So now the issue is closed.

I fixed it. This issue can be closed.

Hi Splendid, thanks for your compliment and effort on solving this kata! I really like your solution, it is short with nice optimizations. I start to wonder if my recommendation to do the 4x4 first really helps, because the 4x4 can be solved by brute force while the 6x6 requires a different strategy. What do you think?

Thanks for suggestion. Yes, "object[]" doesn't look nice, I will modify it later to Tuple or simple strings.

Thanks, fixed now.

I believe he's refering to C#

What do you mean by "using System"? I can't find that terminology elsewhere.