>c3<>54)(4)b9=(4-2)b6=d6-d9=(2-3)f9=i9-i6=(3)b6,=>b6<&G T;4.UP=81 23/Apr/13 2:47 AM For step 3-4 also:SSTS to UP=261)(2=459)c23b3-(9=2)b7,=>b12c7<>22)(8)c5=(8-5)b4=b123-(54=2)c32,=>c5<>2 3)FXW(5): b123=b4-h4=h3,=>c3<>54)(2)b6=d6-d9=(2-3)f9=i9-i6=(3)b6,=>b6f9=23.UP=81 23/Apr/13 3:15 AM She is just beautiful! 23/Apr/13 4:23 AM 27 69@ai5=>bh5<>9 a8=9=>[i5=9&a6=8=>a2=3]=>i2={}=>a8<>928 35@eh8=>e8<>79 f7=5=>{e8=3,f6=3&g4=5=>[d3=5&d4=6=>d9=4]}=>d7={}=>f7<>529 2@gh7=>g9<>2 1@g123=>h2<>1 More... 23/Apr/13 9:48 AM Hello Hayley! You do look beautiful, darling.Hope you're enjoying the school holidays. 23/Apr/13 10:41 AM Hi Les,can you check your notation please. 69 at ai5 is not valid, and f7 already =8, for instance, in this grid. Best Regards, Alfred. 23/Apr/13 8:20 PM Thanks Alfred I posted my solution for another day.Try this one.27 8@de1=>i1<>8 3@c78=>ab9<>3 f9=7=>i9=3=>{c7=3=>,i3=8=>i6=1=>f4=1=>f5=2&b6=3=>a1=3=>b1=2=>c5=2}=>f9 <>729 3@c78=>b7<>330 More... 25/Apr/13 10:56 AM