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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Mar 04, 2011 11:17 pm Post subject: Puzzle 11/03/04 Difficult |
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My last two puzzles in this set are being posted today.
| Code: | +-----------------------+
| 4 . 6 | . . . | . . 5 |
| . . . | 5 6 . | . . 2 |
| 5 . 2 | 7 . 8 | 6 1 4 |
|-------+-------+-------|
| . 5 8 | 3 . 9 | . . . |
| . 4 . | . . . | . 3 . |
| . . 3 | 2 . . | 1 . . |
|-------+-------+-------|
| . . 4 | . . 2 | . . . |
| . . 9 | . 5 . | . 4 . |
| 1 6 5 | . . . | . . 9 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat Mar 05, 2011 10:25 am Post subject: |
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Short xy .. for two steps
| Quote: | xy-chain ; (9=1)r1c4 - (1=3)r1c6 - (3=7)r9c6 - (7=8)r9c8 - (8=9)r2c8 ; r1c8<>9
BUG+2[(8)r1c7=(3)r1c2] - (3=8)r2c1 ; r2c7<>8 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Mar 05, 2011 2:05 pm Post subject: |
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I used three fun steps.......
ADP(138)r78c149 Internal sis: r78c1=7, r7c4=9, r8c4=6; r4c9<>6
(7)r78c1-(7=6)r4c1
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(9)r7c4-(9=1)r1c4-(1=3)r1c6-(3=7)r9c6-(7=6)r6c6-r5c4=(6)r5c9
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(6)r8c4-r5c4=(6)r5c9
Flightless xy-wing(1-39) vertex (19)r7c4, pseudocell (39)r1c46 plus transport; r7c2<>3
(3)r3c2=(3)r3c5-(3=1)r1c6-r1c4=r7c4-(1=3)r7c9
short xy-chain: r1c8<>9
(9=1)r1c4-(1=3)r1c6-(3=7)r9c6-(7=8)r9c8-(8=9)r2c8
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Mar 06, 2011 2:41 am Post subject: |
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XYZ-Wing (378)
DP (38-18-13); all possibilities solve box 5
W-Wing (38), flightless with transport; r1c7<>3
AIC; r7c5<>8 |
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