The New Sudoku Players' Forum

by **ArkieTech** » Thu May 02, 2013 1:10 am

Code: Select all: *-----------* |..3|.9.|.85| |...|8.3|.1.| |81.|7.5|349| |---+---+---| |2..|...|1..| |..8|...|7..| |..1|...|..3| |---+---+---| |982|3.6|.74| |.5.|9.2|...| |63.|.5.|9..| *-----------*

by **pjb** » Thu May 02, 2013 3:55 am

An xy chain to start:

Code: Select all: 47 27 3 | 16 9 14 | 26 8 5 a45 29 b59 | 8 6-4 3 | 26 1 7 8 1 6 | 7 2 5 | 3 4 9 ---------------------+----------------------+--------------------- 2 47 c59 |d56 3 47 | 1 569 8 3 469 8 | 156 e46 149 | 7 569 2 57 679 1 | 2 8 79 | 4 569 3 ---------------------+----------------------+--------------------- 9 8 2 | 3 1 6 | 5 7 4 1 5 4 | 9 7 2 | 8 3 6 6 3 7 | 4 5 8 | 9 2 1

(4=5) r2c1 - (5=9) r2c3 - (9=5) r4c3 - (5=6) r4c4 - (6=4) r5c5 => r2c5 <> 4; stte
Phil

by **Leren** » Thu May 02, 2013 10:22 am

Code: Select all: *--------------------------------------------------------------* | 47 27 3 | 16 9 14 | 26 8 5 | |b45 29 a59 | 8 c46 3 | 26 1 7 | | 8 1 6 | 7 2 5 | 3 4 9 | |--------------------+--------------------+--------------------| | 2 47 9-5 |e56 3 47 | 1 569 8 | | 3 469 8 | 156 d46 149 | 7 569 2 | | 57 679 1 | 2 8 79 | 4 569 3 | |--------------------+--------------------+--------------------| | 9 8 2 | 3 1 6 | 5 7 4 | | 1 5 4 | 9 7 2 | 8 3 6 | | 6 3 7 | 4 5 8 | 9 2 1 | *--------------------------------------------------------------*

(5) r2c3 = (5-4) r2c1 = r2c5 - (4=6) r5c5 - (6=5) r4c4 => -5 r4c3; stte

Leren

by **ArkieTech** » Thu May 02, 2013 11:54 am

Code: Select all: *--------------------------------------------------* |b47 27 3 |b16 9 b14 |b26 8 5 | | 45 29 59 | 8 46 3 | 26 1 7 | | 8 1 6 | 7 2 5 | 3 4 9 | |----------------+----------------+----------------| | 2 47 9-5 |a56 3 47 | 1 569 8 | | 3 469 8 | 156 46 149 | 7 569 2 | |c57 679 1 | 2 8 79 | 4 569 3 | |----------------+----------------+----------------| | 9 8 2 | 3 1 6 | 5 7 4 | | 1 5 4 | 9 7 2 | 8 3 6 | | 6 3 7 | 4 5 8 | 9 2 1 | *--------------------------------------------------* als xy-wing (5=6)r4c4-(6=7)r1c1467-(7=5)r6c1 => -5r4c3; ste

by **Leren** » Thu May 02, 2013 12:19 pm

Code: Select all: *--------------------------------------------------------------* | 47 27 3 | 1-6 9 14 | 26 8 5 | |a45 29 b59 | 8 a46 3 | 26 1 7 | | 8 1 6 | 7 2 5 | 3 4 9 | |--------------------+--------------------+--------------------| | 2 47 c59 |c56 3 47 | 1 569 8 | | 3 469 8 | 156 4-6 149 | 7 569 2 | | 57 679 1 | 2 8 79 | 4 569 3 | |--------------------+--------------------+--------------------| | 9 8 2 | 3 1 6 | 5 7 4 | | 1 5 4 | 9 7 2 | 8 3 6 | | 6 3 7 | 4 5 8 | 9 2 1 | *--------------------------------------------------------------*

als-xy wing: (6=5) r2c15 - (5=9) r2c3 - (9=6) r4c34 => -6 r1c4, r5c5; stte

Leren

by **Marty R.** » Thu May 02, 2013 4:07 pm

Code: Select all: +-----------+------------+----------+ | 47 27 3 | 16 9 14 | 26 8 5 | | 45 29 59 | 8 46 3 | 26 1 7 | | 8 1 6 | 7 2 5 | 3 4 9 | +-----------+------------+----------+ | 2 47 59 | 56 3 47 | 1 569 8 | | 3 469 8 | 156 46 149 | 7 569 2 | | 57 679 1 | 2 8 79 | 4 569 3 | +-----------+------------+----------+ | 9 8 2 | 3 1 6 | 5 7 4 | | 1 5 4 | 9 7 2 | 8 3 6 | | 6 3 7 | 4 5 8 | 9 2 1 | +-----------+------------+----------+

Play this puzzle online at the Daily Sudoku site

XY-Chain (5=7)r6c1-(7=4)r1c1-(4=1)r1c6-(1=6)r1c4-(6=5)R4C4=>R4C3<>5

by **Ngisa** » Thu May 02, 2013 4:35 pm

Also XY-Chain:
(6=5)r4c4-(5=9)r4c3-(9=5)r2c3-(5=4)r2c2-(4=7)r1c1-(7=2)r1c2-(2=6)r1c7 => r1c4<>6, stte.

Vanhegan Fiendish May 1, 2013