The New Sudoku Players' Forum

by **SteveG48** » Fri Dec 03, 2021 2:39 pm

Code: Select all: *-----------* |..3|...|.7.| |8..|.5.|..4| |..4|...|2..| |---+---+---| |...|..7|.1.| |.18|..6|.45| |.9.|3..|...| |---+---+---| |..9|2..|1..| |5..|.3.|..9| |.3.|...|7..| *-----------*

by **Cenoman** » Fri Dec 03, 2021 5:30 pm

Two steps:

Code: Select all: +---------------------+-------------------------+--------------------+ | 19 6 3 | 48 489 2 | 5 7 18 | | 8 27 27 | 1 5 39 | 6 39 4 | | 19 5 4 | 67 67 389 | 2 389 138 | +---------------------+-------------------------+--------------------+ | 3 24* 256* | 458 48 7 | 9 1 26* | | 7 1 8 | 9 2 6 | 3 4 5 | | 246* 9 256 | 3 14 145 | 8 26 7 | +---------------------+-------------------------+--------------------+ | 46 478 9 | 2 4678 458 | 1 3568 368 | | 5 278 1267 | 678 3 18 | 4 268 9 | | 246* 3 126 | 4568 14689 14589 | 7 2568 68-2 | +---------------------+-------------------------+--------------------+

1. Kite (2)r4c9 = r4c23 - r6c1 = r9c1 => -2 r9c9; 13 placements & ls

Code: Select all: +------------------+------------------+-------------------+ | 19 6 3 | 48 49 2 | 5 7 18 | | 8 27* 27* | 1 5 39 | 6 39 4 | | 19 5 4 | 7 6 389 | 2 389 138 | +------------------+------------------+-------------------+ | 3 4 6 | 5 8 7 | 9 1 2 | | 7 1 8 | 9 2 6 | 3 4 5 | | 2 9 5 | 3 14 14 | 8 6 7 | +------------------+------------------+-------------------+ | 46 8 9 | 2 7 45 | 1 35 36 | | 5 27* 127* | 6 3 18 | 4 28 9 | | 46 3 12 | 48 19 159 | 7 25 68 | +------------------+------------------+-------------------+

2. UR(27)r28c23 =>+1r8c3; ste

by **jco** » Fri Dec 03, 2021 6:08 pm

After basics. Also two steps:

Code: Select all: .--------------------------------------------------------------------. | 19 6 3 | 48 489 2 | 5 7 18 | | 8 27 27 | 1 5 39 | 6 39 4 | | 19 5 4 | 67 67 389 | 2 389 138 | |----------------------+----------------------+----------------------| | 3 4-2 56-2 | 458 48 7 | 9 1 *26 | | 7 1 8 | 9 2 6 | 3 4 5 | |*246 9 256 | 3 14 145 | 8 6-2 7 | |----------------------+----------------------+----------------------| | 46 478 9 | 2 4678 458 | 1 3568 368 | | 5 278 1267 | 678 3 18 | 4 268 9 | |*246 3 126 | 4568 14689 14589 | 7 2568 *268 | '--------------------------------------------------------------------'

1. Skyscraper (2)r69c1, r49c9 => -2 r4c23, -2 r7c8 [13 placements & ls]

Code: Select all: .--------------------------------------------------------------------. | 19 6 3 | 48 49 2 | 5 7 18 | | 8 27 27 | 1 5 39 | 6 39 4 | | 19 5 4 | 7 6 389 | 2 389 138 | |----------------------+----------------------+----------------------| | 3 4 6 | 5 8 7 | 9 1 2 | | 7 1 8 | 9 2 6 | 3 4 5 | | 2 9 5 | 3 14 a14 | 8 6 7 | |----------------------+----------------------+----------------------| | 46 8 9 | 2 7 5-4 | 1 35 36 | | 5 27 127 | 6 3 b18 | 4 28 9 | | 46 3 12 |c48 19 159 | 7 25 68 | '--------------------------------------------------------------------'

2. XY-Wing (4=1)r6c6 - (1=8)r8c6 - (8=4)r9c4 => -4 r7c6; ste

Edit: corrected the grid

Steve Stumble 12-3-2021