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What would be your exact continuation after Nxc2 (whole move order please)?

Ok, let's try this.
White, bishop to b5, check
Black knight must defend, from b4 to c6
White bishop b5 takes knight c6
Black pawn b7 takes bishop c6
White queen takes pawn c6, check mate - after brief black queen intervention

That right?

Alternatively
Bishop c6-b5 check
Knight x c2
Castle x c2 check
Bishop f8-c5
Castle x c5 checkmate, again after brief queen intervention

  1. Bb5+ Nxc2
  2. Rxc2+ Bc5
  3. Rxc5+ Qc7
  4. Rxc7+ Kb8

How exactly do you checkmate now? :)

Rc8 check
Kc8
Ra1 to c1 checkmate

That right?

!Rc8+ with mate in 1 to follow.