# B D A Mini-Sudoku Puzzle

```Mini-Sudoku Puzzle
Complete entries in this
chart so that letters A-F
appear without repetition
in each row, each column
and each 2  3 block
Standard Sudoku consists of
a 9  9 chart, but this mini
version is good for a quick fix
USA Today carries a daily
mini-Sudoku at its site:
http://puzzles.usatoday.com
Sudoku isn’t a math puzzle:
We can use the letters A-F,
or any other six symbols,
instead of the numbers 1-6
Lecture 7
B
D
F
A
C A
E C
D
F
F
C
Handout
Sudoku Puzzle: Easy Example
Complete entries in this
chart so that numbers 1-9
appear without repetition
in each row, each column
and each 3  3 block
Many newspapers carry these
puzzles; there are also many
collections in book form
Sudoku puzzles of varying
difficulties (easy, medium,
hard, evil) are available at
http://www.websudoku.com
and several other Web sites,
such as USA Today’s site
http://puzzles.usatoday.com
Lecture 7
5
6
4
7
9
3
6
7
4
5
7
5
9
1
1
9
8
6
8
4
2
2
8
5
6
3
9
3
4
5
7
6
Handout
Sudoku Puzzle: Hard Example
Complete entries in this
chart so that numbers 1-9
appear without repetition
in each row, each column
and each 3  3 block
6
4
Hard puzzles may have
handles or starting points
(5 in the top left block or 9 in
center and lower right blocks)
Lecture 7
5
1
3
Hard puzzles typically have
fewer entries supplied, with
each row, column, or block
containing only a few entries
8
9
5
6
4
1
2
5
8
1
5
3
7
9
1
9
2
9
4
6
Handout
Job-Shop Scheduling
8
8
Sample schedule
S 6
t
a
4
f Ta1
f
2
0
0
Ta2
Tc1
Td2
Td1
Tb2
Tb1
2
S 6
t
a 4
f
f
2
4
6
8
10
12
Tb3
14
Time
0
Job Task Machine Time Staff
Ja Ta1 M1 2
3
Ja Ta2 M3 6
2
Jb Tb1 M2 5
2
Jb Tb2 M1 3
3
Jb Tb3 M2 3
2
Jc Tc1 M3 4
2
Jd Td1 M1 5
4
Jd Td2 M2 2
1
M1
M2
Lecture 7
M3
0
2
4
6
8
10
12
14
Time
0
2
4
6
8
10
12
14
Time
8
S 6
t
a 4
f
f
2
0