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Puzzle 11/07/23: ~ XY (BBDB?)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sat Jul 23, 2011 10:00 pm    Post subject: Puzzle 11/07/23: ~ XY (BBDB?) Reply with quote

The presence of extraneous steps makes it a BBDB.

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

Play this puzzle online at the Daily Sudoku site
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Sat Jul 23, 2011 11:01 pm    Post subject: Reply with quote

I found an almost RP, but not an oddogan.

Quote:
RP(38)r6c9+r8c9+r9c8+r9c3=(6)r6c9-(6=8)r6c1; r6c3<>8
Type 1 UR(35)r23c26; r2c6=8
(38)r4c13=(6-3)r4c1=r8c1-(3=8)r8c9-(8=6)r3c9-r3c5=(6-8)r4c5; r4c5<>8


[Edit to replace last two steps with a single move.]

Quote:
RP(38)r6c9+r8c9+r9c8+r9c3=(6)r6c9-(6=8)r6c1; r6c3<>8
(68=1)r3c97-(1=3)r1c8-(3=8)r9c8-r9c3=r4c3-(8=6)r4c5; r3c5<>6

Ted
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Sun Jul 24, 2011 5:03 pm    Post subject: Reply with quote

Two wings - as Danny said avoiding numerous less helpful moves...
Quote:
w-wing(18) (1=8)r6c3 - r9c3=r9c8 - (8=1)r5c8 ; 6c7<>1
s-wing(16) (1)r3c7=r3c4 - (1=6)r1c4 - (6)r5c4=r5c7 ; r5c7<>1, r3c7<>6
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Marty R.



Joined: 12 Feb 2006
Posts: 5178
Location: Rochester, NY, USA

PostPosted: Tue Jul 26, 2011 4:45 am    Post subject: Reply with quote

W-Wing (18)
Type 1 UR (35)
M-Wing (68), flightless with transport + another transport
XY-Wing (183)
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