Sergash: Capablanca was 12 years old at the time of this game. Little is known about Fiol, except that he was a Cuban player.<3.d2-d4 e5xd4! 4.Nf3xd4 Bf8-c5> In a previous game, Capablanca had played the Ruy Lopez: 3.Bf1-b5 Ng8-f6 4.0-0 Nf6xe4 5.d2-d4 Bf8-e7?! 6.d4-d5 Ne4-d6! 7.Bb5-a4?! e5-e4! 8.d5xc6! e4xf3 9.c6xd7+ Bc8xd7 10.Ba4xd7+ Qd8xd7 11.Qd1xf3 0-0 12.Nb1-c3 = Capablanca vs E Corzo, 1901, 1-0.
<5.Nd4xc6> The main line goes: 5.Nd4-b3! Bc5-b6 6.Nb1-c3 ⩲ as in Blackburne vs G MacDonnell, 1876, 1-0.
<5...b7xc6?! 6.Bf1-d3> Main line: 5...Qd8-f6! 6.Qd1-f3! b7xc6! = Alberto Foguelman vs. Julio Mazzoleni, Buenos Aires LR (Argentina) 1959, round 6, 1-0.
<6...Qd8-f6? 7.0-0! Ng8-e7 ±> This is a serious mistake, as the timing that was present on the previous move is not there anymore! Better is 6...d7-d6 7.0-0 Ng8-f6 ⩲ a position which occurred in J W Baird vs A Ettlinger, 1893, draw.
<8.Qd1-e2? => 8.Nb1-c3! Ne7-g6! 9.Kg1-h1! ± Hartmut Schmid vs. Heinz Matthai, Kiel Open (West Germany) 1965, round 11, 1-0.
<8...d7-d6 ⩲> Better is 8...Ne7-g6! (Ja Sewina (1800) vs. M. Szymanwska (1800), Poland Team Ch. U18 1996 in Augustow, 1-0) 9.Nb1-c3N! ⩲ Stockfish 13 - 64 bits BMI2.
<9.Nb1-c3 0-0 10.Kg1-h1> Immediately 9.Kg1-h1! ⩲ Jukka Taivainen (2265) vs. Olavi Niemi, Jyväskylä Open (Finland) 2003, round 1, 1-0.
<10...Ne7-g6?! 11.f2-f4! Qf6-h4! ±/ ⩲> 10...Qf6-h4! 11.Bc1-e2 (or 11.f2-f4 Bc8-g4! 12.Qe2-e1 Qh4xe1▢ 13.Rf1xe1 a7-a5 ⩲ Stockfish 13 - 64 bits BMI2) Rf8-e8 ⩲ Stockfish 13 - 64 bits BMI2.
The opening phase has turned in Capablanca's favor.