Long Moscow Variation

2/17/2012 – White is threatening a little something on h7. Now the sequence 23...Ne2++ 24.Kh2 Bg1+ 25.Kh1 Ng3+ ultimately yields Black ... A)... a material advantage; B)... a material disadvantage; C)... neither nor (equality). Extra question: Why does 23...Nf5+ 24.Kh2 Kg7 or 23...Nf3+ 24.Kh1 Kg7 fail? ChessBase Magazine, larger diagram and solution.

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