Obregon,A - Mareco,S

Black rook on a8.
Black king on g8.
Black queen on b7.
Black pawn on c7.
Black bishop on e7.
Black pawn on f7.
Black pawn on g7.
Black pawn on h7.
Black knight on c6.
Black bishop on e6.
Black knight on f6.
Black pawn on b5.
Black pawn on e5.
White pawn on b4.
White pawn on e4.
White pawn on c3.
White bishop on d3.
White knight on f3.
White knight on d2.
White queen on e2.
White pawn on f2.
White pawn on g2.
White pawn on h2.
White bishop on c1.
White rook on e1.
White king on g1.