Help counting unhidden rows that match match 2 criteria. Sumproduct / Subtotal i think

Hello clever people

I need help.

I need to count the unhidden rows that meet two criteria

In the very basic attachment I want to count the number of unhidden rows within A1 : B20 that have CHANGE and SOLO on the same row.

I know there will be some Sumproduct and Subtotal stuff going on but this is to much trail & error for me to put together.

Thanks in advance for your help