Book completed: The Big Sleep

From Chapter 24 of Raymond Chandler's The Big Sleep:

I went over to a floor lamp and pulled the switch, went back to put off the ceiling light, and went across the room again to the chessboard on a card table under the lamp.  There was a problem laid out on the board, a six-mover.  I couldn't solve it, like a lot of my problems.  I reached down and moved a knight, then pulled my hat and coat off and threw them somewhere.  All this time the soft giggling went on from the bed, that sound that made me think of rats behind a wainscoting in an old house.

And a bit later...

I looked down at the chessboard.  The move with the knight was wrong.  I put it back where I had moved it from.  Knights had no meaning in this game.  It wasn't a game for knights.