Killer-X

Para · Post by **Para** » Thu Mar 22, 2007 12:10 am

Ok this is not pretty but well no one else seems to find anything either.

30. R4C4: no 7
30a. R4C4 = 7 -->> R8C4 = 9 -->> R6C45 = {24} -->> R8C8 = 2 -->> R6C6 = 1 -->> R3C6 = 4 -->> R27C6 = {26} --> R1C6 = 9 -->> R5C6 = 8 -->> R5C7 = 9
30b. R4C4 = 7 -->> R7C7 = 9
30c. R4C4 = 7 leads to 2 9's in C7, so R4C4 can't be 7.

31. 7 in N5 locked for D/

Para

Para · Post by **Para** » Thu Mar 22, 2007 12:32 am

31. R2C2 and R4C6: no 3
ALS A: {R1235679C6}
ALS B: {R8C2 + R9C23}
x = 7; z = 3

32. R6C6 = 3 (hidden single)

33. 3 locked in C3 for N4

34. 1 locked in R6 for N6

35. R4C8: no 2. See all 2's on D\

Para · Post by **Para** » Thu Mar 22, 2007 12:41 am

36. Hidden Pair {12} in R4C4 + R8C8

37. R8C2: no 9; sees all 9's on C4.

38. R8C2 = 3

39. R1C5 = 3 (hidden); R2C5 = 7

40. R8C1 and R7C7 both {79}. See all 9's in N1. So they can't both be 9. R1C1: no 7.

41. 7 locked in R1 for N3.

42. Naked Pair {49} in R1C1 + R1C9: locked for R1 + R9C9: no 4.

And now the rest is all hidden and naked singles.

Para