###### n = 2 ##########
puzz21 = [
    3 0 4 0
    0 1 0 2
    0 4 0 3
    2 0 1 0
];

puzz22 = [
    0 1 3 0
    0 0 0 0
    0 0 0 0
    3 4 2 1
];

puzz23 = [
    0 3 0 1
    0 0 2 0
    0 0 3 0
    0 4 0 2
];

###### n = 3 ###########
puzz1 = [
9  3  0  0  0  0  0  4  0
0  0  0  0  4  2  0  9  0
8  0  0  1  9  6  7  0  0
0  0  0  4  7  0  0  0  0
0  2  0  0  0  0  0  6  0
0  0  0  0  2  3  0  0  0
0  0  8  5  3  1  0  0  2
0  9  0  2  8  0  0  0  0
0  7  0  0  0  0  0  5  3
];

puzz2 = [
0  0  9  0  1  0  0  6  0
0  0  0  0  6  7  0  0  3
0  3  5  0  0  0  0  0  0
3  0  0  0  0  2  0  0  0
5  1  7  0  0  0  2  3  4
0  0  0  3  0  0  0  0  7
0  0  0  0  0  0  9  1  0
1  0  0  6  8  0  0  0  0
0  7  0  0  3  0  5  0  0
];

puzz3 = [
0  3  7  8  6  0  0  4  0
0  0  6  0  0  7  0  0  0
0  2  0  0  3  0  0  0  6
0  8  0  2  0  0  0  0  0
9  0  0  0  0  0  0  0  1
0  0  0  0  0  6  0  9  0
5  0  0  0  7  0  0  3  0
0  0  0  3  0  0  8  0  0
0  1  0  0  8  4  2  6  0
];

#### n = 4 #####
puzz41 = [
    0 16 0 0 0 0 0 0 0 0 0 0 0 0 0 1
    10 0 0 14 2 0 5 7 15 0 0 11 0 0 13 9
    0 0 0 11 0 0 0 0 13 0 0 12 0 0 0 0
    0 0 3 0 0 10 14 0 0 0 0 0 0 0 5 0
    0 0 0 7 0 5 0 15 0 6 13 10 14 0 0 3
    9 11 0 0 3 0 12 1 0 14 0 16 7 6 0 8
    4 0 0 0 0 6 0 0 12 0 1 0 0 0 0 15
    0 0 12 0 0 0 0 11 0 0 0 0 0 0 0 16
    3 0 0 9 1 0 11 0 0 0 0 0 16 10 0 0
    0 0 0 0 7 4 0 9 0 2 0 5 0 0 0 11
    0 1 0 0 0 16 2 0 0 0 8 0 15 0 7 0
    0 0 0 0 0 0 0 8 3 0 9 0 4 0 14 0
    0 0 0 0 15 0 0 0 2 0 0 13 0 0 1 0
    1 0 0 5 0 8 0 0 0 10 0 14 11 0 0 12
    16 15 0 8 0 0 0 14 0 1 12 4 10 0 3 0
    0 0 11 0 5 0 0 0 0 0 0 15 0 8 9 2
];
