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# Tough Sudoku for 4/January/2014

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Submitted by: Gath

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 everybody! We're snowed in today. 04/Jan/14 12:21 AM Awwww! He may be old, but he's someone's baby!(No, I don't mean Joe!) 04/Jan/14 1:58 AM SE=7.2 UP to 291)x-chain:(-9)b6=(9)b2-e2=(9)b8-h8=(9)h4 => c4,g6<>9 UP=342)2-chain logic:(9=5)c3-b2=(9-6)b6=(6)b1=(1)b5 or (5)c3=(6)d3=(1)a3 => b1<>15,a3,de1<>6,a56<>1 UP=363)Ext. S-Wing:(8=1)h5-h9=(8)b9=(69)b12 or (1)h5-b5=(1)b6 => b6<>689 UP=81 04/Jan/14 2:02 AM #0. N-tuples and LC; UP29#1. Swordfish(9) : b6=b2-e2=e8-h8=h4 :=> -9c4g6; UP34#2. Kraken (38 179)cf46 --> UR(38)cf46=9c6=9f3 :=> -9c3; UP81 UR(38)cf46||9c6||1f46-(1=9)f3||7f6-(7=3)d6-3d9=(3-4)f9=(4-9)f7=9f3 04/Jan/14 2:50 AM Or #2. HP(16)b16=1b5-(1=8)h5-8h9=NP(89)b92 :=> -89b16; UP81 04/Jan/14 3:19 AM Poor old Schultz. 04/Jan/14 3:21 AM Smart dog! Any dog, no matter what age, would be under the covers here today.-35 and with wind chill even colder Brrrrr. 04/Jan/14 5:11 AM Happy new year everybody! Standard techniques UP 291. (9)g7=f7-f3=c3-c4=gh4 =>g6<>9 UP 342. (5)h9=(5-4)g9=(4-9)g7=9f7-9f3=9c3-(9=5781)b2579-(1=8)h5 =>h9<>8 UP 81 04/Jan/14 7:08 AM (27) 24@ac8=>ac8<>3&a7<>4(29) 49@fg7=>f7<>1&g7<>5(30) 7@def6=>g6<>7 6@ab6=>g6<>69?@g6=>[f7=9=>f3=1&c4=9=>c3=5=>d3=6]=>a3={}=>g6< >9(35) More... 04/Jan/14 8:50 AM 1. Note fg7=49;ac8=24.Unique possibilities to 29.2. Whether e8=9=g7;OR e2=9=b6;g6=2.UP34.3. Whether h5=8=b9;OR h5=1,b579=578;b2=9.UP81. 04/Jan/14 9:17 PM