very hard one

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very hard one

Postby yessam » Fri Feb 10, 2006 10:26 am

can somone help with the next step here,i am stuck on this


7 45 26 1 26 35 34 8 9
3 1 58 4 9 58 7 6 2
26 48 9 7 268 2368 34 1 5

68 7 68 9 5 4 2 3 1
4 2 3 6 1 7 9 5 8
5 9 1 28 3 28 6 4 7

1 3 278 258 4 289 58 79 6
9 6 4 58 7 1 58 2 3
28 58 2578 3 268 2689 1 79 4
Last edited by yessam on Fri Feb 10, 2006 7:12 am, edited 4 times in total.
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Postby Wolfgang » Fri Feb 10, 2006 10:44 am

An x-wing in 8 should help you.
Please send your candidate list as Code (just press the "Code" button before and after the list).
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Hope this helps - from a newbie

Postby palmbay » Sun Feb 12, 2006 7:12 pm

Yessam,
1. Look at box 2 - Locked Candidates (5) in C6 Rows 1&2 means exclusion of 5's in box 8 C6 rows 7&9

2. Again Locked candidates (5) in Row 9 Cols 2&3 means excluding 5 from R3C7.

3. Naked triple in box 1 - 4,5 5,8 & 4,8 means excluding all 5's and 8's from R3C1 + R1C3.

4. Naked pair on Row 1 (2,6) means excluding 2+6 from R1C6

5. X-Wing on 8's R3C2 + R3C5, R9C2 + R9C5 means excluding 8's on R3C6, R9C1, R9C3, R9C6.

6. This leaves a naked 2 @ R1C9 and the rest is simple naked singles.

Hope this helps

Palmbay
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Postby yessam » Mon Feb 13, 2006 5:35 am

Thanks that was usefulnow I understand x wing concept!
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