Minggu, 07 November 2021

Chess Analysis Move by Move: 4.Ba4 (Main Line Ruy Lopez)

 4.Ba4 (C70: Main Line Ruy Lopez)

Why play Main Line Ruy Lopez 4.Ba4

  • White maintain attack and possibility pinning Black Knight against Black King, if Black move d pawn.
  • Retreating White Bishop into Bc4, Bd3 and Be2 is inferior moves, because White Bishop can go into that squares earlier without going into Ruy Lopez.
  • Retreating White Bishop into Bc4, Bd3 and Be1 give Black free a6 move.
Black Responses
  • By seeing White last move (4.Ba4), Black assume that White didn't want to exchange Bishop with Knight immediately.
  • So, Black delayed b5 move and try to attack undefended White Pawn on e4 with his/her Knight.
  • By playing 4...Nf6, Black also developing g1 Knight into best starting development square.
  • By playing 4...Nf6, Black  moving piece which required to be moved, in order to castle on the kingside.
4...d6 (C71: Modern Steinitz Defense)
Why played Modern Steinitz Defense?
  • This move is improvement to Old Steinitz Defense.
  • By playing Modern Steinitz Defense, Black plan is similar to Old Steinitz Defense (protect e pawn and open way for c8 bishop move out from back rank).
  • The advantage playing Modern Steinitz Defense then playing Old Steinitz Defense is Black ready any time to break pin using b pawn.
  • The chance of breaking pin any time, give Black more freedom in choosing response against White.
4...Bc4 (C70: Ruy Lopez, Classical Defense Deferred)
Analyze Ruy Lopez, Classical Defense Deferred
  • Black try to attack White Pawn on f2.
  • By playing 4...Bc4, Black developing Bishop to c5 square while at the same time facilitate castle on the kingside.
  • This move named Classical Defense Deferred, because this position similar to Ruy Lopez Classical Defense.
  • The difference, Black delayed (deferred) playing Bc4 in third move.
  • Black play a6 on third move and Bc4 on fourth move.
4...Nd4 (C70: Ruy Lopez, Bird Defense Deferred)
  • This move name Ruy Lopez Bird Defense Deferred, because this position similar to Ruy Lopez Bird Defense.
  • The difference, Black delayed (deferred) playing Nd4 in third move.
  • Because White Bishop no longer in b5 square, so Black Knight only attack White Knight on f3 square and c pawn.
  • The drawback of this move is potentially make double pawn on d file, if White play 5.Nxd4 and Black response with 5...exd4. 
4...b5 (C70: Ruy Lopez, Caro Variation)
Reason to play Ruy Lopez Caro Variation
  • Black hunting White Bishop with b pawn.
  • It better to delay b5 move, because by using Morphy Defense (3...a6) Black now can assume that White didn't want to play Ruy Lopez Exchange Variation.
  • It better moving piece which help king to castle on the kingside (moving f1 Bishop or g1 Knight) or protect e pawn with d6.
  

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