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Submitted by: uno hu

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enough sudokuin' time to move on.

16/Mar/19 1:53 AM
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1. Unique possibilities to 22 (all givens).
2. Whether c8=6;OR c8=5,b7=3=g8,h9=6;b9=29.UP44.
3. Whether i2=7;OR i2=5,h13=1=g4,f4=8;i9=8.UP81.
16/Mar/19 3:10 AM
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No need for step 3. Step 2 reaches UP81.
16/Mar/19 3:14 AM
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Basics to 23
1.if c8=5 => b7=3 g8=3 h9=6 if c8=6 h9=6
=> h9=6 solve
16/Mar/19 3:16 AM
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Basics to 23
1. ALS-XZ rule (6=1458)cefi8 - (8=356)b7.ac8 =>-6b9, -6g8; basics to 81
Note: example of overlapping ALSs (in c8)
16/Mar/19 5:16 AM
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@Alfred
Basics to 23
HP(29)ab1 =>NT(567)c238
HP(35)b37
Pointing 5f78, 6ac5, 7a45, 4a23, 5hi5, 3d23
d4=5

Note: in initial step of basics, HP(35)b37 is neeeded for your solution, as well as for mine.
16/Mar/19 5:16 AM
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That's a big bird!
16/Mar/19 5:49 AM
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Thanks Cenoman. I had 35 @ b37 and 29 @ ab1. I found d4=5 at step 2, but missed it at step 1.
Best Regards, Alfred.
16/Mar/19 8:13 AM
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