I have always struggled with this and I believe there is some rule that someone defined at some point, but I am not sure who (Maybe it was Steinitz).
When and why should I move my pawns in front of my castled or non-castled King?
First, I would assume it matters if the King is castled or not?
I will state my logic behind this and someone with more knowledge can let me know if it is flawed:
- I usually move a pawn so my Knight or some other piece does not get pinned.
- I usually move a pawn to prevent my opponent from bringing his bishop down to pin my knight or some other piece to my king.
- I usually move a pawn so the bishop or some other piece(maybe queen can't put King in check)
- I usually don't like to do this because it weakens the king/queen-side depending on where I want to castle.
Let's look at some examples:
In the first scenario, I am thinking black might move 4...Bb4
, which would put my King in check, so to prevent this, I will play 4. a3
. Is this the proper move or is there a better move?
[fen ""]
1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. a3 Bb4
In my second scenario, let's assume, my Knight was already on c3
, so to prevent black from 4...Bb4
, I would again play 4. a3
, to prevent the future pin if I wanted to move the d2
pawn.
[fen ""]
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 Bb4
In my third scenario, let's assume I moved by d2
pawn, so black could check or pin my knight with ...Bb4
, so to prevent black from 4...Bb4
, I would again play 4. a3
, to prevent the future pin if I wanted to move the d2
pawn.
[fen ""]
1. d4 d5 2. Nf3 Nc6 3. Nc3 e6 4. a3 Bb4
Let's assume that black does succeed in checking my King or pinning my knight to my King, if my King is in check, is it better to do c3
or Bd2
. If my Knight is pinning, is it better to do a3
to try and force the opponent to either exchange or move his bishop or Bd2
in the event if he takes my Knight, I will just recapture with my Bishop.
All of the above assume my King is not castled, but what if it was, my assumption is that I would not want to move any pawns in front of the castled king unless necessary, but I am not sure of when these times would apply.
a3