Why is this a strong move?

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Avatar of csal

I was analysing a game recently, when a move was recommended as the 'best move' that I couldn't understand. It's Neg5 on the below board. I couldn't see why that would be a strong move, but followed it through to see where it went. Black then plays ...h6 and the next recommended move for white is Nxe6 followed by Qxe6+ for black. At this point white is down material but the computer calculated a clear advantage for white. I played on from there, making what seemed the obvious moves for either side, trying to find how this eventually pays off for white, until eventually I came to the next image.

At this point (below), I am stumped. The computer still seems to find that white has the advantage, but I have no idea why. What could white do in this position? Or, have I misunderstood what the bar at the top represents? Even if that is the case, can anyone see why Neg5 followed by Nxe6 in the first image would be strong move?

Avatar of csal

Further to this I have just noticed that the second image as the exact same advantage (+2.18). I'm pretty sure the bar fluctuated as I played through the 'best moves,' but I wonder if my internet lagged and the calculations were just off or something. Even so, any help with the first image would be appreciated!

Avatar of csal

Ah ok, that explains the second position. Any ideas on why Neg5 and then taking the e pawn in the first position is good? I can only think it gives a good position that justifies the loss of material, but I can't find any tactical opportunities when I play it through.

Avatar of csal

cheers, must be about getting the queen out to give check on h5. That's all I can think of