The New Sudoku Players' Forum

by **morl** » Sun Apr 15, 2018 11:14 am

Code: Select all: +-------+-------+-------+ | . 4 3 | . . . | . . . | | 8 . 7 | . . . | . . . | | 9 5 2 | . . . | . . . | +-------+-------+-------+ | . . . | 6 . . | . . 3 | | . . . | . . . | 2 1 6 | | . . . | . . 7 | 5 8 . | +-------+-------+-------+ | . . . | . 6 8 | . 9 . | | . . . | . 2 9 | 7 . 4 | | . . . | 3 4 . | . 6 1 | +-------+-------+-------+

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Have fun!
morl

by **pjb** » Sun Apr 15, 2018 12:46 pm

Code: Select all: 1 4 3 | 58 578 6 | 9 2 78 8 6 7 | 249 39 234 | 1 34 5 9 5 2 | 48 1378 134 | 6 34 78 ------------------------+----------------------+--------------------- 5-2 89-2 158 | 6 589 a12 | 4 7 3 3457 3789 458 | 589 589 34 | 2 1 6 2346 c23 146 | 4-2 b13 7 | 5 8 9 ------------------------+----------------------+--------------------- 45 1 45 | 7 6 8 | 3 9 2 36 38 68 | 1 2 9 | 7 5 4 27 27 9 | 3 4 5 | 8 6 1

XY-wing: (2=1)r4c6 - (1=3)r6c5 - (3=2)r6c2 => -2 r4c12, r6c4; stte

Phil

by **Cenoman** » Sun Apr 15, 2018 3:16 pm

Code: Select all: +----------------------+---------------------+-----------------+ | 1 4 3 | 58 578 6 | 9 2 78 | | 8 6 7 | 249 39 234 | 1 34 5 | | 9 5 2 | 48 1378 134 | 6 34 78 | +----------------------+---------------------+-----------------+ | 25 289 158 | 6 589 12 | 4 7 3 | | 3457 3789 458 | 589 589 b34 | 2 1 6 | | d2346 23 d46-1 | c24 a13 7 | 5 8 9 | +----------------------+---------------------+-----------------+ | 45 1 45 | 7 6 8 | 3 9 2 | | 36 38 68 | 1 2 9 | 7 5 4 | | 27 27 9 | 3 4 5 | 8 6 1 | +----------------------+---------------------+-----------------+

Almost hidden pair (46)r6c13
(1=3)r6c5 - (3=4)r5c6 - r6c4 = (46)r6c13 => -1 r6c3; stte

by **Marty R.** » Sun Apr 15, 2018 3:36 pm

Code: Select all: ┌────────────────────┬────────────────────┬────────────────────┐ │ 1 4 3 │ 58 578 6 │ 9 2 78 │ │ │ │ │ │ 8 6 7 │ 249 39 234 │ 1 34 5 │ │ │ │ │ │ 9 5 2 │ 48 1378 134 │ 6 34 78 │ ├────────────────────┼────────────────────┼────────────────────┤ │ 25 289 158 │ 6 589 12 │ 4 7 3 │ │ │ │ │ │ 3457 3789 458 │ 589 589 34 │ 2 1 6 │ │ │ │ │ │ 2346 23 146 │ 24 13 7 │ 5 8 9 │ ├────────────────────┼────────────────────┼────────────────────┤ │ 45 1 45 │ 7 6 8 │ 3 9 2 │ │ │ │ │ │ 36 38 68 │ 1 2 9 │ 7 5 4 │ │ │ │ │ │ 27 27 9 │ 3 4 5 │ 8 6 1 │ └────────────────────┴────────────────────┴────────────────────┘

Type 3 UR (34) internals
1r3c6=2r2c6-r2c4=r6c4-(2=31)r6c25=> -1r4c6,r3c5

by **Sudtyro2** » Sun Apr 15, 2018 4:01 pm

Code: Select all: +------------------+----------------+--------------+ | 1 4 3 | 58 578 6 | 9 2 78 | | 8 6 7 | 249 39 234 | 1 34 5 | | 9 5 2 | 48 1378 134 | 6 34 78 | +------------------+----------------+--------------+ | 25 289 158 | 6 589 12 | 4 7 3 | | 457-3 789-3 458 | 589 589 b34 | 2 1 6 | | 2346 a23 146 | b24 1-3 7 | 5 8 9 | +------------------+----------------+--------------+ | 45 1 45 | 7 6 8 | 3 9 2 | | 36 38 68 | 1 2 9 | 7 5 4 | | 27 27 9 | 3 4 5 | 8 6 1 | +------------------+----------------+--------------+

Similar to Phil's...
(3=2)r6c2 - (2=43)b5p67 => -3r6c5,r5c12; stte

SteveC

by **Leren** » Sun Apr 15, 2018 8:34 pm

The XY Wings were definitely the way to go, but just to be different :

Code: Select all: *-------------------------------------------* | 1 4 3 | 58 578 6 | 9 2 78 | | 8 6 7 | 249 39 234 | 1 34 5 | | 9 5 2 | 48 1378 134 | 6 34 78 | |----------------+----------------+---------| | 25 289 158 | 6 589 12 | 4 7 3 | | 3457 3789 458 | 589 589 c34 | 2 1 6 | | 2346 a23 146 |d4-2 b13 7 | 5 8 9 | |----------------+----------------+---------| | 45 1 45 | 7 6 8 | 3 9 2 | | 36 38 68 | 1 2 9 | 7 5 4 | | 27 27 9 | 3 4 5 | 8 6 1 | *-------------------------------------------*

H2 Wing: (2=3) r6c2 - r6c5 = (3-4) r5c6 = (4) r6c4 => - 2 r6c4; stte

Leren

One Trick 3