- Code: Select all
*-----------*
|...|.6.|3.2|
|.65|...|.1.|
|3..|...|4.5|
|---+---+---|
|..9|13.|6..|
|6..|5.8|..1|
|..7|.46|8..|
|---+---+---|
|2.4|...|..6|
|.1.|...|27.|
|9.6|.1.|...|
*-----------*
Play/Print this puzzle online
*-----------*
|...|.6.|3.2|
|.65|...|.1.|
|3..|...|4.5|
|---+---+---|
|..9|13.|6..|
|6..|5.8|..1|
|..7|.46|8..|
|---+---+---|
|2.4|...|..6|
|.1.|...|27.|
|9.6|.1.|...|
*-----------*
*--------------------------------------------------------------*
| 7 b489 1 | 489 6 5 | 3 Aa8-9a 2 |
| 48 6 5 | 23489 289 2349 | 79 1 789 |
| 3 c289 d28 | 789 789 1 | 4 6 5 |
|--------------------+--------------------+--------------------|
| 458 2458 9 | 1 3 27 | 6 245 47 |
| 6 234 e23 | 5 279 8 | 79 2349 1 |
| 1 235 7 | 29 4 6 | 8 2359 39 |
|--------------------+--------------------+--------------------|
| 2 3578 4 | 3789 5789 379 | 1 B389b 6 |
| 58 1 f38 | 6 589 D349 | 2 7 C3489c |
| 9 378 6 | 23478 1 2347 | 5 348 348 |
*--------------------------------------------------------------*
Forcing Chain Contradiction in Row 8 Digit 3:
9r1c8 - 9r1c2 = (9-2) r3c2 = 2r3c3 - (2=3) r5c3 - 3 r8c3;
9r1c8 - 9r7c8 = (9-4) r8c9 = (4-3) r8c6;
9r1c8 - 9r7c8 = (9-3) r8c9; => - 9 r1c8; lclste
*--------------------------------------------------------------------*
| 7 a489 1 | 489 6 5 | 3 8-9 2 |
|a48 6 5 | 23489 289 2349 | 79 1 789 |
| 3 289 b28 | 789 789 1 | 4 6 5 |
*----------------------+----------------------+----------------------|
| 458 2458 9 | 1 3 27 | 6 245 47 |
| 6 234 23 | 5 279 8 | 79 2349 1 |
| 1 235 7 |29 4 6 | 8 2359 39 |
*----------------------+----------------------+----------------------|
| 2 3578 4 | 3789 5789 379 | 1 f389 6 |
|d58 1 c38 | 6 d589 349 | 2 7 e3489 |
| 9 378 6 | 23478 1 2347 | 5 348 348 |
*--------------------------------------------------------------------*
JC Van Hay wrote: SF(9C6B39)-9r8c5
*-----------------------------------------------------------------------*
| 7 *489 1 |*489 6 5 | 3 *89 2 |
| 48 6 5 | 23489 289 2349 | 79 1 789 |
| 3 *289 28 |*789 *789 1 | 4 6 5 |
|-----------------------+-----------------------+-----------------------|
| 458 2458 9 | 1 3 27 | 6 245 47 |
| 6 234 23 | 5 *279 8 | 79 2349 1 |
| 1 235 7 |*29 4 6 | 8 2359 39 |
|-----------------------+-----------------------+-----------------------|
| 2 3578 4 |*3789 *5789 f379 | 1 *389 6 |
| 58 1 38 | 6 58-9 349 | 2 7 3489 |
| 9 378 6 | 23478 1 2347 | 5 348 348 |
*-----------------------------------------------------------------------*
*--------------------------------------------------------------------*
| 7 489 1 | 489 6 5 | 3 d89 2 |
| 48 6 5 | 23489 289 b2349 |c79 1 c789 |
| 3 289 28 | 789 789 1 | 4 6 5 |
|----------------------+----------------------+----------------------|
| 458 2458 9 | 1 3 27 | 6 245 47 |
| 6 234 23 | 5 279 8 | 79 2349 1 |
| 1 235 7 | 29 4 6 | 8 2359 39 |
|----------------------+----------------------+----------------------|
| 2 3578 4 | 3789 5789 a379 | 1 e389 6 |
| 58 1 38 | 6 58-9 a349 | 2 7 f3489 |
| 9 378 6 | 23478 1 2347 | 5 348 348 |
*--------------------------------------------------------------------*
9r78c6=r2c6-r2c79=r1c8-r7c8=9r8c9 => -9r8c5; lclste