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Thursday 23-May-2019

... by: numpl_npm

MSLS: 1267 / 34589 found. Then +126[E46.F6].
And +-6E4 => solved with Solver.

Saturday 18-May-2019

... by: Frans Goosens

With trial and error

Combination A1=178 and I9=245

************************************************************
A1=1 I9=2 No solution, Fixed

Combination 2-digits cells

F1=5 No solution, Undo calculation
F1=7 ( B1=4 ) Solved,


#348--------------------------Solution
003 400 009-------------123 486 759
050 009 000-------------457 129 836
000 000 210-------------968 753 214

200 070 000-------------236 975 481
084 000 000-------------584 631 927
009 800 003-------------719 842 563

090 500 008-------------392 567 148
600 000 070-------------641 298 375
000 010 600-------------875 314 692

Total solving time is : 13 sec.
Number of logical steps is : 543

Saturday 18-May-2019

... by: James Havard

128 guesses in 3 1/2 minutes to solve. Took 5 of the guesses to solve in basics.
B4=1, A2=2, C6=3, B8=3, and A8=5.

Saturday 18-May-2019

... by: Algo

22> Hidden single in rC = 9 / pv removed 3
> Pointing pairs 3 in blkA3 rBc7,rBc8 / pv removed 2

Single-cell guess (237 trials)
> Contradiction: rAc6 pv [1, 2, 5, 6, 7, 8] canot be 8 (vio) / pv removed 1
> Contradiction: rIc8 pv [2, 3, 4, 5, 9] canot be 2 (vio) / pv removed 1
> Contradiction: rIc1 pv [3, 4, 5, 7, 8] canot be 7 (vio) / pv removed 1
> Contradiction: rGc6 pv [2, 3, 4, 6, 7] canot be 3 (vio) / pv removed 1

Two-cell guess (199 trials)
23> Guess1x in rAc1 = 1 from pv [1, 7, 8] / pv removed 9
24> Guess2x in rCc2 = 6 from pv [4, 6, 7] / pv removed 11
25> Hidden single in rB = 1 / pv removed 5
26> Hidden single in rC = 4 / pv removed 8
27> Hidden single in rB = 4 / pv removed 4
28> Hidden single in c1 = 8 / pv removed 5
29> Hidden single in c3 = 6 / pv removed 6
30> Hidden single in c4 = 6 / pv removed 9
31> Hidden single in rF = 6 / pv removed 5
32> Hidden single in c9 = 6 / pv removed 2
33> Hidden single in c9 = 7 / pv removed 6
34> Hidden single in bB3 = 2 / pv removed 5
> X Wing 2 in c4,c9 under rH,rI / pv removed 7
> Swordfish 2 in rB,rF,rG under c3,c5,c6 / pv removed 2
> Y Wing 5 Key rDc2 [1, 3] Pincers rEc1 [3, 5] and rDc9 [1, 5] / pv removed 1
> Naked quads [5, 6, 7, 8] in rA c5,c6,c7,c8 / pv removed 1
> Pointing pairs 7 in blkA1 rBc3,rCc3 / pv removed 2
> Pointing pairs 5 in blkA3 rAc7,rAc8 / pv removed 2
> Pointing pairs 1 in blkB1 rDc2,rFc2 / pv removed 1
> XYZ Wing 3 Key rEc5 [3, 5, 9] Pincers rDc4 [3, 9] and rEc1 [3, 5] / pv removed 1
> XYZ Wing 5 Key rHc9 [1, 2, 5] Pincers rHc3 [1, 5] and rIc9 [2, 5] / pv removed 1
> Box line pairs 2 in c4 rH,rI / pv removed 2

Naked singles all the way.

20s (436 trials in total)

Saturday 18-May-2019

... by: BobW

With a single cell guess: J2=7, it's solvable with an X-wing and two reasonably simple inference chains.

With a two cell guess: A1=1 & C2=6, it's solvable with basics.

Saturday 18-May-2019

... by: SuDokuFan

1 x Single
1 x Locked Candidates
1 x Kite
Guess: E6 = 1, E7 = 9
Net shows D6<>6, J1<>7, J8<>2, B3<>6, A1 = 1
Chain proves D3 = 6.
Solvable with forcing chains to the end.

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