The New Sudoku Players' Forum

by **ArkieTech** » Sat Jul 21, 2018 12:20 pm

Code: Select all: *-----------* |.2.|...|.4.| |1.3|...|5.9| |.4.|1.7|.3.| |---+---+---| |..6|.7.|2..| |...|6.4|...| |..4|.5.|7..| |---+---+---| |.9.|7.3|.1.| |3.1|...|4.7| |.8.|...|.9.| *-----------*

by **SCLT** » Sat Jul 21, 2018 12:34 pm

Code: Select all: *---------------------------------------------------------* | 7 2 9 | d35 6-3 56 | 1 4 8 | | 1 6 3 | 4 28 28 | 5 7 9 | | 58 4 58 | 1 9 7 | 6 3 2 | *------------------+---------------------+----------------| | 589 13 6 | 89-3 7 189 | 2 58 4 | | 2 7 58 | 6 a13 4 | 9 58 13 | | 89 13 4 | 289 5 289 | 7 6 13 | *------------------+---------------------+----------------| | 6 9 2 | 7 4 3 | 8 1 5 | | 3 5 1 | 89 68 689 | 4 2 7 | | 4 8 7 | c25 b12 125 | 3 9 6 | *---------------------------------------------------------*

XY-Chain: (3=1)r5c5 - (1=2)r9c5 - (2=5)r9c4 - (5=3)r1c4 => -3 r1c5,r4c4; stte

by **SteveG48** » Sat Jul 21, 2018 2:48 pm

Code: Select all: *--------------------------------------------------* | 7 2 9 | 3-5 b36 c56 | 1 4 8 | | 1 6 3 | 4 28 28 | 5 7 9 | | 58 4 58 | 1 9 7 | 6 3 2 | *----------------+----------------+----------------| | 589 13 6 | 389 7 189 | 2 58 4 | | 2 7 58 | 6 b13 4 | 9 58 13 | | 89 13 4 | 289 5 289 | 7 6 13 | *----------------+----------------+----------------| | 6 9 2 | 7 4 3 | 8 1 5 | | 3 5 1 | 89 68 689 | 4 2 7 | | 4 8 7 |a25 a12 12-5 | 3 9 6 | *--------------------------------------------------*

(5=12)r9c45 - (1=36)r15c5 - (6=5)r1c6 => -5 r1c4,r9c6 ; stte

by **Cenoman** » Sat Jul 21, 2018 3:02 pm

I like this two uniqueness steps:

Code: Select all: +------------------+-------------------+-----------------+ | 7 2 9 | 35 36 56 | 1 4 8 | | 1 6 3 | 4 28 28 | 5 7 9 | | 58* 4 58* | 1 9 7 | 6 3 2 | +------------------+-------------------+-----------------+ | 58+9* 13 6 | 389 7 189 | 2 58* 4 | | 2 7 58* | 6 13 4 | 9 58* 13 | | 89 13 4 | 289 5 289 | 7 6 13 | +------------------+-------------------+-----------------+ | 6 9 2 | 7 4 3 | 8 1 5 | | 3 5 1 | 89 68 689 | 4 2 7 | | 4 8 7 | 25 12 125 | 3 9 6 | +------------------+-------------------+-----------------+

DP(58)r1c13,b4p16,r45c8 using unique internal +9r4c1; 7 placements +basics

Code: Select all: +-----------------+------------------+-----------------+ | 7 2 9 | 35 36 56 | 1 4 8 | | 1 6 3 | 4 28 c28 | 5 7 9 | | 5 4 8 | 1 9 7 | 6 3 2 | +-----------------+------------------+-----------------+ | 9 13 6 | 38 7 18 | 2 5 4 | | 2 7 5 | 6 13 4 | 9 8 13 | | 8 13 4 | 29 5 9-2 | 7 6 13 | +-----------------+------------------+-----------------+ | 6 9 2 | 7 4 3 | 8 1 5 | | 3 5 1 | 89 68 b69+8 | 4 2 7 | | 4 8 7 | 25 12 a15+2 | 3 9 6 | +-----------------+------------------+-----------------+

BUG+2 (2)r9c6==(8)r8c6 - (8=2)r2c6 => -2 r6c6; ste

Failed to find the BUG+7 (missing chain from 8r4c1 - ???)

by **SteveG48** » Sat Jul 21, 2018 3:32 pm

Nice one, Cenoman. I was hoping for a one-stepper using that DP, but I couldn't find one.

by **Ngisa** » Sat Jul 21, 2018 4:28 pm

Code: Select all: +-------------------+-----------------------+-----------------+ | 7 2 9 |e35 36 56 | 1 4 8 | | 1 6 3 | 4 28 28 | 5 7 9 | | 58 4 58 | 1 9 7 | 6 3 2 | +-------------------+-----------------------+-----------------+ | 589 a13 6 | 89-3 7 b189 | 2 58 4 | | 258 7 58 | 6 1238 4 | 9 58 13 | | 289 13 4 | 289 5 289 | 7 6 13 | +-------------------+-----------------------+-----------------+ | 6 9 2 | 7 4 3 | 8 1 5 | | 3 5 1 | 89 68 689 | 4 2 7 | | 4 8 7 |d25 12 c125 | 3 9 6 | +-------------------+-----------------------+-----------------+

(3=1)r4c2 - r4c6 = (1-5)r9c6 = r9c4 - (5=3)r1c4 => - 3r4c4; stte

Clement

July 21, 2018