The black king is placed as shown in the picture below. You are playing as white and given four rooks. You need to place one Rook at a time and ensure the black king will always be in check state. After four moves you need to guarantee the checkmate position.
How will you do this?
This is a variation of Which Tank Will Fill First Brain Teaser but in this puzzle connection between tank-5 and tank-2 is closed so water will go into tank-5 from tank-1 but not go to tank-2. Therefore tank-5 will be filled first.