... by: SuDokuFan

@BobW to @BluShyGuy
I think he's referring the claim that Andrew makes that "Using the solver will not help you (much)." He's referring to the built in solution count feature in the solver which will return the unique solution to the grid as a way that the solver will help you (by cheating and giving you the answer) rather than using logic or backdoor moves like we do to resolve the grid.

... by: BobW

@BluShyGuy
I'm not sure what you mean. This puzzle has only one solution. Could you elaborate?

... by: BluShyGuy

Ummm, we can still use the solution count to help us XD

... by: hehe

*****************************
The correct answer is:

9 8 1 |7 2 5 |6 4 3
7 5 2 |3 6 4 |1 8 9
4 3 6 |1 9 8 |7 2 5
------ ------ ------
8 4 5 |9 3 6 |2 1 7
2 9 7 |8 4 1 |3 5 6
1 6 3 |2 5 7 |4 9 8
------ ------ ------
5 2 9 |6 1 3 |8 7 4
3 1 8 |4 7 9 |5 6 2
6 7 4 |5 8 2 |9 3 1

*****************************
28
37

... by: Frans Goosens

With trial and error

Combination C2=123 and I4=359

************************************************************
C2=1 I4=3 No solution, Fixed

Combination 2-digits cells

C1=2 Wrong, Undo calculation
C1=3 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=1 I4=5 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=1 I4=9 No solution, Fixed

Combination 2-digits cells

C1=2 Wrong, Undo calculation
C1=3 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=2 I4=3 No solution, Fixed

Combination 2-digits cells

C1=1 Wrong, Undo calculation
C1=3 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=2 I4=5 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=2 I4=9 No solution, Fixed

Combination 2-digits cells

C1=1 No solution, Undo calculation
C1=3 Wrong, Undo calculation
C1=1 No solution, Fixed
A3=3 Wrong, Undo calculation
A3=4 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=3 I4=3 No solution, Fixed

Combination 2-digits cells

A9=4 Wrong, Undo calculation
A9=5 Wrong, Undo calculation

All reset to initial position

************************************************************
C2=3 I4=5 ( G1=5 ) Solved,


#401--------------------------Solution
900 700 600-------------981 725 643
750 000 080-------------752 364 189
006 008 000-------------436 198 725

040 030 000-------------845 936 217
007 800 050-------------297 841 356
000 000 400-------------163 257 498

009 600 070-------------529 613 874
008 470 560-------------318 479 562
000 002 001-------------674 582 931

Total solving time is : 468 sec.
Number of logical steps is : 49038

... by: James Havard

Sorry, forgot to proofread the spelling.

... by: James Havard

136 subs and 130 seconds to get 4 soolving subs. Two of them together gives a singles sooution B3=2 C4=1.

... by: SuDokuFan

Same thing all over again. Exocet gives the elimination of 9's in B56 and 5 from A9, from there solvable