MÓDULO VI: ENTORNOS VIRTUALES DE APRENDIZAJE
J. PLAN DE IMPLEMENTACIÓN DE PLAN ESTRATÉGICO PARA TRANSFORMACION DIGITAL
4. EVALUACIÓN Y SEGUIMIENTO
There are many ways to transpose into the Benko Gambit from several other openings. Even when Black has the opportunity to play the gambit, he can postpone entering it until later, when White may make a move which does not fit any anti-gambit system or which may allow Black to transpose into an inferior variation for White. Or perhaps White may unwittingly allow the loss of a tempo whereupon the Black pawn sacrifice may be an excellent choice either for counterattacking possibilities or to free Black's position and avoid a possibly long defense.
There are times, of course, when Black has no o
p
portunity to play the gambit until later in the game. See, for example, the game Calvo-Benko in the Appendix, which opened with 1 P-K4 and at first became a Pirc Defense, then transposed to a King's Indian Defense, and finally to a Benko Gambit.A similar mixed transposition occurred in a game Hort-Gaprin dashvili, Goteborg 1 97 1 : 1 P-K4 P-KN3 2 P-Q4 B-N2 3 P-QB4 P-QB4 4 P-Q5 P-QN4!? 5 P x P P-Q3 6 N-QB3 P-QR3 7 N-B3
(Approximating a position in the Deferred Variation) 7 . . . N-B3 8 P-QR4!? 0-0 9 B-KB4 Q-R4!? 1 0 N-Q2 P X P 1 1 B X NP B-QR3 12 0-0 Q-N5!? 13 Q-B2 B X B 14 P X B?! (White gains a distinct advantage on 14 N x B N-R4 15 B-N5 Q x NP 1 6 Q x Q B X Q 1 7 B X P B X R 1 8 B X R R X P 1 9 B X P) 1 4 . . . QN-Q2 1 5 P-R3 KR-N 1 1 6 R-R6 R X R 1 7 P X R Q-R4 1 8 P-K5 P X P 1 9 N-B4 R-N5??? (Too bad! After 1 9 . . . QxP or 19 . . . Q-N5 20 B X P R-R 1 the game is even) 20 N x Q, Black resigned.
F1
It is the King's Indian Defense which yields the greatest number of transposition opportunities, which is not surprising since the entire Benoni group is an offshoot of the King's Indian.
After a normal King's Indian beginning: 1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 P-K4 P-Q3 5 B-K2 0-0 6 B-N5, Black might be of the opinion that this Bishop move would not fit very well into the Benko Gambit. So, adding the fact that White's King
Bishop has already moved, Black takes the first step towards the gambit: 6 .. . P-84 7 P-QS.
Fla
At this point, the gambit may still be postponed. Two interesting examples follow:
Paulson-Soltis, World Student Team Championship 1 968, con tinued: 7 . .. P-QR3 8 P-QR4 P-R3 9 B-R4? (B-B4 is better-see
the next game) 9 . . . Q-R4 10 Q-Q2 P-QN4! 1 1 BP X P P X P 1 2 B X P B-Q2!? 1 3 R-R3 (B-Q3) 1 3 . . . Q-N5 (Black stands better) 1 4 P-B3 B X B 1 5 P X B R X R? ( 1 5 . . . QN-Q2 1 6 N-K2 N-N 3 1 7 R X R R X R 1 8 0-0 QN X P leaves White i n a n unenviable position) 1 6 P X R Q X RP 17 KN-K2 QN-Q2 1 8 0-0 R-R 1 and Black won the game even though he had only a small edge here.
From the diagram, the game Uhlmann-Geller, Majorca 1970, continued: 7 . .. P-KR3 8 B-84 P-R3 9 Q-Q2 K-R2 10 N-B3
P-QN4!? (Better late than never!) 1 1 P X P P X P 1 2 B X N P Q-N 3 ! (The threat i s 1 3 . . . N x KP and 1 3 P-QR4 i s n o defense because of 1 3 . . . N x KP anyway, and if 14 N xN Q X B !) 1 3 B-K2 Q-N5 1 4 P-K5 N-R4 1 5 B-N 3 B-R3 1 6 B X B R X B 1 7 P x P P X P 1 8
0-0 N-Q2 1 9 QR-K1 N X B 2 0 RP X N N-N3 (Black has an edge) 2 1 R-K2 N-B5 22 Q-Q3 KR-QR 1 23 P-N3 Q X N 24 Q x Q B X Q 2 5 P X N R X P 2 6 R X R R X R 2 7 R-B I B-B3 2 8 K-B l P-R4 29 N-K1 P-N4 (Now Black's advantage has grown. White has a very difficult position despite the even material) 30 R-B2 R-R8 3 1 K-K2 K-N3 32 N-B3 K-B4 33 N-Q2 P-N5 34 N-B 1 B-Q5 35 N-Q2 R-KN8 36 N-N3 B-K4 37 N-Q2 R X P 38 K-B 1 R-R7 39 K-N l
R-R6 40 N-B l P-R5 4 1 K-N2 P X P 42 P X P K-K5 43 R-B2 P-B 3 44 R-R2 R-R l and White resigned. To the end, Geller demonstrated the technique of a great master.
In Novi Sad 1 972, the game Deze-Benko continued: 8 B-K3
P-QN4!? 9 P X P P-QR3 10 P-QR4!? Q-R4 1 1 B-Q2 ! P X P 12 B X NP N-R3 1 3 N-B3 N-QN 5 1 4 0-0 B-R3 1 5 R-K 1 Q-N 3 1 6 B-QB l B X B 1 7 N X B KR-N 1 1 8 R-R3? ! N-Q2 1 9 Q-N 3 Q-N 2! 20 B-Q2 N-N3 21 B X N P X B 22 Q X P N X RP 23 N/ 3-Q4? (23 R x N R X R 24 Q X R Q x N 25 Q x Q R X Q with a slight edge for Black) 2 3 . . .
B X N 24 R X N B-B4! 25 Q-B4 R X R 26 Q x R Q X N , White re signed.
Flb
After 1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 P-K4 P-Q3 5 B-K2 0-0 6 B-NS P-B4 7 P-QS P-QN4!? 8 P X P P-QR3,
there are two major branches, differentiated by which player makes the next capture on the Queenside . White may try to utilize his QN5 as a base for his pieces, continuing with 9 P-QR4!? Q-R4 10 B-Q2 P x P, which was played in Uhlmann-Adamski, Polanica Zdroj
1 968.
That game continued: 11 B x P B-QR3 12 KN-K2 QN-Q2 1 3
0-0 B X B 1 4 N X B Q-N 3 1 5 Q-B2 KR-B 1 1 6 B-B3 P-B5 1 7 B-Q4 Q-N 1? (With his next move, a rather strange maneuver and an expensive loss of time) 18 KR-B 1 Q-N 2 19 N-R3 (White now has the initiative and the better chances) 19 . . . N-B4 20 B x N R X B 2 1 N x P QR-B 1 2 2 P-QN 3 N x KP!? 2 3 Q X N B X R 2 4 R X B Q X N P
25 N-K3 Q-N 7 26 R-K 1 R/ 1-B2 27 P-R4 P-R4 28 K-B 1 R-N2 29 P-N 3 K-B 1 30 Q-B3 R-N 5 3 1 N-KB4 Q-B3 32 K-N 2 R x RP (With the disappearance of his QRP, White's chances are now only m ini mally better, but Black still has a difficult defense) 33 R-QN 1 R-B 1
34 Q-K2 K-N 2 35 R-N7 R/ 1 -QR 1 36 N-B4! R/ 5-R2 37 R-N 3 R-R7 38 Q-K4 R/ 7-R3? 39 R-KB3 Q-R8 40 Q x P R/ 1-R2 41 N-K6ch, and Black resigned.
From the diagramed position, the game Kenez-Melcghegyi, cor respondence 197 1-72, continued : 11 N x P Q-N3 12 Q-B2 B-Q2
13 R-R3 N-R3 14 N-R3 P-K3 (The position is unclear, with an interesting battle in view) 1 5 P X P P X P 1 6 0-0 N-QN5 17 Q-N3?! (Q-N l ) 1 7 . . . N x P 18 BXN PXB 1 9 QXP P-Q4 (Now Black seems to have the slightly better chances because of h is two Bishops and better center control) 20 P-R5 Q-N2 2 1 P-B3 QR-N 1 ?! 22 P-R6 Q-N3ch 23 K-R 1 B X N 24 P-R7? (24 P X N is much better) 24 . . . B X B ! 25 P X R=Q Q X Q/ 1 26 Q X Q R X Q 27 KR-K 1 B X NP! 28 R-K3 N-B6 29 R/ 3 X B N X R 30 R X N B-Q5, and Black has the much better game which he conducted to a successful con clusion.
After 1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 P-K4 P-Q3 5 B-K2 0-0 6 B-NS P-B4 7 P-QS P-QN4 8 P x P P-QR3,
White may continue directly with 9 P X P.
In Filip-Calvo, Havana 1 966, the continuation was: 9 . .. N x RP
10 N-B3 Q-N 3 1 1 QR-N 1 P-R3 1 2 B-R4?! (B-B4) P-N4 1 3 B-N3 N-R4 1 4 0-0 NxB 1 5 RP XN N-B2 16 B-B4 B-N5 1 7 Q-B2 KR-N 1 1 8 N-Q2 B-Q2, and White had the slightly better chances, but Black later won.
9 . . . Q-R4!? 10 Q-Q2 B X P 1 1 B X B N X B 12 KN-K2 KR-N1 13 0-0?! (P-B3) 1 3 . . . Q-N5 14 P-K5 P X P 15 QR-N 1 R-R2 1 6 KR-Q 1 R-Q2 1 7 N-N3 N-K1 1 8 Q-K2 N/ l -B2 1 9 B X P R X B 20 P-Q6 R/ 2-K 1 21 P X N N x P, and Black is slightly better; he won. The game Woodhaus-Brodie, Adelaide 1 97 1 , continued : 13 P-B3
P-B5 14 B-K3 N-B4 15 0-0 KN-Q2 16 KR-Q 1 N-K4 17 QR-N 1 N-R5 (Black has a clear advantage) 1 8 Q-B2? N-Q6 1 9 N x N Q X N 2 0 P-N3 Q X RP 2 1 Q X Q R X Q 2 2 N-Q4 B XN 2 3 B X B N-B5! (And wins) 24 R-N2 RXR 25 BXR RXP 26 B-Q4 P-B6 27 K-B2 P-B7 28 R-QR 1 P-B3 29 B-K3 N-Q6ch 30 K-K2 K-B2 3 1 R-KB 1 R-N8, White resigned.
F2
If we trust in statistics we must conclude that the pawn sacrifice with . . . P-QN4 in this variation of the King's Indian offers Black very good chances. But the sacrifice can be considered in other variations as well. Here are a few examples (the King's Indian with P-KN3 for White is examined in Variation F3).
After 1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 P-K4 0-0 5 B-K3 P-Q3, the game Liardansky-Vasiukov, USSR Cham pionship 1964, continued: 6 P-KR3 (P-B3) P-B4 7 P-QS (On 7 P x P Q-R4, but 7 N-B3 is to be considered) 7 . . . P-QN4!? 8 P X P Q-R4 9 B-Q3 P-QR3 10 P X P B X QRP 1 1 N-K2 Q-N5 1 2 B X B N X B 1 3 Q-B2 Q-B5 14 0-0 N-QN5 1 5 Q-N 1 KR-N 1 (Black's pressure on the Queenside and in the center gives him a slight pull) 16 R-Q 1 R-R4 17 R-Q2 N-Q2 18 P-R3 Q-R3 19 Q-Q 1 N-K4 20 R-B 1 N/ 5-Q6 21 R-N 1 P-B5 .
White has been defending himself stubbornly and was threatening P-B4. Black's solution, P-B5, does strengthen the position of the vital Knight at Q6, but it also gives White the use of his Q4 square, through which he is able to offer sufficient resistance. The game continued: 22 N-Q4 R-N2 23 R-K2 N-B4 24 R-B2 P-R4 25 Q-K2 N/ K-Q6 26 P-KR4 N-K4 27 P-B3 N/ B-Q6 28 R-Q 1 B-B3 29 P-KN3 Q-R 1 30 K-N2 Q-N 1 3 1 R/ 1-Q2 R-R 3 32 B-N 1 K-R2 33 B-K3 Q-K 1 34 B-N 1 R/ 3-N3 35 N-Q 1 Q-R5 36 N-B3 Q-Q2 37 N-Q 1 Q-R5 38 N-B3, drawn. After 1 P-Q4 N-KB3 2 P-QB4 P-B4 3 P-QS P-Q3 4 N-QB3 78
P-KN3 5 P-K4 B-N2 6 P-KR3, Black decides that White's last move is a wasted tempo in Benko Gambit positions. The game Mititelu-Bilek, Zalaegerszeg 1 960, continued: 6 . . . P-QN4!? 7 P X P P-QR3 8 P X P 0-0 9 B-Q3 N X RP 10 KN-K2 N-QN5 1 1 0-0 N-Q2? (N X B) 1 2 B-QN5! N-N3 1 3 B-K3 B-Q2 1 4 B X B Q X B 1 5 P-R3 N-R3 1 6 P-QN4 N-B5! 1 7 P-N5 N x B 1 8 B P X N N-B2 19 P-QR4 R-R4! 20 Q-B2 N-R l 2 1 R-R2, drawn. Black, with his powerful Bishop and solid blockade on the Queenside, might have continued without risk.
Also see the game Barcza-Filip in Variation A.
In the game Mititelu-Plachetka, Luhacovice 197 1 , another Queen side impasse was reached: 1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 P-K4 0-0 5 P-KR3 P-B4 6 P-Q5 P-Q3 7 B-N5 P-N4!?
8 P X P Q-R4 9 B-Q2 P-QR3 10 P X P QN-Q2 1 1 N-B3 B X P 12 B X B Q X B (The chances are equal) 1 3 Q-K2 KR-N l 1 4 QR-N l R-N5 1 5 P-R3 R-N2 (R-N6) 1 6 Q x Q R X Q 1 7 0-0 R/ 3-N3 1 8 N-R4 R-R3
19 N-B3 R/ 3-N3 20 N-R4 R-R3, drawn.
The game Farago-Szabo, Budapest 1 972, was an interesting fight:
1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 B-N2 4 B-B4 P-B4 5 P-Q5 P-Q3 6 P-K4 P-QN4!? 7 P X P 0-0 8 N-B3 P-QR3 9 P X P QN-Q2 1 0 N-Q2 N-N3 1 1 B-K2 B X P 1 2 0-0 Q-Q2 1 3 R-K 1 B X B 1 4 Q X B KR-N l 1 5 P-KR3 Q-N2? (N-R5 !) 1 6 P-QR4! (White has the edge) 16 . . . R-R4 17 R-R3 R/ 1-R1 18 N-N3 R/4-R3? (Necessary was 18 . . . R/ 4-R2 in order to avoid the pin after White's 2 1 st move) 1 9 P-R5 N-B 1 20 P-K5 ! (This is now a decisive breakthrough) 20 . . . N x P 2 1 Q-B3 Q-N5?! (If 2 1 . . . P-K3 22 P X P and 23 N X P) 22 R-K4 N X B 23 R X N ! Q-N l 24 R X P P X P 2 5 N X P Q X P (If 2 5 . . . R X P 2 6 R X Bch) 2 6 N X R Q X R 27 Q-Q5 P-K3 28 Q-Q7 B-B 1 29 N-K4 N-K2 30 Q x P and White won.
F3
Sometimes it is possible to transpose to the Benko Gambit from the P-KN3 variations of the King's Indian Defense. For instance, after 1 P-Q4 N-KB3 2 P-QB4 P-B4 3 P-Q5 P-KN3 4 N-KB3 B-N2 5 P-KN3 0-0 6 B-N2 P-Q3 7 0-0, a well-known position is reached (Korchnoi-Bouaziz, Sousse 1 967, for example).
White has intentionally postponed the development of his Queen Knight in order to be able to meet 7 . . . P-K3 8 P X P B X P 9 N-N5 B X P 1 0 B X P QN-Q2 with 1 1 N-R3 ! with advantage. But Black may avoid that now dubious Exchange sacrifice line by transposing to the Benko Gambit.
In the game Vukic-Velimirovic, Yugoslavian Championship 1 972, Black postponed the gambit slightly by 7 . . . P-QR3?! (P-QN4 is better) 8 N-B3 (P-QR4) P-QN4?! 9 P x P P X P 10 N x P QN-Q2
1 1 N-B3 N-N3 !? 12 R-K 1 Q-Q2 1 3 P-QR4 B-QR3 14 P-K4 (P-R3) N-N5 15 Q-B2 KR-N l 16 P-N 3 P-B5 ! (Starting a wild melee of complications) 17 P-N4 N x QRP 18 R X N B X N 19 R X B B X R 2 0 R X R B X Pch 2 1 Q X B ! R X R 2 2 Q-Q4 Q-R2 (Black has the more promising position) 23 B-N2 Q x Qch 24 N X Q R-R7 25 B-QB3 N-K6 26 B-B3 N-B7 27 N-K2 R-R6 28 K-B2 R-N6. Black has the advantage here because White's pieces are tied down to the maintaining of the blockade of Black's dangerous QBP. However, the game ended in a draw.
From the diagram, the more direct transposition was seen in Portisch-Szabo, Budapest 1 972: 7 . . . P-QN4!? 8 PxP P-QR3 9 N-B3 P X P 10 N x P (Reaching the same position as in the previous example, in which White did not avail himself of the opportunity to avoid it) 10 . . . B-QR3 11 N-B3 QN-Q2 12 Q-B2 Q-R4 1 3 R-K 1 KR-N 1 (N-N3 !) 1 4 B-Q2 Q-N3 (A loss o f time. N-N3 was still the correct move) 15 P-N 3 R-R2 (P-BS) 16 QR-N 1 Q-N2 1 7 B-B4! Q-N5 ( 1 7 . . . N X P 1 8 N X N Q xN 1 9 N-K5 and 2 0 N-B6) 18 P-KR3 R-QB 1 19 B-Q2 P-B5 20 KR-QB l R/ 2-B2 2 1 N-Q4! P X P 22 N-B6 P X Q 23 R X Q N-B4 24 R X P, and White won.
The game Dzhindzhichashvil i-Grigorian, USSR Championship 1 972, varied with 12 P-KR3 Q-N 3 13 Q-B2 KR-N 1 14 R-K 1 N-K 1
1 5 R-N l !? N-B2 (How about 1 5 . . . B X N !? 1 6 Q X B B-N2 to regain the pawn?) 1 6 B-N5! K-B 1 1 7 Q-Q2 N-N4 1 8 B-R6 N x N 1 9 Q X N N-B3 2 0 B X Bch K X B 2 1 P-K4 Q-N5 2 2 Q X Q R X Q 23 P-K5, and White had a slight edge which h e was able t o convert to a win.
In Mista-Spiridonov, Cienfuegos 1 972, White played 9 P X P
(instead o f 9 N-B3). The game continued : 9 . .. B X P 10 R-K1
(N-B3) QN-Q2 1 1 P-K4? ! N-N5, transposing to a position similar to Variation E 1 , where this game is given.
A different approach for White was seen in Keene-Friedgood, Caorle Zonal 1 972: 1 P-Q4 N-KB3 2 P-QB4 P-B4 3 P-QS P-KN3 4 N-KB3 B-N2 5 P-KN3 0-0 6 B-N2 P-Q3 7 0-0 P-QN4!? 8 P X P P-QR3 9 P-N6?! QN-Q2 10 N-B3 N XNP 1 1 P-K4 B-N5? ! (P-QR4) 1 2 Q-B2 B XN 1 3 B X B KN-Q2 14 R-N 1 Q-B2 15 B-K2! P-K3 1 6 P-QR4! P X P 1 7 P-R5 ! N-B 1 1 8 N X P Q X P 1 9 B-KN5 P-B3 20 B-Q2 Q-Q 1 2 1 N-B4 (White has an obviously superior position. The many holes in Black's camp are too high a price to pay for his extra pawn) 2 1 . . . R-K1 22 B-B4ch K-R 1 23 N-K6 Q-N 3 24 P-QN4 Q-R2 25 B-Q5 QR-N 1 26 P X P N X P 27 B-K3, and White won.
At the Skopje Olympiad 1 972, the game Csom-Ghizvadu pro ceeded: 1 N-KB3 P-KN3 2 P-KN3 B-N2 3 P-Q4 P-QB4 4 P-B4 N-QB3 5 P-Q5 N-R4 6 KN-Q2 P-QN4? ! 7 P X P P-Q3 8 N-QB3 N-KB3 9 B-N2 0-0 10 QR-N 1 P-QR3 1 1 0-0 P X P 12 N X P B-QR3 1 3 P-QR4 Q-Q2 1 4 P-QN4!? P X P 1 5 R X P QR-N 1 1 6 N-N3 B X N 1 7 P X B R X P 1 8 R X R Q X R, drawn.