The chess puzzle in Little Nightmares II might seem like a tricky one to solve. You encounter it during the school level, which is Chapter Two, and you must complete it to acquire a key to open a door downstairs.
First, ignore the chess set in the main room. Walk to your right, and you will see a projector screen with a massive eye drawn on it. Jump, grab the handle at the bottom and then let go to reveal the wall behind it.
There will be a chalk drawing replica of the chess set. You have to find and place the correct tops on each chess piece to activate the puzzle’s next phase.
Head right to a table underneath a window. Jump and grab the table ledge to haul yourself up. Take the queen top off the chess piece, drop down and carry it to the chess set. Put it on the ground for now.
Head back to the room’s entrance. You used a chess piece, with a rook top, to reach the door handle to enter the room. Grab the rook top, head back to the chess set, and place it on the top left chess piece. Climb up and leap to the table next to you. Pick up the top for the king chess piece and drop down.
Now you can complete the puzzle. Remove the rook top from the previous chess piece and place it on the far right one. Put the queen top on the top left chess piece and the king top on the piece next to the black king piece. A wall light to your right will flicker on.
Climb onto the rook piece and leap to the table to your right. Jump and grab the brass handle of the wall light to activate a secret switch. The dresser at the back will open to reveal a hidden room with the key. Grab the key and use it to open the door downstairs.