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Submitted by: Gath

 Indicate which comments you would like to be able to see GeneralJokesOtherSudoku Technique/QuestionRecipes
 No Comment? How about, 'Nice catch!' 30/Jun/12 12:35 AM |  |
 1. Note g12=49.Unique possibilities to 42.2. b12=1,to avoid the unrsolvable 49 rectangle at bg12.UP49.3. Whether b6=3;OR e6=3=d9;a7=3.UP53.4. Whether b6=9=a5;OR e6=9=c8;c1=8.UP81. 30/Jun/12 12:53 AM |  |
 Should read:4. Whether b6=9=a2; ... 30/Jun/12 12:56 AM |  |
 10,50 30/Jun/12 3:24 AM |  |
 A proof: 1) Basic techniques to UP422A) (9)c89=(9-8)c1=(8)a2-(8)a4=(349)a457-(9)d5=d9 => b9<>92B) (8)a4=(349)a456-(49=236)b456-(236=1)b9-b12=(1)a2 => a2<>8, UP50.3) A coloring of 3s: b9=b4-a5=d5 => d9<>3, UP81. Most likely steps 2A+B can be More... 30/Jun/12 7:15 AM |  |
 Hi Jyrki. The simplest way I would represent steps 2A+B : Chain[9] : (8=349)a457-9d5=9d9-(49=1236)b4569-1b12=1a2 :=> -8a2 without extra symbols to represent 'memory'. On the other hand, a complete understanding of the chain can only be obtained by writing down the More... 30/Jun/12 6:59 PM |  |
 Complement to the note : ... and deleting the empty spaces. 30/Jun/12 7:03 PM |  |
 29:53 30/Jun/12 11:56 PM |  |

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