How a chess game is drawn due to the stalemate rule

A chess game is drawn if the player in turn to move has no legal move but is not in check. The diagrams below, both White to move, show two stalemate positions.

Many game between novice players have ended up with  stalemates similar to this position, where a careless queen placement has resulted in the checkless entrapment of the king. 

Black's pawn, assisted by the king, has been stopped on its journey to promotion at the d1 square. White's king blocks the path, and has no way to move.

Although White has several pieces on the board, none of them are able to move, so the game  is drawn by stalemate.

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