The New Sudoku Players' Forum

by **SteveG48** » Fri Dec 28, 2018 2:49 pm

Another that I stumbled upon in today's newspaper:

Code: Select all: *-----------* |8..|.17|...| |..6|.5.|4.2| |5..|...|.9.| |---+---+---| |...|6..|.3.| |1..|...|..4| |.5.|.82|...| |---+---+---| |.8.|...|..5| |4.5|.9.|2..| |9..|43.|..7| *-----------*

by **ArkieTech** » Fri Dec 28, 2018 7:31 pm

Code: Select all: *-----------------------------------------------------------* | 8 4 29 | 29 1 7 | 3 5 6 | | 37 1379 6 | 389 5 389 | 4 178 2 | | 5 1237 1237 | 238 6 4 | 178 9 18 | *-------------------+-------------------+-------------------| | 2 b79 789 | 6 4 b19 | 5 3 189 | | 1 369 389 | 5 7 39 | 68 2 4 | | 36 5 4 | 139 8 2 | 167 167 19 | *-------------------+-------------------+-------------------| | 367 8 137 | 17 2 a16 | 9 4 5 | | 4 c167 5 | 178 9 18-6 | 2 d16 3 | | 9 126 12 | 4 3 5 | 168 168 7 | *-----------------------------------------------------------* [(6=1)r7c6-(1=7)r4c26-(7=6)r8c28]-6rr8c6; ste

by **SpAce** » Fri Dec 28, 2018 8:13 pm

Code: Select all: .-------------------.----------------.-----------------. | 8 4 29 | 29 1 7 | 3 5 6 | | 37 1379 6 | 389 5 389 | 4 178 2 | | 5 1237 1237 | 238 6 4 | 178 9 18 | :-------------------+----------------+-----------------: | 2 b79 789 | 6 4 c(1)9 | 5 3 189 | | 1 369 389 | 5 7 39 | 68 2 4 | | 36 5 4 | 139 8 2 | 167 167 19 | :-------------------+----------------+-----------------: | 367 8 137 | 17 2 c(16) | 9 4 5 | | 4 a(16)7 5 | 178 9 8-16 | 2 a(16) 3 | | 9 126 12 | 4 3 5 | 168 168 7 | '-------------------'----------------'-----------------'

ALS XY-Wing: (16=7)r8c82 - (7=9)r4c2 - (9=16)r47c6 => -16 r8c6; stte

(Seems to be almost like Dan's but with an unnecessary extra elimination.)

by **Cenoman** » Fri Dec 28, 2018 10:55 pm

Code: Select all: +----------------------+-------------------+--------------------+ | 8 4 29 | 29 1 7 | 3 5 6 | | C37 1379 6 | 389 5 389 | 4 B178 2 | | 5 1237 1237 | 238 6 4 | 178 9 18 | +----------------------+-------------------+--------------------+ | 2 79 789 | 6 4 19 | 5 3 189 | | 1 39-6 389 | 5 7 39 |za68# 2 4 | | C36* 5 4 | 139 8 2 | 167* A167# 19 | +----------------------+-------------------+--------------------+ | 367* 8 137 | 17 2 16 | 9 4 5 | | 4 a167# 5 | 178 9 168 | 2 16 3 | | 9 126* 12 | 4 3 5 | y168* x168# 7 | +----------------------+-------------------+--------------------+

In the 6s, 5-link oddagon (*) having four guardians (#)
(6)r5c7, r8c2
(6-7)r6c8 = r2c8 - (73=6)r26c1
(6-8)r9c8 = r9c7 - (8=6)r5c7
=> -6 r5c2; ste

by **Ngisa** » Sat Dec 29, 2018 5:28 pm

Code: Select all: +-----------------------+-------------------+---------------------+ | 8 4 29 | 29 1 7 | 3 5 6 | | 37 1379 6 | 389 5 389 | 4 178 2 | | 5 1237 1237 | 238 6 4 | 178 9 18 | +-----------------------+-------------------+---------------------+ | 2 c79 b789 | 6 4 19 | 5 3 la8-19| | 1 j369 389 | 5 7 39 |k68 2 4 | |i36 5 4 | 139 8 2 | 167 167 19 | +-----------------------+-------------------+---------------------+ |h367 8 137 | 17 2 g16 | 9 4 5 | | 4 d167 5 |e178 9 f168 | 2 16 3 | | 9 126 12 | 4 3 5 | 168 168 7 | +-----------------------+-------------------+---------------------+

(8)r4c9 = (8-7)r4c3 = r4c2 - r8c2 = (7-8)r8c4 = (8-6)r8c6 = r7c6 - r7c1 = r6c1 - r5c2 = (6-8)r5c7 = (8)r4c9 => - 19r4c9; stte

Clement

Steve Stumble XXIII