The New Sudoku Players' Forum

[S_Ehsan]

I'm trying to do these puzzles that i was given for homework but I cant seem to get it right. Im not very good at these nore have i ever tired them before..if sombody can help, that would be great!

its a 3 by 3 square with 9 squares all together
starting from the left:(I used l and --- to show where the new squares begin
puzzle 1:
8 7 ? l ? ? 6 l 3 ? 5
? 3 5 l ? ? ? l ? ? ?
? ? ? l ? 2 ? l 8 1 ?
- - - - - - - - -
9 ? ? l ? ? 3 l ? 8 ?
? ? ? l 7 ? 4 l ? ? ?
? 4 ? l 9 ? ? l ? ? 1
- - - - - - - - -
? 6 3 l ? 4 ? l ? ? ?
? ? ? l ? ? ? l 2 6 ?
5 ? 4 l 1 ? ? l ? 7 3

Puzzle 2:
2 ? ? l 7 ? 4 l ? ? 9
? ? ? l 1 ? 2 l ? ? ?
5 ? 8 l ? ? ? l 1 ? 2
- - - - - - - - - - - -
? ? 7 l 8 ? 5 l 4 ? ?
3 ? ? l ? ? ? l ? ? 1
? ? 1 l 3 ? 6 l 8 ? ?
- - - - - - - - - - - -
8 ? 2 l ? ? ? l 6 ? 4
? ? ? l 2 ? 8 l ? ? ?
1 ? ? l 6 ? 9 l ? ? 3

[Sped]

Code: Select all

 *-----------*
 |87.|..6|3.5|
 |.35|...|...|
 |...|.2.|81.|
 |---+---+---|
 |9..|..3|.8.|
 |...|7.4|...|
 |.4.|9..|..1|
 |---+---+---|
 |.63|.4.|...|
 |...|...|26.|
 |5.4|1..|.73|
 *-----------*


Puzzle 1:
A 1 can only go in one place in box 9 (the bottom right box) Hint: It can't go in column 9 because column 9 already has a 1. It can't go in column 8 because column 8 already has a 1. It can't go in row 9 because row 9 already has a 1.

Think about where you can place a 3 in box 2 (the top center box).
Then think about where a 3 can go in box 8 (the bottom center box)

Keep on like that. Puzzle 1 requires no advanced techniques. Just a little thinking.

Haven't checked the other 2

[TKiel]

Puzzle #2 requires nothing but naked and hidden singles, although there are a lot of naked pairs that could be use if one so desired.

Code: Select all

 *-----------*
 |2..|7.4|..9|
 |...|1.2|...|
 |5.8|...|1.2|
 |---+---+---|
 |..7|8.5|4..|
 |3..|...|..1|
 |..1|3.6|8..|
 |---+---+---|
 |8.2|...|6.4|
 |...|2.8|...|
 |1..|6.9|..3|
 *-----------*
 

Tracy

[S_Ehsan]

okay I tried it again and i got further then i did last time lol..but i did somthing wrong because there is one box left..can you tell me what i did wrong?

8 7 1 l 4 9 6 l 3 2 5
2 3 5 l 8 7 1 l 6 4 9
4 9 6 l 3 2 5 l 8 1 7
- - - - - - - - - - - --
9 5 2 l 6 1 3 l 4 8 6
3 1 9 l 7 8 4 l 5 9 2
6 4 8 l 9 5 2 l 7 3 1
----------------------
? 6 3 l 2 4 7 l 1 5 8
1 8 7 l 5 3 9 l 2 6 4
5 2 4 l 1 6 8 l 9 7 3

[Sped]

You have 2 6s in row 4 and 2 9s in row 5

Clear these cells and solve the puzzle:

r4c3, r4c9, r5c3, r5c9, r7c6, r8c3, r8c6

[S_Ehsan]

You have 2 6s in row 4 and 2 9s in row 5

Clear these cells and solve the puzzle:

r4c3, r4c9, r5c3, r5c9, r7c6, r8c3, r8c6

Thanks alot! I got it now