One more serate move difficult to explain

In the game 147, I found using skfr plenty of diamonds 7.7.

No one came when I re rated them using SE.

Here is an example

9.....8..

.7..8....

..6..7..5

.....49..

.3..7..5.

..21....6

5..2.....

....3..8.

..1..6..9

- Code: Select all
`9 1245 345 |3456 12456 1235 |8 123467 12347 `

1234 7 345 |34569 8 12359 |12346 123469 1234

12348 1248 6 |349 1249 7 |1234 12349 5

--------------------------------------------------------

1678 1568 578 |3568 256 4 |9 1237 12378

1468 3 489 |689 7 289 |124 5 1248

478 4589 2 |1 59 3589 |347 347 6

--------------------------------------------------------

5 4689 34789 |2 149 189 |13467 13467 1347

2467 2469 479 |4579 3 159 |124567 8 1247

23478 248 1 |4578 45 6 |23457 2347 9

SUDOKU EXPLAiNER first move

Nishio 7.8

If r4c4 = 8, then r5c3 must contain the value 8

If r4c4 = 8, then r5c3 <> 8

Chain 1:

(1) If r4c4 = 8, then r6c6 <> 8

(2) If r4c4 = 8 (initial assumption), then r5c6 <> 8

(3) If r5c6 <> 8 and r6c6 <> 8 (1), then r7c6 = 8

(4) If r7c6 = 8, then r7c3 <> 8

(5) If r4c4 = 8 (initial assumption), then r4c3 <> 8

(6) If r4c3 <> 8 and r7c3 <> 8 (4), then r5c3 = 8

Chain 2:

(1) If r4c4 = 8, then r4c9 <> 8

(2) If r4c9 <> 8, then r5c9 = 8

(3) If r5c9 = 8, then r5c3 <> 8

skfr equivalent move 1) r4c4 = 8 -> r4c9 <> 8

2) r4c9 <> 8 -> r5c9 = 8

3) r5c9 = 8 -> r5c3 <> 8

4) r4c4 = 8 -> r4c9 <> 8

5) r4c9 <> 8 -> r7c6 = 8

6) r7c6 = 8 -> r7c3 <> 8

7) r7c3 <> 8 and r5c3 <> 8 -> r4c3=8

1) r4c4 = 8 -> r4c3 <> 8The first one has a length 6+3=9 rated 7.8

The second one has a length 7+1=8 rated 7.7

champagne