## Robert's puzzles 2020-01-01

Post puzzles for others to solve here.

### Robert's puzzles 2020-01-01

Hi all and Happy New Year 2020 !
This is my first grid of the year, not too difficult.
..31......9..7..8...8..2..51..5.......2.3.4.......7..89..4..8...3..6..1......57..
Good sudoku.
Robert
puzzle: Show
Mauriès Robert

Posts: 222
Joined: 07 November 2019
Location: France

### Re: Robert's puzzles 2020-01-01

Code: Select all
` *-------------------------------------------------------------------------* |  2467   2467    3      |  1     5      8     |  269     24679   24679   | |  2456   9       1456   |  36    7      346   |  1236    8       12346   | |  467    1467    8      |  369   49     2     |  136     3467    5       | |------------------------+---------------------+--------------------------| |  1      4678    4679   |  5     2489   46    |  2369    23679   23679   | |  567    5678    2      |  689   3      6-1   |  4      b5679   d1679    | |  3      456     4569   |  269   1249   7     | c12569  b2569    8       | |------------------------+---------------------+--------------------------| |  9      12567   1567   |  4     12    a13    |  8      a356    a36      | |  8      3       45     |  7     6      9     |  25      1       24      | |  246    1246    146    |  238   128    5     |  7       3469    3469    | *-------------------------------------------------------------------------*`

(1=365)r7c689 - r56c8 = (5-1)r6c7 = r5c9 => -1r5c6, solves with xyz-wing
eleven

Posts: 2238
Joined: 10 February 2008

### Re: Robert's puzzles 2020-01-01

Hi,
Here's my two-step resolution with TDP:
1) P'(1r7c6) : -1r7c6->(3r7c6->6r7c9)->5r7c8->5r6c7->1r5c9 => -1r5c6 => 23 placements.
2) P'(5r6c8) : -5r8c6->6r6c8->4r9c8->2r8c9->5r8c7 => -5r6c7 => stte.
Robert
Mauriès Robert

Posts: 222
Joined: 07 November 2019
Location: France