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We choose, as an illustration of the Yifan's style, a game played by Yifan Hou during the Chinese Chess Championships 2006, in Wuxi, CHN. This game puts forward many examples of C67-Totally Pure Openings (i.e. Positions) (TPOP:) (see at this subject the "New Chess Theory" Lecture:
NCT V - "Opening new understanding"). In addition, this
interesting game incorporates a short but significant Opening
Speculative Phase (OPSP:) (see in the "New Chess Theory" Lecture:
NCT IV - "Unfolding of a game" ).
Hou, Mihail (2298) - Ruan, Lufei (2370)
According to usual Chess databases: the Berlin Defense 3...Nf6 is introduced in the game Von Heydebrand und der L, Tassilo - Salpius, 1-0 (C61), Berlin, 1836 and 4.0-0 was played for the fist time in the game Mayet, Carl - Harrwitz, Daniel, 0-1 (C65) Berlin m, 1847. Regarding the Open Variation 4...Nxe4, this move is due to Bernhard Horwitz, in the game Bird, Henry Edward - Horwitz, Bernhard 1-0 (C67) London m2, 1851.
The old move 7...Ne4!? (MacDonnell, George Alcock - Minchin, James Innes ½-½ (C67-Totally Pure Opening) BCA-01 Challenge Cup+ 1886), was rehabilitated in 1980-82 by Antonio Rosimo and Arthur Bernard Bisguier; this choice is always practised nowadays. But the main answer, also an old move but routinely used today, is 7...Nf5 (Shallopp, Emil - Riemann, Fritz 0-1 (C67-Totally Pure Opening) Berlin m, 1880).
DIAG 1
:
Is not very convincing: 8.Qe2!? Nd4! 9.Nxd4 Qxd4 10.Rd1 Bg4! 11.Rxd4 Bxe2 12.Nc3 Bh5 = (Rendi, Eva (2187) - Olarasu, Gabriela (2353) ½-½ (C67-Totally Pure Opening) ROM-chT Tusnad, 2005). Now, after 8...Kxd8, correct is the alternative: 9.Rd1+ Ke8 10.Nc3 h6 +/= (Vogt, Lothar (2484) - Sargissian, Gabriel (2611) 0-1 (C67-Totally Pure Opening) Mainz Ordix op rapid, 2005). By the way, let us notice that nowadays have his King uncastled, after Queens exchange, is not considered any more, by grandmasters, as a disadvantage.
DIAG 2
:
The 17 first half-moves constitute the Opening Theoretical Phase(OPTP:) and the following 3 half-moves constitute precisely the Opening Speculative Phase (OPSP:) (see in the "New Chess Theory" Lecture:
NCT IV - "Unfolding of a game" ):
The main line is: 9...Ke8 10.h3 a5! (Rustem Dautov, 1986) 11.Rd1 +/= (Comp Fritz 5 - Anand, Viswanathan (2770) 0-1 (C67-Totally Pure Opening) Chess Classics Duell rapid, 1998), but many other 11th White move are more or less regularly played like: 11.Bf4, 11.Ne2, 11.g4, 11.b3, 11.a4, 11.Re1, 11.a3, 11. Ne4, 11.Bd2. Another classical continuation is: 9...h6 (10.Bd2 Be6 11.Ne2 c5 12.Bc3 = Tarrasch, Siegbert - Lasker, Emanuel 1-0 (C67-TPO), Hastings, 1895) 10.h3 Ke8 11.a3 Ne7 +/= (Milos, Gilberto (2820) - Galego, Luis (2522) 1-0 (C67-TPO) Sao Paulo 4th, 2005).
DIAG 3
:
Is also played 11.Rd1, since the game: 11.Rd1 b6 12.b3 a5 13.a4 Be7 14.Bb2 h5 +/= (McShane, Luke J (2592) - Ivanchuk, Vassily (2704) ½-½ (C67-TPO) Sigeman & Co 11th, 2003). Now, 12...a5!? is indeed a novelty, but not really a theoretical one, because this move is thematic and very often used in such a position.
DIAG 4
:
With three last White moves, Yifan finds an original way for seizing initiative; in the same time we enter directly in the Deep Middle Game (DEMG:) (see in the "New Chess Theory" Lecture:
NCT IV - "Unfolding of a game" ). Is equally strong: 15.e6!?
f6 16.Nge4! h5 17.g5! +/=. The interest of this game comes also
from what Black's play, although defensive, seems rather correct:
DIAG 5
:
We wish to verify how White initiative is connected with an effective "spatial domination" (see in the "New Chess Theory" Lecture:
NCT VII - "Control and Domination I"
and
NCT VIII - "Control and Domination II" ).
The cartography of this position (DIAG 5) is the following:
In this conditions we have the numerical values:
From this values we immediately deduce the "Radiation rates":
WRR = 100 x 30
/ (64 - 9) % =
55 % Thus, White domination is significative!
All this game is played at a rather high level... Effectively, we may indicate the following features:
DIAG 6
:
This long Deep Middle Game is passably complicated and it is not easy for both camps to find better moves. Is not clear: 18.e6!? f6 19.Nf3 f5! 20.Nxa4 fxg4 21.hxg4 hxg4 22.Ne5 c5! =/unclear. After 18.Kg3, Black does not find a better defense with: 18...hxg4 19.hxg4 Nd5 20.Nxd5 cxd5 21.Rxd5 axb3 22.axb3 Ra2 23.Rb1! Be7 24.Rd2! +/-. In addition, it is not obvious that 19...c5!? is better than the move chosen by Ruan Lufei: 19...c5!? 20.Rf2 Nc6 21.Nce4 hxg4 22.hxg4 Na5 23.e6! f6 24.Nxf6! gxf6 25.Bxf6 Rg8 26.Re2! +/- leads to a significant White advantage. Finally, it is possible that 20.e6!? is stronger than Yifan Hou's choice, but again all is not limpid: 20.e6!? f6 21.Nge4! (21.Nf7?) hxg4! 22.hxg4 f5! 23.Nf2 Bd6 24.Ne2 Ne7 (Ra2!?) 25.g5! (25.Bxg7?!) Rh5 26.Nh3! +/-.
DIAG 7
:
It is not surprising at all that we find here again an impressive White "Radiation rate"; once more let us establish the cartography of this position (DIAG 7):
In this conditions we have the numerical values:
Of this values we immediately deduce the "Radiation rates":
WRR = 100 x 32
/ (64 - 6) % =
55 % In accurate value (not an estimation at the unit), White result is even a little better as the previous one, but it doesn't matter!
What a pity! Yifan, near the end of this fascinating game, misses the right continuation: 26.Kf4! Bd7 (Kc8 +-) 27.Rg1 Rh5 28.e6 fxe6 29.Bxg7 exf5 30.Nf6 Bxf6 31.gxf6 +- and White wins without any problem. At all events, White preserves a real advantage, but Black defends himself rather well and the battle remains rough.
DIAG 8
:
All this endgame is interesting to follow and reveals the good technique of both players; and particularly of Yifan!
DIAG 9
:
Instead of 32...Rf8? the most accurate defense is: 32...Bc6! 33.exf7 Bf4+ 34.Kg1 Rf8 35.Nf2 Bd7 +/- and is not easy for White to find a good way towards the victory. Now, the game is finished... Well done Yifan!
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