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Submitted by: Gath

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 #1. 5 Singles; UP27; NT(348)def5, LC(2,7), NP(18)hi7#2. Chain[4] : 345a7.b89=1b9-(1=35)b38 :=> a2=5; UP31; LC(9), HP(79)ac3, LC(1)#3. Chain[3] : (1=9)h2-(9=7)h9-(7=1)c9 :=> -1c2; UP43; NP(38)ch4, HP(57)ei6#4. Chain[3] : (4=2)d9-2d6=2b6-(2=4)b4 :=> -4b9; UP81 20/Apr/13 2:44 AM |  |
 1. Note hi7=18.Unique possibilities to 27.2. If b938=135,gh1=57,ac3=79,c2=1=i3,i7=8;the 38 rectangle at ch46 is unresolvable.So c9=1.UP43.3. Whether d6=1=a4,a7=4;OR d6=2,d9=4;b9=5.UP81. 20/Apr/13 3:06 AM |  |
 Standard techniques UP 271. (5=3)b8-(3=1)b3-b9=(1-7)c9=(7)a8 =>a8<>5 UP 312. XY-wing (1=7)c9-(7=9)h9-(9=1)h2 =>c2<>1 UP 433. (2=4)d9-4b9=(4-2)b4=(2)ef4 =>d6<>2 UP 81 20/Apr/13 6:56 AM |  |
 Ahh, Paris! 20/Apr/13 8:06 AM |  |
 28 18@hi7=>a7<>1 a8=5=>[b8=3&c9=7=>b9=1]=>b3={}=>a8<>532 79@ac3=>ac3<>1 b9=1=>[c2=1&c9=7=>h9=9]=>h2={}=>b9<>144 348@def5=>d6<>38 More... 20/Apr/13 8:43 AM |  |
 Lovely! 20/Apr/13 3:35 PM |  |

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