White moonbus (1850), Black HikaruShindo (1570), notes by moonbus
1... e5 2. Ng1f3 Nb8c6 3. Bf1b5 Nc6d4
Ruy Lopez, Bird Defense. After the game, HikaruShindo advised me that he had been following a prepared analysis. See the following link: http://danamackenzie.com/about/chess/blog-archive/bird1/
4. Nf3xd4 exd4
Black has lost a tempo, not only moving his N twice, but his e-pawn twice as well. Moreover, Black's P on d4 is an easy target for White and will be hard for Black to defend; if Black should try to hold it with ... c5, he will fatally weaken his white squares and d7 pawn.
White cannot allow ... d3, which would disrupt the pawn structure.
Publicly announcing his intention... Black has already lost a tempo, and now he looses another by fianchettoing his KB . This is too slow, too passive, does nothing to hinder White's development, and makes it easy for White to anticipate his plan.
6. O-O Bf8g7 7. Bb5c4
Since Black has wasted two tempi, White can afford to give one back, targeting f7, the Achilles Heel in the Black camp.
Publicly announcing his plan to advance d7-d5 and try to block the B on c4.
Holding d5, further attacking f7. Black's position is already getting difficult.
Seems a solid developing move, re-inforcing d5, and preparing to castle. But ...
... Black will not have time for ... d7-d5 and castling. The displacement of Black's e-pawn to the d-file allows White a tactical shot here.