The New Sudoku Players' Forum

by **mith** » Mon Sep 07, 2020 3:00 pm

Code: Select all: +-------+-------+-------+ | . . . | 9 8 . | . 7 . | | . 6 . | . . . | . . . | | 5 . . | . . 6 | . . 4 | +-------+-------+-------+ | 4 . . | 3 . . | . . . | | . . 7 | . . . | 8 . . | | . . . | . . 5 | . . 9 | +-------+-------+-------+ | 9 . . | 2 . . | . . 3 | | . . . | . . . | . 2 . | | . 8 . | . 7 4 | . . . | +-------+-------+-------+ ...98..7..6.......5....6..44..3.......7...8.......5..99..2....3.......2..8..74...

by **SpAce** » Mon Sep 07, 2020 3:18 pm

original: Show

Code: Select all: .-----------------------.---------------------.----------------------. | 123 1234 1234 | 9 8 123 | 56 7 56 | | b12378 6 12389 | 45 45 b1237 | 1239 1389 128 | | 5 12379 12389 | 1-7 123 6 | 1239 1389 4 | :-----------------------+---------------------+----------------------: | 4 1259 125689 | 3 1269 8-7 | 12567 156 12567 | | 1236 12359 7 | 146 12469 129 | 8 13456 1256 | | a12368 123 12368 | a78 1246 5 | 123467 1346 9 | :-----------------------+---------------------+----------------------: | 9 1457 1456 | 2 156 18 | 14567 14568 3 | | 167 1457 1456 | 1568 39 39 | 14567 2 15678 | | 23 8 23 | 156 7 4 | 1569 1569 156 | '-----------------------'---------------------'----------------------'

M2-Wing:

(78)r6c41 = (87)r2c16 => -7 r3c4,r4c6

by **SteveG48** » Mon Sep 07, 2020 5:05 pm

Code: Select all: *-----------------------------------------------------------------------------* | 123 1234 1234 | 9 8 123 | 56 7 56 | |c12378 6 12389 | 45 45 1237 | 1239 1389 128 | | 5 c12379 12389 | 1-7 123 6 | 1239 1389 4 | *-------------------------+-------------------------+-------------------------| | 4 1259 125689 | 3 1269 78 | 12567 156 12567 | | 1236 12359 7 | 146 12469 129 | 8 13456 1256 | |b12368 123 12368 |a78 1246 5 | 123467 1346 9 | *-------------------------+-------------------------+-------------------------| | 9 1457 1456 | 2 156 18 | 14567 14568 3 | | 167 1457 1456 | 1568 39 39 | 14567 2 15678 | | 23 8 23 | 156 7 4 | 1569 1569 156 | *-----------------------------------------------------------------------------*

Almost the same

:

(7=8)r6c4 - 8r6c1 = (87)b1p48 => -7 r3c4 ; stte

by **Cenoman** » Mon Sep 07, 2020 8:36 pm

Code: Select all: +---------------------------+------------------------+---------------------------+ | 123 1234 1234 | 9 8 123 | 56 7 56 | | 12378 6 12389 | 45 45 1237 | 1239 1389 128 | | 5 12379 12389 | 17 123 6 | 1239 1389 4 | +---------------------------+------------------------+---------------------------+ | 4 1259 125689 | 3 1269 c78 | 12567 156 d12567 | | 1236 12359 7 | 146 12469 129 | 8 13456 1256 | | 12368 123 12368 | 78 1246 5 | 123467 1346 9 | +---------------------------+------------------------+---------------------------+ | 9 1457 1456 | 2 156 b18 | 14567 a14568 3 | | 167 1457 1456 | 1568 39 39 | 14567 2 e1567-8 | | 23 8 23 | 156 7 4 | 1569 1569 156 | +---------------------------+------------------------+---------------------------+

S-Wing: (8)r7c8 = r7c6 - (8=7)r4c6 - r4c9 = (7)r8c9 => -8 r8c9; ste

by **Leren** » Mon Sep 07, 2020 8:46 pm

This puzzle has 180 rotational symmetry with isomorphism [26] [35] [49] [78] + [1], so r5c5 = 1 at the start, but it doesn't help much.

Leren

by **mith** » Tue Sep 08, 2020 1:03 am

Yep, having already posted a one-stepper relying on the symmetry, I figured I'd post one where the symmetry basically did nothing.

Donut