Chess Board
[ECO code C40]
TRANSPOSITION
LATVIAN COUNTER-GAMBIT to PHILIDOR'S DEF.
Black's P-Q3(d6) defended his endangered KP and freed his QB to defend his earlier countergambit KBP.
White transposes into a Counter- Attack line of Philidor's Defence by a Queen's Pawn to Q4(d4), planning QPxP to trade pawns and (perhaps) queens before winning Black's KP with (usually) advantage.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 P-KB4!?  (2.	Kt-KB3 P-Q3   )
 3. Kt-B3  P-Q3	    (3.	P-Q4   P-KB4?!)
 4. P-Q4	    (4.	Kt-B3	      )
Continue: Transpose or Undo or Jump or Clear