The New Sudoku Players' Forum

by **ArkieTech** » Wed Nov 22, 2017 11:02 pm

Code: Select all: *-----------* |4..|6..|17.| |.5.|3..|...| |..7|...|..4| |---+---+---| |59.|...|.68| |...|.2.|..9| |...|..7|...| |---+---+---| |...|8..|.2.| |9..|...|63.| |.25|.3.|...| *-----------*

by **pjb** » Wed Nov 22, 2017 11:11 pm

Code: Select all: 4 38 389 | 6 589 a2589 | 1 7 b3-2 128 5 189 | 3 7 4 | 289 89 6 2368 368 7 | 12 189 1289 |c23589 589 4 ------------------------+----------------------+--------------------- 5 9 2 | 14 14 3 | 7 6 8 13678 134678 13468 | 5 2 68 | 34 14 9 1368 13468 13468 | 9 68 7 |d2345 145 e23 ------------------------+----------------------+--------------------- 1367 13467 1346 | 8 14569 1569 | 49 2 157 9 1478 148 | 1247 145 125 | 6 3 157 167 2 5 | 147 3 169 | 489 489 17

(2)r1c6 = (2-3)r1c9 = (3-5)r3c7 = (5-2)r6c7 = r6c9 => -2 r1c9; stte
or shorter
(2=3)r6c9 - r1c9 = (3-5)r3c7 = r6c7 => -2 r6c7; stte

Phil

by **SteveG48** » Thu Nov 23, 2017 1:58 am

Code: Select all: *-----------------------------------------------------------------------------* | 4 38 389 | 6 589 2589 | 1 7 3-2 | | 128 5 189 | 3 7 4 |b289 89 6 | | 2368 368 7 | 12 189 1289 | 23589 589 4 | *-------------------------+-------------------------+-------------------------| | 5 9 2 | 14 14 3 | 7 6 8 | | 13678 134678 13468 | 5 2 68 |a34 14 9 | | 1368 13468 13468 | 9 68 7 | 345-2 145 a23 | *-------------------------+-------------------------+-------------------------| | 1367 13467 1346 | 8 14569 1569 |b49 2 157 | | 9 1478 148 | 1247 145 125 | 6 3 157 | | 167 2 5 | 147 3 169 |b489 489 17 | *-----------------------------------------------------------------------------*

(2=34)b6p49 - (4=289)r279c7 => -2 r1c9,r6c7 ; stte

by **Cenoman** » Thu Nov 23, 2017 12:38 pm

Code: Select all: +---------------------------+------------------------+----------------------+ | 4 38 389 | 6 589 c2589 | 1 7 b23 | | 128 5 189 | 3 7 4 | 289 89 6 | | 2368 368 7 | d12 d189 d1289 | a2389-5 d589 4 | +---------------------------+------------------------+----------------------+ | 5 9 2 | 14 14 3 | 7 6 8 | | 13678 134678 13468 | 5 2 68 | 34 14 9 | | 1368 13468 13468 | 9 68 7 | 2345 145 23 | +---------------------------+------------------------+----------------------+ | 1367 13467 1346 | 8 14569 1569 | 49 2 157 | | 9 1478 148 | 1247 145 125 | 6 3 157 | | 167 2 5 | 147 3 169 | 489 489 17 | +---------------------------+------------------------+----------------------+

(3)r3c7 = (3-2)r1c9 = r1c6 - (2=5)r3c4568 => -5 r3c7; stte

Alternative:

Code: Select all: +---------------------------+------------------------+----------------------+ | 4 38 389 | 6 589 2589 | 1 7 z3-2 | | 128 5 189 | 3 7 4 | a289* x89* 6 | | 2368 368 7 | 12 189 1289 | y23589 x589 4 | +---------------------------+------------------------+----------------------+ | 5 9 2 | 14 14 3 | 7 6 8 | | 13678 134678 13468 | 5 2 68 | B34 14 9 | | 1368 13468 13468 | 9 68 7 | 2345 145 B23 | +---------------------------+------------------------+----------------------+ | 1367 13467 1346 | 8 14569 1569 | 49 2 157 | | 9 1478 148 | 1247 145 125 | 6 3 157 | | 167 2 5 | 147 3 169 | A489* x489* 17 | +---------------------------+------------------------+----------------------+

UR(89)r29c78 using internals
(2)r2c7
(4)r9c7 - (4=2)b6p49
(489-5)r239c8 = (5-3)r3c7 = (3)r1c9
=> -2 r1c9; stte

Cenoman

by **Sudtyro2** » Thu Nov 23, 2017 10:00 pm

Cenoman wrote:UR(89)r29c78 using internals
(2)r2c7
(4)r9c7 - (4=2)b6p49
(489-5)r239c8 = (5-3)r3c7 = (3)r1c9
=> -2 r1c9; stte

Nice 3rd chain, Cenoman! Couldn't spot the 4r9c8.

SteveC

by **Cenoman** » Thu Nov 23, 2017 10:44 pm

Sudtyro2 wrote: Couldn't spot the 4r9c8.

Maybe the ALS version is easier to find and to read:
(4)r9c8 - (4=5)r56c8 - (5=2)b3p458

November 23, 2017