SudokuSolver Forum

1. In n3 [r1c8,r2c7] between them must have at least one of (1379).
-> [r1c7,r2c8] cannot be {28}. Must contain at least one of (46).
-> Only place for 5 in n3 is r1c9.

Whichever even number is in r2c8 - its consecutive odd numbers must be in r1c9 and r3c7.
Since r1c9 = 5 -> [r2c8,r3c7] = [43] or [67]

Also 3 in c9 must be in r46c9.
-> r5c9 from (68)
-> 7 in c9 in r89c9.

2. Whatever even number is in r7c9 must go in r8c5 in n8.
The two odd numbers consecutive to that must be in r9c46 in n8.
-> Those same two numbers must be in r7c7 and r8c8 in n9.
-> Those same two numbers must be in r14c9 in c9.
But r1c9 is a 5 and r4c9 cannot be a 7 - must be a 3.

-> r9c46 = {35}
-> r8c5 = r7c9 = 4, r7c7 = 3, r8c8 = 5
-> r9c7 = 6, r9c8 = 2, r8c7 = 8

Also r3c7 = 7, r2c8 = 6
-> r5c79 = [26]

Also r4c8 = 7
-> r56c8 = [48]
-> r4c7 = 9, r6c79 = [51]
-> r7c8 = 1, r89c9 = {79}

Also r12c7 = [41]
-> r13c8 = [93]
-> r23c9 = [28]

Easier after this....