Sudoku with chess queen rules

This is a unique sudoku. With Rules :

• Common sudoku rules apply.
• Numbers 1,2,3 have an additional rule, they are also chess queens.
• If all others numbers removed, the 1s do not attack each other horizontally, vertically or diagonally.
• Same rules as number 1 also apply to numbers 2 and 3.
• There is only 1 unique solution.

• @JaapScherphuis : a bit typo, but not fatal. I will soon replace the image soon. – Jamal Senjaya Dec 1 '17 at 9:19
• I have solved this suduko it has more than one solution will you explain the rules of chess to the suduko a little bit more – rudra Dec 1 '17 at 9:35
• Nice innovation. Good puzzle – Dr Xorile Dec 1 '17 at 9:36
• @rudra really? I want to see your answer. I have checked it by using computer, it only have 1 solution. Maybe I make mistake in my code. – Jamal Senjaya Dec 1 '17 at 9:39

721 839 456
864 512 937
359 467 812

612 958 743
497 326 581
538 741 629

176 284 395
283 695 174
945 173 268

I sure hope I didn't make any silly mistakes like last time...

The way I solved it:

I managed to first place all threes. From there, I could place all the ones. Adding the middle left 9, central 6 and top right 5 using sudoku rules, I could place all twos. Then, all that was left was a regular sudoku.