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# Tough Sudoku for 10/February/2014

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Submitted by: Gath

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 everybody! 10/Feb/14 1:31 AM SE=7.2 UP to 421)Forcing:(6)h4=(7)g5=(8)a5 or(6)h9=(5)c9=(7)a9=(8)a5 => a5=8 UP=452)(-5)h4=(5)b4=(7)c4=(2)c8=(5)c9 => h9<>5 UP=81 10/Feb/14 2:46 AM #1. UP46; (8=3)i8-(3=2)a8-2a6=2d6-2d4=*[(8=*5)d4-5d5=(5-7)g5=(7-6)h4=6i4] :=> [8i8==8d4==6i4]-8i4; UP81 10/Feb/14 2:52 AM (28) 2@d46=>d3<>2(33) 379@abc1=>f1<>379(47) 8?@g2=>[d2=9&i8=8=>i9=3]=>d9={}=>g2<>8(48) 5?@g5=>[h6=3&h4=7]=>h3={}=>g5<>5(49) 2?@a6=>[a8=3&d6=8=>g8=8]=>i8={}=>a6<>2VHBC to More... 10/Feb/14 7:07 AM 1. Note gi1=56.Unique possibilities to 46.2. Whether i4=6;OR i4=8,i8=3,a8=2=c4;gh6=35,b4=5,h4=7;h9=6.UP81. 10/Feb/14 9:00 AM Standard techniques UP 461. Kraken cell (289)a6 =>SIS 5g8=6h9 =>h9<>5 UP 81||(2)a6-a8=(2-5)c8=(5)g8||(8)a6-(8=7)a5-g5=(7-6)h4=(6)h9||(9)a6-(9=5)b6-(5=38)gh6-(8=6)i4-h4 =(6)h9 10/Feb/14 10:46 AM 6.54 15/Feb/14 4:57 PM