The New Sudoku Players' Forum

by **ArkieTech** » Sat Nov 24, 2012 8:00 am

Code: Select all: *-----------* |.7.|513|.2.| |.39|.7.|14.| |...|.4.|...| |---+---+---| |.9.|.5.|.1.| |.57|9.4|83.| |.4.|.8.|.7.| |---+---+---| |...|.2.|...| |.25|.9.|76.| |.6.|835|.9.| *-----------*

by **Leren** » Sat Nov 24, 2012 8:44 pm

Code: Select all: *--------------------------------------------------------------------------------* | 4 7 a68 | 5 1 3 | 69 2 689 | | 25-6 3 9 | 26 7 8 | 1 4 56 | | 25-6 18 126 | 26 4 9 | 3 58 7 | |--------------------------+--------------------------+--------------------------| |c28 9 b28 | 3 5 7 | 46 1 46 | | 1 5 7 | 9 6 4 | 8 3 2 | |e36 4 3-6 | 1 8 2 | 59 7 59 | |--------------------------+--------------------------+--------------------------| | 9 18 134 | 7 2 6 | 45 58 1345 | |d38 2 5 | 4 9 1 | 7 6 38 | | 7 6 14 | 8 3 5 | 2 9 14 | *--------------------------------------------------------------------------------*

XY Chain (6=8)r1c3 - (8=2)r4c3 - (2=8)r4c1 - (8=3)r8c1 - (3=6)r6c1 => r23c1,r6c3<6>

Leren

by **SudoQ** » Sat Nov 24, 2012 9:18 pm

How is 8 eliminated from r3c3 with basics?

Another solution:

Code: Select all: |----------------|----------|---------------| | 4 7 (68) | 5 1 3 | 69 2 689 | | 256 3 9 | 26 7 8 | 1 4 56 | | 2568 (18)(1268)| 26 4 9 | 3 58 7 | |----------------|----------|---------------| | 28 9 (28) | 3 5 7 | 46 1 46 | | 1 5 7 | 9 6 4 | 8 3 2 | | 36 4 3-6 | 1 8 2 | 59 7 59 | |----------------|----------|---------------| | 9 18 1348 | 7 2 6 | 45 58 13458 | | 38 2 5 | 4 9 1 | 7 6 38 | | 7 6 14 | 8 3 5 | 2 9 14 | |----------------|----------|---------------|

/SudoQ

by **ArkieTech** » Sat Nov 24, 2012 10:00 pm

another one

Code: Select all: *--------------------------------------------------------------------* | 4 7 a68 | 5 1 3 | 69 2 689 | | 25-6 3 9 | 26 7 8 | 1 4 56 | | 258-6 18 1268 | 26 4 9 | 3 58 7 | |----------------------+----------------------+----------------------| |c28 9 b28 | 3 5 7 | 46 1 46 | | 1 5 7 | 9 6 4 | 8 3 2 | |c36 4 3-6 | 1 8 2 | 59 7 59 | |----------------------+----------------------+----------------------| | 9 18 1348 | 7 2 6 | 45 58 13458 | |c38 2 5 | 4 9 1 | 7 6 38 | | 7 6 14 | 8 3 5 | 2 9 14 | *--------------------------------------------------------------------* als xy-wing (6=8)r1c3-(8=2)r4c3-(2r4c1=6r6c1)als:r648c1 => -6r23c1,r6c3; stte

by **SudoQ** » Sat Nov 24, 2012 10:32 pm

ArkieTech wrote:another one

The solution seems very similar to Lerens!

Unnecessary facts, basics is actually not needed:

Code: Select all: |----------------|----------|----------------| | 4 7 (68) | 5 1 3 | 69 2 689 | | 256 3 9 | 26 7 8 | 1 4 56 | | 2568 (18)(1268)| 26 4 9 | 3 58 7 | |----------------|----------|----------------| | 268 9 (268) | 3 5 7 | 46 1 46 | | 1 5 7 | 9 6 4 | 8 3 2 | | 36 4 3-6 | 1 8 2 | 569 7 569 | |----------------|----------|----------------| | 9 18 1348 | 7 2 6 | 45 58 13458 | | 38 2 5 | 4 9 1 | 7 6 38 | | 7 6 14 | 8 3 5 | 2 9 14 | |----------------|----------|----------------|

/SudoQ

by **Marty R.** » Sun Nov 25, 2012 12:36 am

A struggle solve, using an XY-Wing, X-Wing and BUG+3. :oops:

by **Leren** » Sun Nov 25, 2012 3:52 am

SudoQ wrote: How is 8 eliminated from r3c3 with basics?

Prior to the XY chain I found an XWing in 8s c28 r37 => r3c13, r7c39 <8>

Leren

Vanhegan fiendish November 23, 2012