The New Sudoku Players' Forum

by **ArkieTech** » Thu Aug 15, 2013 12:45 am

Code: Select all: *-----------* |...|...|751| |3..|...|...| |5.6|.4.|9.2| |---+---+---| |..2|7..|..9| |.3.|.24|6..| |.14|.9.|...| |---+---+---| |.2.|...|..7| |...|9..|.65| |..9|...|...| *-----------*

by **pjb** » Thu Aug 15, 2013 1:42 am

Code: Select all: 2 4 8 | 36 36 9 | 7 5 1 3 9 1 | 25 57 257 | 48 48 6 5 7 6 | 18 4 18 | 9 3 2 ---------------------+----------------------+--------------------- 68 56 2 | 7 13568 13568 | 145 14 9 9 3 57 |a15 2 4 | 6 b17 8 678 1 4 | 68-5 9 68-5 |d25 c27 3 ---------------------+----------------------+--------------------- 16 2 35 | 4 13568 13568 | 138 9 7 4 8 37 | 9 137 1237 | 123 6 5 167 56 9 | 123568 135678 1235678| 1238 128 4

A little XY chain: (5=1) r5c4 - (1=7) r5c8 - (7=2) r6c8 - (2=5) r6c7 => -5 r6c46; stte
Phil

by **Leren** » Thu Aug 15, 2013 4:16 am

Code: Select all: *-----------------------------------------------------------------------* | 2 4 8 | 36 36 9 | 7 5 1 | | 3 9 1 | 25 57 257 | 48 48 6 | | 5 7 6 | 18 4 18 | 9 3 2 | |-----------------------+-----------------------+-----------------------| | 68 56 2 | 7 13568 13568 | 145 14 9 | | 9 3 P57 | 1-5 2 4 | 6 17 8 | |B678 1 4 |P568 9 P568 | 25 27 3 | |-----------------------+-----------------------+-----------------------| | 16 2 35 | 4 13568 13568 | 138 9 7 | | 4 8 37 | 9 137 1237 | 123 6 5 | | 167 56 9 | 123568 135678 1235678 | 1238 128 4 | *-----------------------------------------------------------------------*

WXY-Z Wing (678-5): Base r6c1 Pincers r5c3, r6c46 => - 5 r5c4; stte

Leren

by **ArkieTech** » Thu Aug 15, 2013 11:40 am

Code: Select all: *--------------------------------------------------------------------------------------* | 2 4 8 | 36 36 9 | 7 5 1 | | 3 9 1 | 25 57 257 | 48 48 6 | | 5 7 6 | 18 4 18 | 9 3 2 | |----------------------------+----------------------------+----------------------------| | 68 56 2 | 7 13568 13568 | 145 14 9 | | 9 3 5-7 |b15 2 4 | 6 a17 8 | |c678 1 4 |c568 9 c568 | 25 2-7 3 | |----------------------------+----------------------------+----------------------------| | 16 2 35 | 4 13568 13568 | 138 9 7 | | 4 8 37 | 9 137 1237 | 123 6 5 | | 167 56 9 | 123568 135678 1235678 | 1238 128 4 | *--------------------------------------------------------------------------------------* (7=1)r5c8-(1=5)r5c4-(5=7)r6c146 => -7r5c3,r6c8; ste

by **tlanglet** » Thu Aug 15, 2013 1:54 pm

Code: Select all: *--------------------------------------------------------------------------------------* | 2 4 8 | 36 36 9 | 7 5 1 | | 3 9 1 | 25 57 257 | 48 48 6 | | 5 7 6 | 18 4 18 | 9 3 2 | |----------------------------+----------------------------+----------------------------| | 68 6-5 2 | 7 13568 13568 |*a15=4 b14 9 | | 9 3 *c57 | 15 2 4 | 6 b17 8 | | 678 1 4 | 568 9 568 | 25 27 3 | |----------------------------+----------------------------+----------------------------| | 16 2 35 | 4 13568 13568 | 138 9 7 | | 4 8 37 | 9 137 1237 | 123 6 5 | | 167 56 9 | 123568 135678 1235678 | 1238 128 4 | *--------------------------------------------------------------------------------------*

AXY-wing(17-5) with (17)r5c8, (57)r5c3 & (15=4)r4c7
[xy-wing(17-5) => r4c2<>5] = [4r4c7-(4=17)r45c8-(7=5)r5c3 => r4c2<>5] => r4c2<>5

Ted

by **Marty R.** » Thu Aug 15, 2013 3:59 pm

Code: Select all: +-----------+-----------------------+------------+ | 2 4 8 | 36 36 9 | 7 5 1 | | 3 9 1 | 25 57 257 | 48 48 6 | | 5 7 6 | 18 4 18 | 9 3 2 | +-----------+-----------------------+------------+ | 68 56 2 | 7 13568 13568 | 145 14 9 | | 9 3 57 | 15 2 4 | 6 17 8 | | 678 1 4 | 568 9 568 | 25 27 3 | +-----------+-----------------------+------------+ | 16 2 35 | 4 13568 13568 | 138 9 7 | | 4 8 37 | 9 137 1237 | 123 6 5 | | 167 56 9 | 123568 135678 1235678 | 1238 128 4 | +-----------+-----------------------+------------+

Play this puzzle online at the Daily Sudoku site

Chain--creates pincers and an invalidity

(5=6)r9c2-(6=5)r4c2-(5=7)r5c3-(714=5)r5c8,r4c87=>r4c2<>5

by **daj95376** » Thu Aug 15, 2013 5:23 pm

Marty R. wrote:(5=6)r9c2-(6=5)r4c2-(5=7)r5c3-(714=5)r5c8,r4c87=>r4c2<>5

You don't need the first SL in your chain.

by **7b53** » Fri Aug 16, 2013 4:55 am

Code: Select all: *--------------------------------------------------------------------------------------* | 2 4 8 | 36 36 9 | 7 5 1 | | 3 9 1 | 25 57 257 | 48 48 6 | | 5 7 6 | 18 4 18 | 9 3 2 | |----------------------------+----------------------------+----------------------------| | 68 56 2 | 7 13568 13568 | 145 14 9 | | 9 3 57 | 15 2 4 | 6 17* 8 | | 678 1 4 | 568 9 568 | 25 27 3 | |----------------------------+----------------------------+----------------------------| | 16 2 35 | 4 13568 13568 | 138 9 7 | | 4 8 37 | 9 137 1237 | 123 6 5 | | 167* 56 9 | 123568 135678 1235678 | 1238 128 4 | *--------------------------------------------------------------------------------------*

skipping few steps again... (7)r9c1 and (7)r5c8 = no solution
(16)r79c1 = (1)r5c8 - (1=45)r4c78 - (5=6)r4c2 => r46c1, r9c2 <> 6

Menneske 5869581