check 3*3 sqrs

Not only rows and columns must contain the numbers 1 to 9. The nine 3x3 matrices also must contain number 1 to 9. The top left hand 3 x 3 is:

1 2 3
2 3 1
3 1 2

This matrix should not contain equal numbers. Check the sudoku rules on the given site.

Why this sudoku is not vaild?
[ [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 2, 3, 1, 5, 6, 4, 8, 9, 7 ],
[ 3, 1, 2, 6, 4, 5, 9, 7, 8 ],
[ 4, 5, 6, 7, 8, 9, 1, 2, 3 ],
[ 5, 6, 4, 8, 9, 7, 2, 3, 1 ],
[ 6, 4, 5, 9, 7, 8, 3, 1, 2 ],
[ 7, 8, 9, 1, 2, 3, 4, 5, 6 ],
[ 8, 9, 7, 2, 3, 1, 5, 6, 4 ],
[ 9, 7, 8, 3, 1, 2, 6, 4, 5 ] ]