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Puzzle 11/02/24 Moderate/Difficult BBDB

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Feb 25, 2011 1:57 am    Post subject: Puzzle 11/02/24 Moderate/Difficult BBDB Reply with quote
Just when you think it'll be solved by singles, it turns on you!

Code:
 +-----------------------+
 | . . . | 4 . . | 6 8 7 |
 | . 2 . | . . 3 | 5 1 9 |
 | . . 9 | . . . | . 4 . |
 |-------+-------+-------|
 | 1 . . | 3 . . | 4 . . |
 | . . . | . 5 . | . . . |
 | . 5 . | . . 4 | . . 3 |
 |-------+-------+-------|
 | 6 7 . | 9 . . | 1 3 4 |
 | 3 9 5 | . . . | 7 . . |
 | 2 1 . | . . 7 | 9 . 8 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri Feb 25, 2011 8:40 am    Post subject: Reply with quote
Indeed! Felt sure there must be a quicker path - but other than 'almost' moves...
Quote:
kite(6) ; r4c5<>6
w-wing(78) ; r3c5<>7
BUG+1 ; r5c8<>67=9
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Feb 25, 2011 12:31 pm    Post subject: Reply with quote
Well, you sure didn't need several steps listed by my solver. _ Embarassed _
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Fri Feb 25, 2011 4:17 pm    Post subject: Reply with quote
After basics......

Code:
*-----------------------------------------------------------*
 | 5     3     1     | 4     9     2     | 6     8     7     |
 | 4     2     6-7   | 78    678   3     | 5     1     9     |
 | 78    68    9     | 5     167   16    | 3     4     2     |
 |-------------------+-------------------+-------------------|
 | 1    #68    2     | 3    #78(6) 689   | 4     679   5     |
 | 789   4     3     | 278   5     689   | 28    679   1     |
 | 789   5    #67    | 1278  1678  4     | 28    679   3     |
 |-------------------+-------------------+-------------------|
 | 6     7     8     | 9     2     5     | 1     3     4     |
 | 3     9     5     | 18    4     18    | 7     2     6     |
 | 2     1     4     | 6     3     7     | 9     5     8     |
 *-----------------------------------------------------------*

Flightless AXY-wing 6-78 vertex (68)r4c2 pincers (67)r6c3 & (78)r4c5 with fin (6)r4c5; r2c3<>7
If xy-wing is true plus transport: (7)r4c5-r23c5=(7)r2c4
If fin is true: (6)r4c5-als(6=78)r2c45

BUG+1 r5c8=9
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Feb 25, 2011 11:48 pm    Post subject: Reply with quote
I used my usual plethora of moves.

Type 4 UR
XY-Wing, flightless
XYZ-Wing
W-Wing + two transports
BUG+2
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