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Sunday 16-Feb-2020

... by: Frans Goosens

Thanks to James Havard
G4=9


With trial and error

Combination A9=138 and F3=147

************************************************************
A9=1 F3=1 No solution, Fixed

Combination 2-digits cells

C3=8 ( F1=2 ) Solved,


#387--------------------------Solution
002 000 000-------------972 346 851
400 510 000-------------436 518 972
050 700 064-------------158 792 364

500 000 000-------------549 871 623
003 000 400-------------763 259 418
080 600 095-------------281 634 795

800 900 000-------------817 923 546
090 005 007-------------694 185 237
005 067 089-------------325 467 189

Total solving time is : 14 sec.
Number of logical steps is : 299

Saturday 15-Feb-2020

... by: James Havard

@Frans Goosens, G4=9 is missing.

Saturday 15-Feb-2020

... by: James Havard

In the bottom left 3*3, there are 4 pairs that give a singles solution-
14, 16, 12, and 64

Saturday 15-Feb-2020

... by: numpl_npm

(u)H13 where (u in 1234) -> (u)J4
| 1H13 -> 1F1367=[F13-C7-J4|F6-J4|F7-J4]=J4
| 2H1 -> 2F567=[F56-J4|F7-J4]=J4
| 3H1 -> 3[C7|F7|C56&F56]=[C7-J4|F7-J4|C56&F56-J4]=J4
| 4H3 -> 4G8-J4

(6u)H13 (56u)G789   where (u in 1234)

(u)J7 -> (8u)H45 (7u)G23

(u)J1 -> -(u)H7
| 1J1 -> 1F367=[F3-C7|F6-H4|F7] -1H7
| 2J1 -> 2F567=[F56-H4|F7] -2H7
| 3H1 -> 3[C7|F7|C56&F56]=[C7|F7|C56&F56-H4] -3H7

(u)J1 -> -(u)H7 -(u)H45(∵ -(u)J7) (u)H8

-4H45(∵ -4J7) -4H8(∵ -4J1) 4H3

Then basics to the end.

Saturday 15-Feb-2020

... by: J

972 346 851
436 518 972
158 792 364

549 871 623
763 259 418
281 634 795

817 923 546
694 185 237
325 467 189

Saturday 15-Feb-2020

... by: James Havard

Used the H1=6 and H3=4 separately in my solver and found that the G2=1 can be paired with either the 4 or 6 for a singles solution.

Saturday 15-Feb-2020

... by: Frans Goosens

With trial and error

Combination A9=138 and F3=147

************************************************************
A9=1 F3=1 No solution, Fixed

Combination 2-digits cells

C3=8 No solution, Undo calculation
C3=9 No solution, Undo calculation
F1=2 No solution, Undo calculation
F1=7 No solution, Undo calculation
H3=4 No solution, Undo calculation
H3=6 No solution, Undo calculation
I1=2 No solution, Undo calculation
I1=3 No solution, Undo calculation

All reset to initial position

************************************************************
A9=1 F3=4 No solution, Fixed

Combination 2-digits cells

H3=1 No solution, Undo calculation
H3=6 No solution, Undo calculation

All reset to initial position

************************************************************
A9=1 F3=7 No solution, Fixed

Combination 2-digits cells

A2=3 No solution, Undo calculation
A2=6 ( A4=8 ) Solved,


#387--------------------------Solution
002 000 000-------------762 894 531
400 510 000-------------439 516 728
050 700 064-------------158 732 964

500 000 000-------------546 973 812
003 000 400-------------913 258 476
080 600 095-------------287 641 395

800 000 000-------------874 129 653
090 005 007-------------691 385 247
005 067 089-------------325 467 189

Total solving time is : 101 sec.
Number of logical steps is : 8627

Saturday 15-Feb-2020

... by: James Havard

531 subs and 521 seconds found 3 subs needed for a basic solve D2=4 D6=1 D9=3.
3*3 block manual search, found H1=6 with H3=4 that gives a singles solution.

Saturday 15-Feb-2020

... by: SuDokuFan

GE2(1234)G56, H8, J2, stte.

Saturday 15-Feb-2020

... by: yzfwsf

Column 9 as an extra cross line

Saturday 15-Feb-2020

... by: BobW

GExocet: 1234 G56, J2 H8; Eliminations: -4G5 -4G6 -4J2 -4H8 -6H7
Then singles to solution.

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