As seems to be the case almost every day recently, a single step sops me in my tracks. Once found, it allows me to begin running again. It's a shame you were in a rush, because this was rather satisfying without notation (91 = row 9 column 1): 91, 17, 34, 19, 67, 42 (the difficult step: hidden pair in row 9 leads to hidden pair in column 2), 73, 63 (partitioning of box 5), 33, 52 (using the hidden pairs), 45, 55, 51, 41, 56, 36 (pairs in row; one resolvable), 31, 84, 74, 96, 86, 95, 94, 71, 97, 79, 92, 81, 62, 64, 43, 53, 49, 44, 48, 77, 29, 14, 24, 18, 78, 39, 32, 25, 27, 89, 87, 28, 59, 58, 99, 13, 26, 16, 21, 12, 15.
Sudoku for beginners: the moment a 7 is placed in r1c7, a 5 must be in r1c9 and hence, also in r6c7. Good puzzle. A bit of a challenge, but very visible pairs and remote pairs resolve everything rather niely.
With permission, it strikes me that you deprive yourself of a lot of fun and satisfying aha's by moving to pencil marks so early in the game. Had you held out a couple of more minutes you'd have spotted the 39 pair in block 5, because the 1, 2 and 4 have to go elsewhere in column 5. Likewise, the 68 pair in row 9 signaled their presence as early as 6 minutes in. Pencil marks for this relatively easy level are just mechanical and require almost no grey matter.
Neill spotted a quadruple in the row, which allowed him to remove those candidates elsewhere along the row. However, he could have simply observed the carefully positioned 6s and 8s in box 8 and column 7, and the 6/8 pair in row 9 would have revealed itself to him.
Nice puzzle Thanks.
As seems to be the case almost every day recently, a single step sops me in my tracks. Once found, it allows me to begin running again. It's a shame you were in a rush, because this was rather satisfying without notation (91 = row 9 column 1):
91, 17, 34, 19, 67,
42 (the difficult step: hidden pair in row 9 leads to hidden pair in column 2),
73, 63 (partitioning of box 5),
33, 52 (using the hidden pairs),
45, 55, 51, 41, 56,
36 (pairs in row; one resolvable),
31, 84, 74, 96, 86,
95, 94, 71, 97, 79,
92, 81, 62, 64, 43,
53, 49, 44, 48, 77,
29, 14, 24, 18, 78,
39, 32, 25, 27, 89,
87, 28, 59, 58, 99,
13, 26, 16, 21, 12,
15.
Sudoku for beginners: the moment a 7 is placed in r1c7, a 5 must be in r1c9 and hence, also in r6c7. Good puzzle. A bit of a challenge, but very visible pairs and remote pairs resolve everything rather niely.
With permission, it strikes me that you deprive yourself of a lot of fun and satisfying aha's by moving to pencil marks so early in the game. Had you held out a couple of more minutes you'd have spotted the 39 pair in block 5, because the 1, 2 and 4 have to go elsewhere in column 5. Likewise, the 68 pair in row 9 signaled their presence as early as 6 minutes in.
Pencil marks for this relatively easy level are just mechanical and require almost no grey matter.
10:50 so the reason the the candidates for the 1, 3, 4, 9 were removed in r9 is because they were all tangled up together? how do you even see that
Neill spotted a quadruple in the row, which allowed him to remove those candidates elsewhere along the row. However, he could have simply observed the carefully positioned 6s and 8s in box 8 and column 7, and the 6/8 pair in row 9 would have revealed itself to him.
@@AnonimityAssuredah right I see it now! thank you!
NF