The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |...|1..|...|
 |..2|..3|..4|
 |.5.|.6.|.2.|
 |---+---+---|
 |2..|4..|7..|
 |..1|..7|..2|
 |.8.|.9.|.5.|
 |---+---+---|
 |...|5..|...|
 |..4|..6|..7|
 |.9.|.8.|.1.|
 *-----------*


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[tlanglet]

Code after basics:

Code: Select all

*-----------------------------------------------------------------------------*
 | 346789  3467    36789   | 1       2457    24589   | 35689   36789   35689   |
 | 16789   167     2       | 789     57      3       | 15689   6789    4       |
 | 134789  5       3789    | 789     6       489     | 1389    2       1389    |
 |-------------------------+-------------------------+-------------------------|
 | 2       36      59      | 4       135     158     | 7       3689    13689   |
 | 59      346     1       | 368     35      7       | 34689   34689   2       |
 | 3467    8       367     | 236     9       12      | 1346    5       136     |
 |-------------------------+-------------------------+-------------------------|
 | 13678   12367   3678    | 5       12347   1249    | 234689  34689   3689    |
 | 1358    123     4       | 239     123     6       | 23589   389     7       |
 | 3567    9       3567    | 237     8       24      | 23456   1       356     |
 *-----------------------------------------------------------------------------*


1: swordfish(4)r369c167 => r1c16,r5c7,r7c67<4>
2: swordfish(7)r369c134 => r1c13,r2c14,r7c13<7>
3: ANP(89=7)r23c4-r12c5=(7-4)r7c5=r9c6-(4=89)r3c6|r2c4 => r1c6<89>
4: (5=2)r1c6-(2=1)r6c6-(1=35)r45c5 => r12c5,r4c6<5>

[ArkieTech]

Code: Select all

 *-----------------------------------------------------------------------------*
 | 346789  3467    36789   | 1      c2457   d24589   | 35689   36789   35689   |
 | 16789   167     2       | 789     57      3       | 15689   6789    4       |
 | 134789  5       3789    | 789     6       489     | 1389    2       1389    |
 |-------------------------+-------------------------+-------------------------|
 | 2       36      59      | 4       135     158     | 7       3689    13689   |
 | 59      346     1       | 368     35      7       | 34689   34689   2       |
 | 3467    8       367     | 236     9       1-2     | 1346    5       136     |
 |-------------------------+-------------------------+-------------------------|
 | 13678   12367   3678    | 5      b12347   149-2   | 234689  34689   3689    |
 | 1358    123     4       | 239     123     6       | 23589   389     7       |
 | 3567    9       3567    | 237     8      a24      | 23456   1       356     |
 *-----------------------------------------------------------------------------*
m-wing
(2=4)r9c6-r7c5=(4-2)r1c5=2r1c6 => -2r67c6


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[tlanglet]

Very nice Dan

[Leren]

1: swordfish (4) as above
2: swordfish (7) as above
3: swordfish (5) r258c157 => r1c57,r4c5,r9c17 <7>
4: sue de coq: 24589r13c6 124r69c6 5789r23c4,r2c5 => r1c5<7>,r4c6<1>,r7c6<12>

Leren

[tlanglet]

1: swordfish (4) as above
2: swordfish (7) as above
3: swordfish (5) r258c157 => r1c57,r4c5,r9c17 <7>
4: sue de coq: 24589r13c6 124r69c6 5789r23c4,r2c5 => r1c5<7>,r4c6<1>,r7c6<12>

Leren

Great find Leren I enjoy looking for SdCs but never got around to it on this puzzle.

Ted

[Marty R.]

I find a swordfish every three years and I find two in this puzzle. After playing them and another step, I found the M-Wing, so I did the puzzle again to see if that would do it and the answer was yes.

[Leren]

Another interesting move in this puzzle is two 2 String Kites (2) and (4) both on r1c5 & r9c7 => r1c5<7> r9c7<36>

Leren

[daj95376]

_

FWIW: The M-Wing is an M-Ring.

[ArkieTech]

_

FWIW: The M-Wing is an M-Ring.

Danny,

Help! what makes it an m-ring? Both pinchers in the same column?

(2=4)r9c6-r7c5=(4-2)r1c5=2r1c6 => -2r67c6

[daj95376]

Help! what makes it an m-ring? Both pinchers in the same column?

(2=4)r9c6-r7c5=(4-2)r1c5=2r1c6 => -2r67c6

Both pincers in the same house/unit. The first M-Ring_B has them in the same column, [c6], and the second M-Ring_B has them in the same box, [b8].

Code: Select all

 after swordfish   (maybe extraneous)
 +--------------------------------------------------------------------------------+
 |  3689    3467    3689    |  1       247     2589    |  3689    36789   35689   |
 |  1689    167     2       |  89      57      3       |  15689   6789    4       |
 |  134789  5       3789    |  789     6       489     |  1389    2       1389    |
 |--------------------------+--------------------------+--------------------------|
 |  2       36      59      |  4       13      158     |  7       3689    13689   |
 |  59      346     1       |  368     35      7       |  3689    34689   2       |
 |  3467    8       367     |  236     9       12      |  1346    5       136     |
 |--------------------------+--------------------------+--------------------------|
 |  1368    12367   368     |  5       12347   129     |  23689   34689   3689    |
 |  1358    123     4       |  239     123     6       |  23589   389     7       |
 |  367     9       3567    |  237     8       24      |  2346    1       356     |
 +--------------------------------------------------------------------------------+
 # 149 eliminations remain

 M-Ring  B (2=4)r9c6 - r7c5  = (4-2)r1c5 = (2)r1c6  - loop  =>  r67c6<>2; r1c5<>7
 M-Ring  B (2=4)r9c6 - r3c6  = (4-2)r1c5 = (2)r78c5 - loop  =>  r89c4,r7c6<>2; r1c5<>7
 M-Ring  C (2=4)r9c6 - r7c5  = (4-2)r1c5 = (2)r78c5 - loop  =>  r89c4,r7c6<>2; r1c5<>7
 M-Ring  D (2=4)r9c6 - r3c6  = (4-2)r1c5 = (2)r1c6  - loop  =>  r67c6<>2; r1c5<>7


[ArkieTech]

Both pincers in the same house/unit. The first M-Ring_B has them in the same column, [c6], and the second M-Ring_B has them in the same box

Thanks,

It is always a good day when you learn something.