The New Sudoku Players' Forum

by **P.O.** » Wed Sep 14, 2022 5:13 am

a new attempt at making puzzles, this one looks presentable

Code: Select all: . . . . . . 4 6 . . . . 6 . 1 . . 2 . . 7 . . 8 . . 9 . . . . . . . . 4 6 1 . . . 4 . 7 . 5 . 3 . . . 2 . . . . 1 2 . . . . . . . . . . 7 8 3 . . 9 . . 1 . . . 5 ......46....6.1..2..7..8..9........461...4.7.5.3...2....12..........783..9..1...5 ( n1r8c9 n2r9c8 n4r7c8 n4r6c2 n6r3c2 n9r7c7 n1r1c1 ) intersection: ((((7 0) (6 4 5) (1 7 8 9)) ((7 0) (6 5 5) (6 7 8 9)))) 1 2358 2589 3579 23579 2359 4 6 378 3489 358 4589 6 34579 1 357 58 2 234 6 7 345 2345 8 135 15 9 2789 278 289 13589 235689 23569 1356 1589 4 6 1 289 3589 23589 4 35 7 38 5 4 3 1789 6789 69 2 189 68 378 3578 1 2 3568 356 9 4 67 24 25 2456 459 4569 7 8 3 1 3478 9 468 348 1 36 67 2 5

by **eleven** » Wed Sep 14, 2022 2:51 pm

Code: Select all: +-------------------------+--------------------------+-------------------------+ | 1 2358 2589 | 3579 23579 2359 | 4 6 #378 | | 3489 358 4589 | 6 #34579 1 |#357 58 2 | | 234 6 7 | 345 2345 8 | 135 15 9 | +-------------------------+--------------------------+-------------------------+ | 2789 278 289 | 13589 235689 23569 | 1356 1589 4 | | 6 1 289 | 3589 23589 4 | 35 7 38 | | 5 4 3 |b#1789 #6789 d69 | 2 a18-9 d68 | +-------------------------+--------------------------+-------------------------+ | 378 3578 1 | 2 3568 356 | 9 4 c#67 | | 24 25 2456 | 459 4569 7 | 8 3 1 | | 3478 9 468 | 348 1 36 | 67 2 5 | +-------------------------+--------------------------+-------------------------+

3 SL7: 7r6c4 = r6c5 - r2c5 = r2c7 - r1c9 = r7c9
1r6c8 = (1-7)r6c4 == (7-6)r7c9 = 69r6c6 => -9r6c8

Code: Select all: +-------------------+-------------------+-------------------+ | 1 358 58 | 3579 3579 2 | 4 6 #378 | | 9 358 4 | 6 b#357 1 |#37 58 2 | | 2 6 7 | 35 4 8 | 13 15 9 | +-------------------+-------------------+-------------------+ | 78 278 28 | 135 356 5-6 | 1356 9 4 | | 6 1 9 | 358 2 4 | 35 7 38 | | 5 4 3 | 178 a67 9 | 2 18 68 | +-------------------+-------------------+-------------------+ | 37 57 1 | 2 8 d356 | 9 4 c#67 | | 4 25 256 | 59 59-6 7 | 8 3 1 | | 378 9 68 | 4 1 36 | 67 2 5 | +-------------------+-------------------+-------------------+

2 SL7: (6=7)r6c5 - r2c5 == (7-6)r7c9 = 6r7c6 => -6r4c6,r8c5

Code: Select all: *-------------------------------------------------------* | 1 38 5 | 379 379 2 | 4 6 378 | | 9 a38 4 | 6 357 1 | 7-3 b58 2 | | 2 6 7 | 35 4 8 | b13 b15 9 | |---------------+-------------------+-------------------| | 8 7 2 | 13 36 5 | 136 9 4 | | 6 1 9 | 38 2 4 | 5 7 38 | | 5 4 3 | 178 67 9 | 2 18 68 | |---------------+-------------------+-------------------| | 37 5 1 | 2 8 36 | 9 4 67 | | 4 2 6 | 59 59 7 | 8 3 1 | | 37 9 8 | 4 1 36 | 67 2 5 | *-------------------------------------------------------*

(3=8)r2c2 - (8=513)b3p578 => -3r3c7, ste

by **Cenoman** » Wed Sep 14, 2022 8:08 pm

Code: Select all: +-----------------------+---------------------------+----------------------+ | 1 2358 2589 | c3579 23579 2359 | 4 6 d378 | | 3489 358 4589 | 6 34579 1 | 357 58 2 | | 234 6 7 | 345 2345 8 | 135 15 9 | +-----------------------+---------------------------+----------------------+ | 2789 278 289 | 1358-9 23568-9 2356-9 | 1356 1589 4 | | 6 1 289 | 358-9 2358-9 4 | 35 7 d38 | | 5 4 3 | b178-9 a6789 ea69 | 2 18-9 da68 | +-----------------------+---------------------------+----------------------+ | 378 3578 1 | 2 3568 356 | 9 4 67 | | 24 25 2456 | 459 4569 7 | 8 3 1 | | 3478 9 468 | 348 1 36 | 67 2 5 | +-----------------------+---------------------------+----------------------+

1. (9=687)r6c569 - r6c4 = r1c4 - (7=386)r156c9 - (6=9)r6c6 => +9 r6c56; lcls, 12 placements

Code: Select all: +--------------------+----------------------+--------------------+ | 1 358 58 | 3579 3579 2 | 4 6 378 | | 9 wAa358 4 | 6 357 1 | b37 x58 2 | | 2 6 7 | 35 4 8 | 13 15 9 | +--------------------+----------------------+--------------------+ | 78 278 28 | 135 356 D56 | 135-6 9 4 | | 6 1 9 | 358 2 4 | 35 7 38 | | 5 4 3 | 178 67 9 | 2 y18 z68 | +--------------------+----------------------+--------------------+ | 37 B57 1 | 2 8 C356 | 9 4 67 | | 4 25 256 | 59 569 7 | 8 3 1 | | 378 9 68 | 4 1 36 | c67 2 5 | +--------------------+----------------------+--------------------+

2. Kraken cell (358)r2c2
(3)r2c2 - (3=7)r2c7 - (7=6)r9c7
(5)r2c2 - r7c2 = r7c6 - (5=6)r4c6
(8)r2c2 - r2c8 = r6c8 - (8=6)r6c9
=> -6 r4c7; ste

by **P.O.** » Thu Sep 15, 2022 6:02 pm

thank you for your answers, my solution:

Code: Select all: 3b3p347 => r6c5 <> 6 r1c9=3 - r5c9{n3 n8} - r6c9{n8 n6} r2c7=3 - 15r3c78 - r2c8{n5 n8} - r2c2{n38 n5} - c3n5{r12 r8} - r8n6{c3 c5) r3c7=3 - c7n1{r3 r4} - c4n1{r4 r6} - r6n7{c4 c5} 378r1c9 => r6c8 <> 9 r1c9=3 - r5c9{n3 n8} - r6c9{n8 n6} - r6c6{n6 n9} r1c9=7 - c4n7{r1 r6} - r6n1{c4 c8} r1c9=8 - r6c9{n8 n6} - r6c6{n6 n9} ste.

Puzzle 55