The New Sudoku Players' Forum

by **ArkieTech** » Sun Mar 17, 2013 2:43 am

Code: Select all: *-----------* |.1.|...|..2| |3.4|...|...| |.2.|.3.|5..| |---+---+---| |...|3..|..6| |..3|.4.|.7.| |...|..1|8..| |---+---+---| |..6|..8|7..| |...|.7.|.4.| |5..|2..|..1| *-----------*

by **Leren** » Sun Mar 17, 2013 3:29 am

Code: Select all: *--------------------------------------------------------------* | 6789 1 5789 | 45678 5689 45679 |b3469 c3689 2 | | 3 56789 4 | 15678 12568 25679 | 169 1689 789 | | 6789 2 789 | 14678 3 4679 | 5 1689 4789 | |--------------------+--------------------+--------------------| | 12478 45789 12578 | 3 2589 2579 |a1249 1259 6 | | 12689 5689 3 | 5689 4 2569 | 129 7 59 | | 24679 45679 2579 | 5679 2569 1 | 8 d2359 e359-4 | |--------------------+--------------------+--------------------| | 1249 349 6 | 1459 159 8 | 7 2359 359 | | 1289 389 1289 | 1569 7 3569 | 2369 4 3589 | | 5 34789 789 | 2 69 3469 | 369 3689 1 | *--------------------------------------------------------------*

l2-wing: -4 r4c7 = (4-3) r1c7 = r1c8 - r6c8 = r6c9 => -4 r6c9; lclste

Leren

by **pjb** » Sun Mar 17, 2013 4:03 am

A similar discontinuous loop:

(4) r1c7 - r3c9 = (4-3) r6c9 = r6c8 - r1c8 = r1c7 => r1c7 <> 4; lclste

Phil

by **daj95376** » Sun Mar 17, 2013 5:03 pm

I find the common cell, r5c7, to be interesting.

Code: Select all: +--------------------------------------------------------------------------------+ | 6789 1 5789 | 456789 5689 45679 | b3469 c3689 2 | | 3 56789 4 | 156789 125689 25679 | a169 1689 789 | | 6789 2 789 | 146789 3 4679 | 5 1689 4789 | |--------------------------+--------------------------+--------------------------| | 124789 45789 125789 | 3 2589 2579 | 4-129 d1259 6 | | 12689 5689 3 | 5689 4 2569 | a129d 7 d59 | | 24679 45679 2579 | 5679 2569 1 | 8 d2359 3459 | |--------------------------+--------------------------+--------------------------| | 1249 349 6 | 1459 159 8 | 7 2359 359 | | 1289 389 1289 | 1569 7 3569 | a2369 4 3589 | | 5 34789 789 | 2 69 3469 | a369 3689 1 | +--------------------------------------------------------------------------------+ # 183 eliminations remain (1269=3)r2589c7 - r1c7 = r1c8 - (3=1259)r46c8,r5c79 => r4c7<>129

by **pjb** » Sun Mar 17, 2013 10:47 pm

Another attack is the ALSs at r9c578 and r578c9, doubly linked by 3 and 8 => r236c9 <> 9, r6c9 <> 5, r9c236 <> 9, r9c6 <> 6
The new state is:

Code: Select all: 6789 1 5789 | 456789 5689 45679 | 3469 3689 2 3 56789 4 | 156789 125689 25679 | 169 1689 78 6789 2 789 | 146789 3 4679 | 5 1689 478 ---------------------+----------------------+--------------------- 124789 45789 12589 | 3 2589 2579 | 1249 1259 6 12689 5689 3 | 5689 4 2569 | 129 7 59 24679 45679 259 | 5679 2569 1 | 8 2359 34 ---------------------+----------------------+--------------------- 1249 349 6 | 1459 159 8 | 7 2359 359 1289 389 1289 | 1569 7 3569 | 2369 4 589 5 3478 78 | 2 69 34 | 369 3689 1

It still needs the ALSs at r6c9 and r24589c7, linked by 4 => r7c9 <> 3, lclste

Phil

by **Leren** » Mon Mar 18, 2013 2:36 am

Code: Select all: *--------------------------------------------------------------------------------* | a6789 1 a5789 |a456789 a5689 a45679 | 369-4 a3689 2 | | 3 56789 4 | 156789 125689 25679 | 169 1689 d789 | | 6789 2 789 | 16789-4 3 679-4 | 5 1689 d4789 | |--------------------------+--------------------------+--------------------------| | 124789 45789 125789 | 3 2589 2579 | 1249 1259 6 | | 12689 5689 3 | 5689 4 2569 | 129 7 d59 | | 24679 45679 2579 | 5679 2569 1 | 8 b2359 c3459 | |--------------------------+--------------------------+--------------------------| | 1249 349 6 | 1459 159 8 | 7 2359 d359 | | 1289 389 1289 | 1569 7 3569 | 2369 4 d3589 | | 5 34789 789 | 2 69 3469 | 369 3689 1 | *--------------------------------------------------------------------------------*

Conjugate linked ALSs: (4=3) r1c134568 - r6c8 = r6c9 -(3=4) r23578c9 => r1c7, r3c46 <> 4; lclste

Leren

Patterngame 37.17