In this position that arose from the Stonewall Dutch Defense, the White Queen is functioning successfully as a Blockader. Black’s debilitating melanpenia or incurable weakness on the dark squares leaves him scrambling to find serviceable moves.
Black undertook the usual insipid plan of liberating his bad c8 bishop by Bd7, e8, f7, and g6. This gave White ample time to strengthen his grip on the black squares AND also the opportunity to attack the DARK h8 square by doubling his PIGS(rooks) on the h file.
Black’s d5 pawn and Jimmy Carter have something in common. The have lust in their hearts. The White queen blockading at d4 mechanically prevents the piece activating pawn sacrifice d4. The d5 pawn lusts to expand(move forward) for an awakening of the men in the rear(Rooks, Bishop and Queen) and well, we all know about the former president’s lust.
Finally this chess position, is a nice example of John Watson’s rule independence. Many neophyte chess players are taught that Queens are ineffective Blockaders since they can not hop like knights. This position is certainly an exception to that rule. A better formulation of that rule of thumb might be “Knights are usually better blockaders than Queens”