dailysudoku.com

[David Bryant]

I thought this puzzle was even tougher than the usual "very hard" puzzle on this site. Great puzzle, Sam! dcb

[jess]

it is really hard and I don't know. Who knows the answer and paste it here?

[jess]

i suck here

x79 x4x 263
xx2 7x9 x4x
5xx xxx 879

xxx x7x 3xx
9xx 8x6 xx7
7x8 x5x xxx

xx7 xxx xx2
21x 4xx 7xx
69x x27 x3x

who can help me to solve it?

[amy]

[jess]

amy,

can u show me how to solve it?

[geoff h]

Hi Jess,

Firstly, a bit of house-keeping. You can quickly place Nr 8 in r9c9 as this is only possibility for 8 in Row 9. Also, I assume you have identified there is a pair of 1,5 in Row 2 ( r2c7 and r2c9 ). Also, there is a pair of 1,5 in Column 4 ( r1c4 and r9c4 ).

Now, for some hints;

1. Nr 8 then can quickly be placed in r4c8 as this is only possibility for 8 in Row 4. Also, Nr 9 can be placed in r4c4 as only possibility for 9 in Row 4.

2. There is a triplet of 1,4,5 in Column 7 ( r2c7, r5c7 and r9c7 ). This means you can eliminate all other 1,4,5s in Column 7 and means you have a pair of 6,9 in r6c7 and r7c7.

3. You can then place Nr 4 in r9c7 as this is the only possibility for Nr 4 in Box Nr 9. You can then easily complete Row 9 and solve the puzzle from there.

Hope this helps.

Cheers.

[BOB W]

Geoff H - Thanks for the tips, BUT - I don't understand why r9c7 must be a 4. Could you explain, please? Great hobby!!! Thanks

Love Sydney - visited in Nov 1999.

[geoff h]

Hi Bob,

Yes, Sydney sure is a great place to live!!

As you probably know, Box Nr 9 is the bottom box on the far right ( cell numbers r7c7 - r9c9). When considering Box Nr 9, the only place where you can place a 4 is in r9c7. You can't place it in r7c8 or r8c8 because there is already a 4 in r2c8. You can't place it in r8c9 because there is already a 4 in r8c4. And finally, you can't place it in r7c7 because we have already eliminated Nrs 1,4,5 from that cell due to the triplet of 1,4,5 I mentioned in previous answer.

Cheers.

[David Bryant]

[jambon_vn]

[geoff h]

After posting a 4 at r9c7, you can do the following steps;

1. Place Nr 5 at r9c3 because only possibilities in that cell are 4 or 5.
2. Then place Nr 1 at r9c4 because only possibilities in that cell are 1 or 5.
3. Then place Nr 3 at r8c3 because only possibilities in that cell are 3 or 5.
This then also gives you a pair of 4,8 in Row 7.

4. The the final major clue to solving this puzzle is to consider Row 5 and its interaction with Box Nr 4. Nr 4 has to appear in either r5c2 or r5c3 as these are the only places it can go in Row 5. Therefore, you can DELETE ALL OTHER 4s IN BOX NO.4. This then means you can place Nr 1 in r4c1 because the only possibilities for that cell are 1 and 4.

After that, it's plain sailing - I should leave the rest of the puzzle for you to solve yourself.

Cheers.

[jess]

Hi, geoff

Thanks for explaining and I finially solve it since I can put the Nr 8. So thanks alot!!

[BOB W]

Thank you Geoff and David for your kind help.

[Guest]

I actually found this one to be quite easy, I am new to the forum, and have only been doing the Sudoku puzzles for about 2 weeks, if that, but I sat down and did this puzzle in maybe 15-20min. Im not sure if that is good or not but that was the best time I have had on a very hard puzzle.
I would post how I did it but I am at school and need to get to my next class, maybe next time. And Hello everyone.

[Sahara]

Many thanks for geoff h explanation.

[Guest]

[Guest]

375 xxx xx6
x1x x62 8xx
xxx xxx 5x1

xxx x4x 76x
xxx 8x6 xxx
x68 x1x xxx

2x1 xxx xxx
xx3 15x x8x
9xx xxx 153

can anyone help my solve that one??

[Louise56]

[Guest]