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Normal Topic Elementary Tactics (Read 2215 times)
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Re: Elementary Tactics
Reply #1 - 04/05/15 at 07:13:25
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There's a very simple rule of thumb for this: White is threatening Black's e-pawn when he defends his (Nc3/d3/Re1).

The exception to when Black can ignore the threat is when he responds with ...Bc5 and can meet Bxc6 dxc6 Nxe5 with ...Qd4. There are also d3/Qe2 Berlin lines where you can recapture ...bxc6 and meet Nxe5 with ...d5 successfully, e.g. with 4.d3 Bc5 5.c3 0-0 6.Bxc6 bxc6 7.Nxe5 d5.

  

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Elementary Tactics
04/04/15 at 04:43:56
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There are some openings where Black can play his third and fourth moves in any order. So there's the very common sequence 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0. It isn't possible to win a pawn by 4. Bxc6 dxc6 5. Nxe5 because the reply 5. .. Qd4 hits both the pawn on e4 and the Knight on e5 and if 6. Nf3, then 6. .. Qxe4 is check.

Contrast this with the sequence 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 a6 . In this position 5. Bxc6 dxc6 6. Nxe5 just wins a pawn, since after 6. .. Qd4 7. Nf3 Qxe4 8. Re1 would win the queen. Other similar tactics are available against other attempts to regain the material so Black has just lost a pawn for little compensation.

Opening knowledge is sometimes equated to knowing what to do at move 15 in the Marshall. Arguably it's also knowing the main variations and tactics in the first few moves and when it's safe to vary the order.
  
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