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Tough Sudoku for 12/August/2012


Choose a number, and place it in the grid above.

  1 2 3 4 5 6 7 8 9
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Submitted by: sudoku lover

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Interesting photo.
(Surprisingly, I don't think I've ever come across the word 'barrage' before...)
12/Aug/12 12:23 AM
#1. LC and LS up to UP36
#2. Chain[12] : If c1=6 [and b4<>9], bc2=4, d2=9=e9, b5=9=i1, h35=48 and e3=3=h6, h4=5; column h is devoid of 9 => 6c4=9b4 :=> -6b4; UP81
12/Aug/12 2:08 AM
12/Aug/12 4:26 AM
Hi JC, you could manage without '[and b4<>9]', if you include in your chain, after e9=9,'a9=6=b4', with the same result.

Regards, Alfred.
12/Aug/12 8:49 AM
I had to look it up!

bar┬Ěrage 1. n. An artificial obstruction, such as a dam or irrigation channel, built in a watercourse to increase its depth or to divert its flow.

I knew only another meaning:
a line or barrier of exploding artillery shells, created by the co-ordinated aiming of a large number of guns firing continuously.
12/Aug/12 2:25 PM
Hi Bud, I just posted a reply to your comments of yesterday. Regards, JC.
12/Aug/12 7:35 PM
Hi Alfred,

I hope you are recovering well!

Thanks for your suggestion. However, in such a case, the length of the chain is increased to 13 :(
Reviewing the chain and leaving it as it is, I manage to reduce the length to 11 by replacing the 589 in column h by the cells More...
12/Aug/12 7:36 PM
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