Originally posted by tomtom232
Thanks for that... I hadn't found 10.e5!
I confess that I wonder if I would have found that move over the board with the clock running....
Even so, the position is rather instructional, because if you look at it correctly, the pawn push almost suggests itself. In fact, I would be quite curious to set the position on a board and show it to some masters to see how long it takes them to find the move to e5.
Surely even a player of modest strength should notice the battery at d1 and d2, and the distant target at d8, and think about what would happen if the rest of the file could be cleared. That gets us as far as the first variation, 10. .... dxe5 11. Ne6, and the calculations are not difficult to work out that the line is undesirable for Black.
But if Black is not to drop a piece, the knight at f6 must go someplace, so maybe we try swinging it to d7 and have a look at that. Again, even a player of modest strength should be aware that the Black queen is already nearly trapped, and it only takes a couple of knight moves to do her in, and once again the calculations are not difficult.
Now we know we are on to something, we check other knight moves and they don't work either, and we quickly conclude that the little nudge to e5 lobs a pawn grenade right into the heart of the Black position.
And all of this comes about simply by looking at our chances and realizing that we just might have something cooking on the d-file. That's why I say this is an instructional position.