Chess Board
[ECO codes A04 / 41] Do not scroll the screen..! Move Move Move Here Move Here Move Here
RETI / ZUKERTORT OPG. - Wade Def.
(towards Nimzowitsch Def.)
Black developed his queen's bishop to KKt5(g4) for a half pin on White's KKt that cut its support for White's QP, enabling 3..P-K4.
White advances his King's Pawn to the centre, increasing the pin on his KKt but freeing his KB and threatening both 4.P-K5 and 4.P-Q5.
     White   Black
 1.  Kt-KB3  P-Q3
 2.  P-Q4    B-Kt5
 3.  P-K4	   Equiv. W3,W2 route
BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves King's Pawn:

P-K4 (e5) or P-K3 (e6) ?

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