The New Sudoku Players' Forum

by **200e200w** » Sat Feb 03, 2018 11:13 am

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

Enjoy solving!

200e200w

by **ArkieTech** » Sat Feb 03, 2018 1:59 pm

Code: Select all: *-----------------------------------------------------------* |c68 2 68 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | |-------------------+-------------------+-------------------| | 237 1 5 | 9 27 37 | 4 6 8 | | 2379 6 27 | 4 1278 378 |*79 5 *1-79 | |d789 4 78 | 17 6 5 | 3 2 e179 | |-------------------+-------------------+-------------------| | 24 7 1 | 23 38 9 | 5 48 6 | |b26 8 9 | 5 4 67 |a27 1 3 | | 5 3 246 | 127 178 678 |*79-2 48 *f79 | *-----------------------------------------------------------* [(2r8c7=(2-6)r8c1=(6-8)r1c1=(8-9)r6c1=r6c9-r9c9=9r9c7]-[(2r9c7=ur:79r59c79]-79r5c9; ste

by **Cenoman** » Sat Feb 03, 2018 4:15 pm

Two simple steps:

Code: Select all: +--------------------+---------------------+-------------------+ | 68 2 68 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | +--------------------+---------------------+-------------------+ | 237 1 5 | 9 27 d37 | 4 6 8 | | f237-9 6 27 | 4 1278 e378 | a79 5 179 | | 789 4 78 | 17 6 5 | 3 2 179 | +--------------------+---------------------+-------------------+ | 24 7 1 | 23 38 9 | 5 48 6 | | 26 8 9 | 5 4 c67 | b27 1 3 | | 5 3 246 | 127 178 678 | 279 48 79 | +--------------------+---------------------+-------------------+

1. (9=7)e7-h7=h6-(7=3)d6-e6=(3)e1 =>-9e1; 11 placements

End with UR type 1:

Code: Select all: +-----------------+------------------+------------------+ | 8 2 6 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | +-----------------+------------------+------------------+ | 27 1 5 | 9 27 3 | 4 6 8 | | 3 6 27 | 4 127 8 | 79* 5 79*+1 | | 9 4 8 | 17 6 5 | 3 2 17 | +-----------------+------------------+------------------+ | 24 7 1 | 23 38 9 | 5 48 6 | | 6 8 9 | 5 4 7 | 2 1 3 | | 5 3 24 | 12 18 6 | 79* 48 79* | +-----------------+------------------+------------------+

2. UR(79)r59c79 => +1 r5c9; stte

by **SteveG48** » Sat Feb 03, 2018 8:06 pm

Code: Select all: *-------------------------------------------------------------* | 68 2 68 | 37 cd37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | |cdh47 9 47 | 8 5 1 | 6 3 2 | *---------------------+-------------------+-------------------| | eh237 1 5 | 9 e27 f37 | 4 6 8 | | h2379 6 27 | 4 1278 378 |i79 5 179 | | 789 4 78 | 17 6 5 | 3 2 179 | *---------------------+-------------------+-------------------| | bh24 7 1 | 23 b38 9 | 5 ab4-8 6 | | g26 8 9 | 5 4 gj67 |j27 1 3 | | 5 3 246 | 127 178 678 | 279 48 79 | *-------------------------------------------------------------*

4r7c8 = ((38)r7c58)&(4r7c1) - (3|4)r1c5,r3c1 = (7r1c5)&(7r3c1) - r4c15 = r4c6 - (7=26)r8c16* - (2=3479)r3457c1 - (9=7)r5c7 - (7)r7c*67 contradiction 7r8 => -8 r7c8 ; stte

by **Leren** » Sat Feb 03, 2018 9:07 pm

Code: Select all: *-----------------------------------------* |a68 2 68 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | |------------+--------------+-------------| | 237 1 5 | 9 27 37 | 4 6 8 | | 2379 6 27 | 4 1278 378 |d79 5 179 | |f79-8 4 78 | 17 6 5 | 3 2 e179 | |------------+--------------+-------------| | 24 7 1 | 23 38 9 | 5 48 6 | |b26 8 9 | 5 4 67 |c27 1 3 | | 5 3 246 | 127 178 678 | 279 48 79 | *-----------------------------------------*

(8=6) r1c1 - (6=2) r8c1 - (2=7) r8c7 - (7=9) r5c7 - r6c9 = (9) r6c1 => - 8 r6c1

Code: Select all: *--------------------------------------* | 8 2 6 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | |----------+------------+--------------| | 27 1 5 | 9 27 3 | 4 6 8 | | 3 6 2-7 | 4 *12+7 8 | 9-7 5 *19+7 | | 9 4 8 | 17 6 5 | 3 2 17 | |----------+------------+--------------| | 24 7 1 | 23 38 9 | 5 48 6 | | 6 8 9 | 5 4 7 | 2 1 3 | | 5 3 24 | 12 18 6 | 79 48 79 | *--------------------------------------*

BUG + 2: Cells r5c5 & r5c9 Digit 7 => - 7 r5c37; stte

Leren

by **Leren** » Sat Feb 03, 2018 9:29 pm

Code: Select all: *------------------------------------------* | 68 2 68 | 37 b37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | | 47 9 47 | 8 5 1 | 6 3 2 | |------------+---------------+-------------| | 37-2 1 5 | 9 b27 37 | 4 6 8 | | 2379 6 27 | 4 1278 378 | 79 5 179 | | 789 4 78 | 17 6 5 | 3 2 179 | |------------+---------------+-------------| |a24 7 1 | 23 b38 9 | 5 a48 6 | | 26 8 9 | 5 4 67 | 27 1 3 | | 5 3 246 | 127 178 678 | 279 48 79 | *------------------------------------------*

XY Chain / ALS XZ Rule: X = 8, Z = 2: (2=8) r7c18 - (8=2) r147c5 => - 2 r4c1

Code: Select all: *---------------------------------------* | 68 2 68 | 37 37 4 | 1 9 5 | | 1 5 3 | 6 9 2 | 8 7 4 | |b47 9 47 | 8 5 1 | 6 3 2 | |------------+-------------+------------| |b37 1 5 | 9 2 37 | 4 6 8 | |b2379 6 27 | 4 178 378 |a79 5 179 | | 789 4 78 | 17 6 5 | 3 2 179 | |------------+-------------+------------| |b24 7 1 | 23 38 9 | 5 48 6 | | 6-2 8 9 | 5 4 67 |b27 1 3 | | 5 3 246 | 127 178 678 | 279 48 79 | *---------------------------------------*

ALS XZ Rule: X = 9, Z = 2: (2=9) r58c7 - (9=2) r3457c1 => - 2 r8c1; stte

Leren

by **pjb** » Sun Feb 04, 2018 12:13 am

I have to join the 2 steppers:
1. (7)r8c6 = r8c7 - (7=9)r5c7 - (9=47236)r34578c1 => -6 r8c6

2. (7=1)r6c9 - r6c4 = (1-2)r9c4 = r9c3 - (2=791)r5c379 => -1 r6c9; stte

Phil

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