In the Sämisch Variation...
		
		
	 
	
		
			White moves this pawn forward
		
		
	 
	
		
			In order to create this pawn chain
		
		
	 
	
		
			Solidify his centre
		
		
	 
	
		
			And prevent Black from using the g4-square
		
		
	 
	
		
			He wants to castle Queenside (0-0-0)
		
		
	 
	
		
			And attack on the kingside by advancing these pawns
		
		
	 
	
		
			Black wants to castle Kingside
		
		
	 
	
		
			Undermine the centre with these pawn advances
		
		
	 
	
		
			Or move this pawn in order to challenge White’s Queenside