The New Sudoku Players' Forum

by **Leren** » Thu Oct 14, 2021 8:06 pm

Code: Select all: *-----------* |...|8..|...| |.8.|.36|.4.| |...|.4.|6.2| |---+---+---| |96.|38.|...| |..8|15.|.69| |.3.|..9|...| |---+---+---| |.7.|6..|..5| |5..|...|9.6| |8..|5..|23.| *-----------* ...8......8..36.4.....4.6.296.38......815..69.3...9....7.6....55.....9.68..5..23.

by **jco** » Thu Oct 14, 2021 8:54 pm

After basics

Code: Select all: .------------------------------------------------. | 6 245 24 | 8 17 25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 5-9 179 |e79 4 157 | 6 8 2 | |------------------+---------------+-------------| | 9 6 12457 | 3 8 c247 | 147 25 17 | | 247 24 8 | 1 5 c247 | 3 6 9 | | 1247 3 12457 |d27 6 9 | 147 25 8 | |------------------+---------------+-------------| | 24 7 249 | 6 29 3 | 8 1 5 | | 5 12 3 | 4 12 8 | 9 7 6 | | 8 a19 6 | 5 179 b17 | 2 3 4 | '------------------------------------------------'

(9=1)r9c2 - (1=7)r9c6 - r45c6 = r6c4 - (7=9)r3c4 => -9 r3c2; ste

by **shye** » Thu Oct 14, 2021 8:59 pm

Code: Select all: .------------------.---------------.-------------. | 6 245 24 | 8 17 25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 #59 179 | 79 4 #157 | 6 8 2 | :------------------+---------------+-------------: | 9 6 12457 | 3 8 247 | 147 25 17 | | 247 24 8 | 1 5 247 | 3 6 9 | | 1247 3 12457 | 27 6 9 | 147 25 8 | :------------------+---------------+-------------: | 24 7 249 | 6 29 3 | 8 1 5 | | 5 12 3 | 4 12 8 | 9 7 6 | | 8 #9-1 6 | 5 179 #17 | 2 3 4 | '------------------'---------------'-------------'

l-wing
1r9c6 = (1-5)r3c6 = (5-9)r3c2 = 9r9c2
=> -1r9c2 stte

by **Cenoman** » Thu Oct 14, 2021 9:14 pm

Code: Select all: +-----------------------+--------------------+------------------+ | 6 245 24 | 8 17 25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 5-9 179 | b79 4 157 | 6 8 2 | +-----------------------+--------------------+------------------+ | 9 6 12457 | 3 8 247 | 147 25 17 | | 247 B24 8 | 1 5 aA247y | 3 6 9 | | 1247 3 12457 | b27 6 9 | 147 25 8 | +-----------------------+--------------------+------------------+ | 24 7 249 | 6 29 3 | 8 1 5 | | 5 B12 3 | 4 12 8 | 9 7 6 | | 8 B19z 6 | 5 179 17z | 2 3 4 | +-----------------------+--------------------+------------------+

Death Blossom, stem r5c6
(2)r5c6 - (2=79)r36c4
(4)r5c6 - (4=129)r589c2
(7)r5c6 - (7=19)r9c26
=> -9r3c2; ste

by **RSW** » Thu Oct 14, 2021 9:25 pm

Code: Select all: +----------------+---------------+-----------+ | 6 c#245 24 | 8 17 b#25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 59 179 | 79 4 157 | 6 8 2 | +----------------+---------------+-----------+ | 9 6 12457 | 3 8 #247 | 147 25 17 | | 247 #24 8 | 1 5 #247 | 3 6 9 | | 1247 3 12457 | 27 6 9 | 147 25 8 | +----------------+---------------+-----------+ | 24 7 249 | 6 29 3 | 8 1 5 | | 5 d#12 3 | 4 *2-1 8 | 9 7 6 | | 8 *9-1 6 | 5 179 a#17 | 2 3 4 | +----------------+---------------+-----------+

ALS(12457)r1459c6, ALS(1245)r158c2
(1)r9c6 == (5)r1c6 - (5)r1c2 == (1)r8c2 => -1r9c2 -1r8c5; stte

Website · by **denis_berthier** » Fri Oct 15, 2021 6:40 am

.

Code: Select all: Resolution state after Singles and whips[1]: +-------------------+-------------------+-------------------+ ! 6 245 1247 ! 8 17 1257 ! 17 9 3 ! ! 127 8 1279 ! 279 3 6 ! 5 4 17 ! ! 3 59 179 ! 79 4 157 ! 6 8 2 ! +-------------------+-------------------+-------------------+ ! 9 6 12457 ! 3 8 247 ! 147 25 17 ! ! 247 24 8 ! 1 5 247 ! 3 6 9 ! ! 1247 3 12457 ! 27 6 9 ! 147 25 8 ! +-------------------+-------------------+-------------------+ ! 24 7 249 ! 6 29 3 ! 8 1 5 ! ! 5 12 3 ! 4 12 8 ! 9 7 6 ! ! 8 19 6 ! 5 179 17 ! 2 3 4 ! +-------------------+-------------------+-------------------+

There are many 1-step solutions. Here are the simplest two:

Code: Select all: biv-chain[3]: r3c4{n9 n7} - c5n7{r1 r9} - r9n9{c5 c2} ==> r3c2≠9 stte

Code: Select all: biv-chain[3]: c5n7{r9 r1} - r3c4{n7 n9} - c2n9{r3 r9} ==> r9c5≠9 stte

by **rjamil** » Fri Oct 15, 2021 11:59 am

Code: Select all: +------------------+---------------+-------------+ | 6 245 24 | 8 17 25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 *59 179 | 79 4 *157 | 6 8 2 | +------------------+---------------+-------------+ | 9 6 12457 | 3 8 24-7| 147 25 17 | | 247 24 8 | 1 5 24-7| 3 6 9 | | 1247 3 12457 | 27 6 9 | 147 25 8 | +------------------+---------------+-------------+ | 24 7 249 | 6 29 3 | 8 1 5 | | 5 12 3 | 4 12 8 | 9 7 6 | | 8 *19 6 | 5 179 *17 | 2 3 4 | +------------------+---------------+-------------+

ALS move: 1579 @ r3c26 r9c26 => -7 @ r45c6; stte

R. Jamil

by **P.O.** » Fri Oct 15, 2021 5:21 pm

Code: Select all: after singles: 6 1245 12457 8 d+(12)-7 1257 157 9 3 127 8 b1257-9 b27+9 3 6 157 4 17 3 159 1579 c+79 4 157 6 8 2 9 6 12457 3 8 247 1457 25 17 247 24 8 1 5 247 3 6 9 1247 3 12457 27 6 9 1457 25 8 24 7 a24+9 6 a×2-9 3 8 1 5 5 12 3 4 d+(12) 8 9 7 6 8 19 6 5 179 17 2 3 4

r7n9{c5 c3} - r2n9{c3 c4} - r3c4{n9 n7} - c5{r1r8}{n1n2} => r7c5 <> 2
ste.

by **SteveG48** » Sat Oct 16, 2021 1:52 pm

Code: Select all: *--------------------------------------------------------------------* | 6 245 24 | 8 b17 25 | 17 9 3 | | 127 8 1279 | 279 3 6 | 5 4 17 | | 3 5-9 179 |c79 4 157 | 6 8 2 | *----------------------+----------------------+----------------------| | 9 6 12457 | 3 8 247 | 147 25 17 | | 247 24 8 | 1 5 247 | 3 6 9 | | 1247 3 12457 | 27 6 9 | 147 25 8 | *----------------------+----------------------+----------------------| | 24 7 249 | 6 29 3 | 8 1 5 | | 5 a12 3 | 4 b12 8 | 9 7 6 | | 8 a19 6 | 5 179 17 | 2 3 4 | *--------------------------------------------------------------------*

(9=12)r89c2 - (2=17)r18c5 - (7=9)r3c4 => -9 r3c2 ; stte

Leren's Puzzles 73