The New Sudoku Players' Forum

by **ArkieTech** » Mon Oct 23, 2017 4:27 am

Code: Select all: *-----------* |.1.|8.7|...| |3..|..4|9.5| |...|6..|.1.| |---+---+---| |..8|...|.32| |2..|...|..7| |49.|...|8..| |---+---+---| |.4.|..5|...| |8.5|9..|..6| |...|7.1|.4.| *-----------*

by **pjb** » Mon Oct 23, 2017 5:04 am

Code: Select all: 569 1 2469 | 8 359 7 | 23 26 34 3 678 67 | 1 2 4 | 9 678 5 579 2578 2479 | 6 359 39 | 237 1 348 ------------------------+----------------------+--------------------- b1567 a567 8 | 45 b179 c69 | 46 3 2 2 356 136 | 45 13 8 | 46 9 7 4 9 367 | 23 37 d236 | 8 5 1 ------------------------+----------------------+--------------------- 1679 4 13679 | 23 68 5 | 237 278 389 8 f3-7 5 | 9 4 e23 | 1 g27 6 69 236 2369 | 7 68 1 | 5 4 389

(7)r4c2 = HP(17-9)r4c15 = (9-6)r4c6 = (6-2)r6c6 = (2-3)r8c6 = (3-7)r8c2 = r8c8 => -7 r8c2; stte

Phil

by **Leren** » Mon Oct 23, 2017 5:45 am

Code: Select all: *------------------------------------------------* | 569 1 2469 | 8 359 7 | 23 26 34 | | 3 678 67 | 1 2 4 | 9 678 5 | | 579 2578 2479 | 6 359 39 | 237 1 348 | |------------------+---------------+-------------| |f1567 e567 8 | 45 f179 f69 | 46 3 2 | | 2 356 136 | 45 13 8 | 46 9 7 | | 4 9 367 |a23 37 g36-2 | 8 5 1 | |------------------+---------------+-------------| | 1679 4 13679 |b23 68 5 | 237 278 389 | | 8 d37 5 | 9 4 c23 | 1 27 6 | | 69 236 2369 | 7 68 1 | 5 4 389 | *------------------------------------------------*

(2=3) r6c4 - (3=2) r7c4 - (2=3) r8c6 - (3=7) r8c2 - r4c2 = HT (179-6) r4c156 = (6) r6c6 => - 2 r6c6; stte

Leren

by **eleven** » Mon Oct 23, 2017 6:32 am

Code: Select all: *-----------------------------------------------------------------* | 569 1 2469 | 8 359 7 | 23 26 34 | | 3 678 67 | 1 2 4 | 9 678 5 | | 579 2578 2479 | 6 359 a39 | 237 1 348 | |------------------------+-------------------+--------------------| | 1567 b567 8 | b45 179 a69 | b46 3 2 | | 2 356 136 | 45 13 8 | 46 9 7 | | 4 9 367 | 23 37 236 | 8 5 1 | |------------------------+-------------------+--------------------| | 1679 4 13679 | 23 68 5 | 237 278 389 | | 8 c37 5 | 9 4 2-3 | 1 27 6 | | 69 236 2369 | 7 68 1 | 5 4 389 | *-----------------------------------------------------------------*

(3=6)r34c6-(6=7)r4c247-(7=3)r48c2 => -3r8c6, stte

by **Leren** » Mon Oct 23, 2017 6:37 am

eleven wrote : (3=6)r34c6-(6=7)r4c247-(7=3)r48c2 => -3r8c6, stte

Quite a clever chain - the 7 in r4c2 is both True and False at the same time

.

Leren

by **Cenoman** » Mon Oct 23, 2017 8:39 pm

Code: Select all: +------------------------+-------------------+--------------------+ | 569 1 2469 | 8 359 7 | 23 26 34 | | 3 678 67 | 1 2 4 | 9 678 5 | | 579 2578 2479 | 6 359 39 | 237 1 348 | +------------------------+-------------------+--------------------+ | 1567 a567* 8 | 45* 179 69 | 46* 3 2 | | 2 356* A136 | 45* 13 8 | 46* 9 7 | | 4 9 B367 | 23 37 C236 | 8 5 1 | +------------------------+-------------------+--------------------+ | 1679 4 13679 | 23 68 5 | 237 278 389 | | 8 b37 5 | 9 4 D2-3 | 1 27 6 | | 69 236 2369 | 7 68 1 | 5 4 389 | +------------------------+-------------------+--------------------+

DP(456)r45c247 using internals and externals:
(7)r4c2 - (7=3)r8c2
(6)r5c3 - r6c3 = (6-2)r6c6 = (2)r8c6
=> -3 r8c6; stte

Cenoman

October 23, 2017