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Thursday, March 4, 2021

 
     Draws have long plagued the game. After the 1967 Capablanca Memorial in Havana, Svetozar Gligoric claimed that the increased percentage of draws in many strong tournaments didn't illustrate a decline of fighting spirit but rather the increased strength of the competitors. 
     Part of the problem explained Gligoric was the vast knowledge of openings which reaches deep into the middlegame plus there is a high level of defensive technique that even included players of "lesser reputations." I remember Reshevsky commenting that he did not believe Capablanca's play fell off much in his later years, but rather the higher level of the competition accounted for his results tapering off. 
     Gligoric added that gradually even the strongest GMs were becoming accustomed to "having to wear down every day a stubborn resistance which defies their powers and forces them to find ever keener weapons whereby to achieve victory." Remember that was back in 1967. 
     Then, along with the burden of having to come up with opening innovations which cause the opponent to have to devote time to finding a good antidote, one still is facing a capable opponent. Additionally, the GM is also tasked with finding moves to maintain the tension throughout five hours of play so even facing a lesser opponent is very tiring. Thus, when meeting their peers GMs may be inclined to accept an easy draw.
     The winner of the following game was Hector Rossetto (September 8, 1922 - January 23, 2009) who was one of the best players in Argentine history. He was awarded the IM title in 1950 and the GM title in 1960. He was a five-time Argentine Champion (1942, 1944, 1947, 1962, and 1972). He was a player from the Golden Age Argentine when the country boasted of Miguel Najdorf, Erich Eliskases, Herman Pilnik, Carlos Guimard, Julio Bolbochan and Oscar Panno. 
     From the 1960s to the 1980s his opponent, Silvino Garcia Martinez (July 4, 1944), was the leading Cuban player and is the first Cuban Grandmaster. He was awarded the IM title in 1969 and the GM title in1975. He has won the Cuban Championship four times (1968, 1970, 1973, 1979). He was awarded the title of FIDE Senior Trainer in 2007.
    In their game Garcia seemed to be on the way to developing a K-side attack, but Rossetto had plenty of pieces available for defense. When Garcia's "attack" ground to a halt Rossetto's 24...f5! turned the tables. Then it was Rossetto who had an overwhelming K-side attack which he finished up with his nifty 29th move surrendering his Q for two Bs...they more than enough compensation. 

Silvino Garcia - Hector Rossetto

Result: 0-1

Site: Capablanca Memorial, Havana

Date: 1967

Ruy Lopez

[...] 1.e4 e5 2.♘f3 ♘c6 3.♗b5 a6 4.♗a4 d6 5.c3 ♘f6 6.O-O b5 Rather unusual at this point, bur not at all bad. Usual is 6...Bd7 7.♗b3 ♗e7 8.d4 O-O 9.h3 ♘d7
9...h6 10.♘bd2 ♖e8 11.♗c2 ♗f8 12.d5 ♘e7 13.b3 c5 is equal and the players soon agreed to a draw. Laznicka,V (2517)-El Taher,F (2456)/Olomouc 2005
10.a4 ♗b7 11.a5 ♗f6 12.d5 Garcia elects to close the center. The other option is to keep the tension. Which method to play is a matter od preference.
12.♗e3 ♘e7 13.d5 g6 14.c4 is equal after 14...c6. Gazic,J (2289)-Hesse,J (2028)/Lueneburg 2013
12...♘e7 13.c4 ♘c5 14.♘c3 b4 15.♘a4 After this white's pieces get into an awkward position on the Q-side and he wastes time untangling them. Probably retreating to e2 would have been better. 15...♘xa4 16.♖xa4 c5 17.♖a1 ♘g6 18.g3 ♗c8 19.♔h2 ♖a7 20.♘g1 ♗g5 21.f4 This turns out to be a serious mistake in that it weakens the K-side and allows black a strong attack.
21.♗xg5 ♕xg5 22.♗c2 f5 23.exf5 ♗xf5 24.♘f3 ♕f6 25.♗xf5 ♕xf5 26.♘d2 ♖af7 27.f3 and white's defenses are adequate and black's attacking chances have been greatly reduced.
21...exf4 22.gxf4 ♗h6 Even better was 22...Bf6. Black's pieces on the K-side look clumsily placed, but that is an illusion as they will soon spring into action. 23.♗e3 ♕e7 24.♕d3 f5 The beginning of an irresistible attack. It's hard to believe that in just a few short moves white will be destroyed. 25.exf5
25.e5 is even worse. 25...♘xe5 26.♕e2 (26.fxe5 ♕xe5+) 26...♘g6 and black has picked up a free P.
25...♗xf5 26.♕d2 ♕e4 27.♖ae1 ♕d3 Trading Qs would not lessen the force of black's attack. 28.♕d1 (28.♕xd3 ♗xd3 29.♖f3 ♖e7 30.♗d2 ♖xe1 31.♗xe1 ♗e4 wins.) 28...♖e7 29.♗c1 ♖xe1 30.♕xd3
30.♖xe1 ♘xf4 31.♖f1 (31.♕xd3 ♘xd3 32.♗xh6 ♘xe1 wins) 31...♕xd1 32.♖xd1 would leave white with a hopelessly lost ending even though he is only a P down. 32...♗g6 33.♖f1 ♘d3 34.♖xf8+ ♔xf8 35.♗xh6 gxh6 36.♘e2 ♘xb2
30...♖xc1 Crushing. The Q is helpless against black's swarming pieces.
30...♗xd3 Black still has a huge advantage after this, but it is not nearly as good, or pretty, as 30...Rxc1 31.♖xe1 ♘xf4
31.♕f3 ♖xf1 32.♕xf1 ♗xf4+ 33.♔h1 ♗e4+ 34.♘f3 White resigned. A forceful game by Rossetto.
34.♘f3 And here is an example of the nastiness white is facing if he plays on... 34...♗e5 35.♗d1 ♘h4 36.♕e1 ♖f4 37.♔g1 ♗xf3 38.♗c2 (38.♗xf3 ♘xf3+) 38...♗xd5 39.♗d1 (39.cxd5 ♘f3+) 39...♗d4+ 40.♔h2 ♗xc4 etc.
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Wednesday, March 3, 2021

Pretty Purdy Game

     Recently I found the game played between Lajos Steiner and C.J.S. Purdy in the 1937 Sidney Invitational Tournament quite intriguing. 
      Purdy once used the position after black's 20th move in an article titled How To Reduce Oversights To A Minimum. Basically the reason reason for Steiner's mistaken reply was his failure to search for forceful replies to his intended 21.Nxa5. Instead he made the assumption that his opponent would try to trap the N and then spent a lot of time making sure that the N could successfully escape. Purdy asserted that had Steiner combed the board for forceful replies to 21.Nxa5 he would have seen the refutation 21...c3! 
     Another unusual feature of the game was Purdy having two Queens on the board in the middlegame...something usually seen only in the ending. The fact that Steiner managed to hold on against the two Qs for another 15 moves also makes the game unusual.
     IM Lajos Steiner (June 14, 1903 - April 22, 1975) was born in Hungary and emigrated to Australia in 1939. He was one of four children. His father was a mathematics teacher, and his older brother was Endre Steiner (June 27, 1901 – December 29, 1944) who died in a Nazi concentration camp near Budapest. 
    Lajos earned a degree in mechanical engineering in 1926 from the Technikum Mittweida, Germany. He has modest success in a lot of European tournaments before the war and played a few matches. In 1930, he lost (+3 –5 =2) to Isaac Kashdan. In 1934, he won (+7 –3) against Pal Rethy and in 1935, he defeated Henri Grob (+3 –1). He played for Hungary in four Olympiads and won the Australian Championship four times (1945, 1946/47, 1952/53, and 1958/59). He also won nine of his ten attempts at the New South Wales championship. 
     Steiner played in the 1937 Australian Championship and scored a perfect 11-0, but he was playing as a guest and was ineligible for the title. There was a four way tie for second between Goldstein, Hastings, Koshnitsky and Purdy who scored 7.5-3.5. In a rather unusual tie breaking arrangement Goldstein played Hastings at Perth and Purdy and Koshnitsky played in Sydney. The winners of the two matches then played each other by telegraph. It was Purdy who ultimately won. 
     After the championship Steiner proffered his opinion of the Australian players. Koshnitsky and Purdy were "chess players through and through," Goldstein was a good player and Crowl was "a real chess thinker." He stated that while they had a true understanding of the game, they needed international experience by playing against the leading European or American players. Steiner credited Purdy and his excellent magazine Australasian Chess Review for helping Australian players advance. He expressed curiosity as to how Purdy and Koshnitsky or Goldstein might fare in the British Championship. 
     Cecil Purdy (March 27, 1906 - November 16, 1979) was awarded the IM title in 1979 and Correspondence GM title in 1959 after winning the first world correspondence title. He was also an chess magazine writer, editor and publisher of renown. His son John, won the Australian Championship twice. His daughter Diana also played and she married New Zealand's leading player, Frank Hutchings, in 1960. 
     In the Sydney Invitational Tournament Steiner was taken by surprise and defeated in good style by both Koshnitsky and Purdy. Due to the fact that it was a double round tournament he was able to even the score in the second game, but he also dropped a half-point to young Cornforth, but was unable to overtake the leaders. After this tournament Steiner gave two simultaneous exhibitions before sailing for New Zealand where he stayed for two months

Lajos Steiner - Cecil Purdy

Result: 0-1

Site: Sydney Invitational

Date: 1937

Sicilian Dragon

[...] 1.e4 c5 2.♘f3 d6 3.d4 cxd4 4.♘xd4 ♘f6 5.♘c3 g6 6.♗e2 ♗g7 7.♗e3 ♘c6 8.f3 O-O 9.♕d2 Purdy had expected 9.g4. Instead Steiner takes a more positional path. 9...d5 This move is properly timed. Delaying it would deprive black of sufficient counterplay in the center. 10.♘xc6 bxc6 A favorite of Steiner in this position. 11.e5 ♘d7 12.f4 e6
12...f6 Purdy found this tempting, but decided against it because he analyzed a line in which white's dark squared B was freed plus the thought he could seize the initiative with ...c5. 13.♘xd5 Not considered by Purdy. 13...fxe5 (13...cxd5 14.♕xd5+) 14.O-O And black can play either 14...Nb6 or 14...Bb7 with equal chances.
13.O-O
13.♘a4 heading for the outpost on c5 is tactically faulty. 13...♘xe5 14.♗d4 ♘d7 15.♗xg7 ♔xg7 Black is better, but white played very poorly and was soon lost after 16.♕c3+ ♕f6 17.♕xc6 ♕xf4 18.♖f1 (18.♕xa8 ♕xa4 is also winning for black.) 18...♕xh2 19.O-O-O ♖b8 Tomic,D (2360)-Romanishin,O (2560)/Dortmund 1976
13...♕e7 Played only after long thought. He finally rejected ...c5 after all.
13...c5 was not thought to be good by either Steiner or Purdy because the after 14.Na4 black's Ps would have been forced to advance4 which would have left them somewhat weakened. However, at the same time they would have a cramping effect on white's pieces. 14.♘a4 d4 15.♗f2 ♗b7 16.b4 cxb4 17.♕xb4 and black seems to have qual play.
14.♘a4 a5 15.♕c3 This leads to tricky play that requires careful calculation by black.
15.c4 This was the move Purdy was most concerned about. There is no threat with the move, but he thought is gives white the initiative. He appears to have been correct. 15...♕b4 16.♕c2 f6 17.exf6 ♗xf6 18.♗g4
15...♗a6 A good move ridding himself of his bad B. 16.♗xa6 ♖xa6 17.♘c5 ♖aa8 18.a4
18.♘b3 c5 19.♗xc5 ♘xc5 20.♕xc5 ♕xc5+ 21.♘xc5 ♖ac8 22.♘d3 ♖xc2 is only very slightly in black's favor.
18...♖fc8 19.♘b3 This was correctly criticized by Purdy as being too ambitious. He recommended maintaining the blockade by 19.Nxd7 (19.♘xd7 ♕xd7 20.♗c5 with equal chances.) 19...c5 20.♕e1 c4 Objectively not the best, but Purdy has set a subtle trap into which Steine falls. Additionally, Steiner spent 90 minutes calculating the consequences of taking the a-Pawn just to make sure his N could escape. However, Purdy had no intentions of persuing the N.
20...f6 Is preferred by the engines and after 21.exf6 ♗xf6 and black stands slightly better.
21.♘xa5 (21.♘d4 is correct after which black;s advantage is nominal.) 21...c3 This surprise move is crushing! 22.♘b3 cxb2 23.♖a2 Steiner tries to keep the a-Pawn and maintain material equality, but in doing so he goes from the frying pan into the fire.
23.♖b1 is met by 23...♕a3 and white loses either the a-Pawn of the c-Pawn and eventually the game.
23...♖xc2 An amazing position. All of white's pieces are available for defense, but there isn't any and he is dead lost. Black's P on b2 and R on the second rank trump all of white's pieces. 24.♖f2 ♖c1 There is no way to meet this move. 25.♘xc1 b1=♕ With two Qs the win is routine, but what's the last time you saw two Qs on the board in what is essentially still the middlegame? 26.♖fb2 ♕e4 27.a5 f6 28.exf6 ♗xf6 29.♖e2 ♗d4 30.♘b3 ♗xe3+ 31.♖xe3 ♕4b4 32.♖d2 ♘c5 33.♘d4 ♕d6 34.♘f3 ♕dxf4 35.g3 ♕f6 36.♕e2 ♘e4 37.♖c2 ♕xa5 38.♔g2 ♕a6 39.♕d1 ♖c8 40.♖b3 ♘g5 With the time control having been reached white resigned.
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Tuesday, March 2, 2021

Munich 1942

     The White Rose was a non-violent, intellectual resistance group in Nazi Germany led by a group of students from the University of Munich whose activities started in Munich on June 27, 1942, and ended with the arrest of the core group by the Gestapo on February 18, 1943. The book telling there story is an exciting read. 
     The group conducted an anonymous leaflet and graffiti campaign that called for active opposition to the Nazi regime. After their arrest they faced show trials by the Nazi People's Court and many of them were sentenced to death or imprisonment. 
 
      
     The European Individual Chess Championship that was held in Munich in September, 1942 was advertised as the European Championship (Europameisterschaft).
     The tournament was organized by Ehrhardt Post (1881-1947), a master and functionary. As a player, Post had quite a few modest successes German events and from 1933 to 1945 he was a Managing Director of the Nazi “Grossdeutscher Schachbund.” 
     He was a principal organizer of the strongest chess tournaments in Europe during World War II. The idea that Munich 1942 was European Individual Chess Championship was as comical as the claim that the second Fischer-Spassky match in 1972 was for the world championship. 
     At Munich there were no players from, for example, the Soviet Union, Great Britain and Poland and the participation of any Jewish players was unthinkable. In his book Chess Marches On, Reuben Fine wrote, "Alekhine has participated in a number of European shindigs, including one so-called European Championship...his competitors were at best second-rate second-raters." His statement was as laughable as the claim the tournament was for the European Championship. Paul Keres, Ewfim Bogoljubow, Gosta Stoltz, Klaus Junge and others were hardly "second-rate second-raters." 
     Alekhine's game collections are still a treasure trove of fantastic games and surprising opening ideas. In the Munich tournament of the previous year Alekhine singled out his opponent, Braslav Rabar, as being a “very interesting” player, adding that his main defect was insufficient knowledge of the openings. In 1941 Rabar finished tied for 9th and 10th (out of 16). 
     Rabar (1919-1973) of Yugoslavia was Yugoslav Champion in 1951 and 1953 (jointly) and he played on three Yugoslav Olympiad teams (1950, 1952, 1954). Altogether he played in 13 Yugoslav championships. He is best remembered for designing the opening classification system that was used in the Chess Informant. He was also co-editor of the monthly chess magazine Sahovski Glasnik. 
     In the following game Alekhine finishes him off with a nifty little N sacrifice on g7.

Alexander Alekhine - Braslav Rabar

Result: 1-0

Site: Munich

Date: 1942.09.24

Catalan Opening

[...] 1.d4 ♘f6 2.c4 e6 3.g3 White adopts a combination of the Queen's Gambit and Reti Opening. Black has two main approaches: 1) play ... dxc4 and either try to hold on to the P with ...b5 or give it back for extra time to free his game, or 2) black can avoid capturing on c4 which gives him a solid, but cramped, position. 3...d5 4.♗g2 dxc4 5.♕a4+ ♗d7 6.♕xc4 ♗c6 7.♘f3 ♗d5 Black loses too many tempi with these bishop moves. Better is 7...Nbd7 as was played in the game Junge-Alekhine in the same tournament. 8.♕d3 c5 9.♘c3 ♗c6 Black has to oppose the B on the long diagonal immediately.
9...cxd4 10.♘xd5 ♕xd5 11.O-O and black has no satisfactory way of meetin the threat 12.Nxd4
10.O-O ♘bd7 11.♖d1 cxd4
11...♗e7 12.e4 and the threat of 13 d5 practically forces the exchange on d4 which gives white the advantage of the B pair. 12...cxd4 13.♘xd4
12.♘xd4 ♗xg2 13.♔xg2 ♗e7 14.♕f3 From here the Q exerts strong pressure on the Q-side.
14.e4 also worked out well for white. 14...O-O 15.♕e2 ♕a5 16.♗f4 ♗b4 17.♘b3 ♕b6 18.♖ac1 and white is slightly better. Nogueiras,J (2560)-Kortschnoj,V (2655)/Clermont Ferrand 1989
14...♕b6 Alekhine connented that this move will be refuted by energetic tactical play. but 14...Qb8 15.e4 was equally unsatisfactory. 15.♗e3 Alekhine observed that with this move (which hes gave a !) proves that black lacks any satisfactory defense. 15...O-O
15...♕xb2 loses quickly to 16.♘cb5 O-O 17.♖db1 winning the Q.
16.♘f5 ♗c5 This runs into a clever refutation.
16...♕d8 was best but white still has the upper hand after 17.♘xe7+ ♕xe7 18.♕xb7 ♖fb8 19.♕c6
17.♘a4 ♕a5 18.♘xc5 ♘xc5 19.♘xg7 This wins at least a P and leads to an easily won ending. 19...♔xg7 Of course this only cooperates with white.
19...♘ce4 Alekhine's line: After this, which represent black's best resource, white would force the Q to abandon the fifth rank and then he would occupy the long diagonal with the B resulting in a decisive advantage: 20 b4! Qe5 21 Bf4 Qb5 (or 21... Qc3 22 Nh5!!) 22 a4! Qxb4 23 Be5 etc. 20.b4 ♕e5 (20...♕xb4 21.♘h5 ♘xh5 22.♕xh5 e5 23.♖ac1 ♕e7 24.♕g4+ ♔h8 25.♕xe4) 21.♗f4 ♕c3 22.♘h5 ♕xf3+ 23.♔xf3 ♘xh5 24.♔xe4 with a winning endgame.
19...♘ce4 Stockfish's line: 20.♗h6 ♕e5 21.♖d3 ♖fd8 22.♖ad1 ♖xd3 23.♖xd3 ♖c8 24.♖e3 ♖c4 25.♖d3 ♖d4 26.♕e3 ♖xd3 27.♕xd3 ♘d6 With the advantage, bit Alekhine's line looks better. 28.♕f3
20.♗d4 The strength of this move lies mainly in the fact that after 20...Ncd7 White simply plays 21 Bc3, with the unavoidable threat of 22 Rxd7. 20...♘ce4 (20...♘cd7 21.♗c3 ♘e5 22.♕f4) 21.♕xe4 ♕f5 The endgame that follows is without any technical difficulties. 22.♕xf5 exf5 23.♖ac1 ♖fe8 24.♖c7 ♖xe2 25.♖xb7 ♔g6 26.♗xf6 ♔xf6 27.♖d6+ If 27...Kg7 the R on e2 will be forced to vacate the 2nd rank which allows the capture of the a-Pawn. Facing a lost ending Rabar resigned. This game shows that tactics don't always lead to mate or a big material game...some times they just lead to a small material or positional advantage or, as here, a won ending. (27.♖d6+ ♔g7 28.♖dd7 ♖f8 29.♔f3 ♖c2 30.♖dc7 ♖d2 31.♔e3 ♖d6 32.♖xa7)
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Monday, March 1, 2021

What's A Queen Worth?

 
     The following game features 1.h4 again. It's an irrelevant move which doesn't do a thing to gain center space or aid development and it weakens the K-side. On the plus side it has a pronounced psychological effect even on some pretty decent players...at least in blitz games. 
     Oddly, when you let engines look at the move all they do is shift white's opening advantage to black, he doesn't get a huge "winning" advantage. Strong human players take a different view. Even Hugh Meyers, an explorer from yesteryear who delved into odd and unusual openings, wrote, "If there were an election for the worst first move, 1.h4 would have excellent winning chances."  In his book Irregular Openings, author Tim Harding didn't think it was good for anything but Kriegspiel (which I've never played). 
     So, why play this horrid opening? Its psychological effect is amazing! It seems to say to the opponent that he doesn't have to bother thinking...just sit back, relax and play aggressively because he's probably playing a beginner who won't see the simplest threats. Things change when they realize they are losing...you can tell when that point is because suddenly they start using up time. 
     One specialist in this opening (if there is any such thing) advised that as white you shouldn't castle K-side and neither should black. He advocated both sides should keep their King in the center or castle Q-side. In either case expect some tactical fireworks. Just remember that you can't ignore the basic rules of development forever...you still have to stake out a share of the center and develop your pieces. Additionally, as always, think things through and just don't play mechanically. 
     In the following game my opponent had a pretty decent rating, but he blitzed out his opening moves in seconds and soon regretted it after he gave me the opportunity to trade my Queen for a bunch of pieces. 
     How much is a Queen worth? Every beginner learns the numerical value of the pieces and they also later learn that those numbers are not always reliable because the values can depend on what other pieces are on the board and their position. For anyone that's interested, chess.com has an article by GM Larry Kaufman on the relative value of the pieces HERE.

Tartajubow - Guest

Result: 1-0

Site: Internet G/10

Date: 2021

Hawaiian Orangutan

[...] 1.h4 d5 Eliminating the possibility of the Tartajubow Attack beginning with 2.Rh3. 2.d4 g6 None the engines score this as more than equal. The GM-like thinking Komodo 12 prefers 2...c5 with an evaluation of -0.25. Oddly, engines don't give black more than a minimal advantage no matter what (within reason!) move is played.
2...♘f6 3.h5
3.♗g5 ♘bd7 4.♘c3 h6 5.♗f4 a6 6.♘f3 e6 7.e3 c5 is even. Nordenbaek,J (2215)-Pedersen,B (2230)/Denmark 1992
3...h6 4.c3 ♗g4 5.♕b3 b6 6.♘f3 ♗xh5 7.e4 ♗xf3 8.gxf3 with equal chances in Fernandez,D (2496)-Bacrot,E (2722)/chess.com 2018.
2...c5 3.dxc5
3.e3 ♘c6 4.♘f3 ♗g4 5.♗e2 ♗xf3 6.♗xf3 e6 Equal. Horvath,P (2370)-Nagy,C/Debrecen 1997.
3...♘c6 4.h5 h6 5.c4 d4 6.a3 a5 7.e4 e5 Black is comsiderabl;y better. Dzhumagaliev,Y (2400)-Almasi,Z (2682)/Riyadh 2017
2...c5 This is Komodo's preferred line which results in no more that equality for black. 3.e3 ♘f6 4.c4 ♗g4 5.♗e2 ♗xe2 6.♕xe2 cxd4 7.exd4 ♘c6
3.h5 ♘c6 I think this is a mistake because it results in the weakening of his K-side when he is forced to recapture with his f-Pawn. (3...♗g7 4.hxg6 hxg6 5.♖xh8 ♗xh8 Is completely equal.) 4.hxg6 fxg6 5.c4 dxc4 6.d5 ♘e5 7.♗f4 ♗g7 8.♘c3 Black has two reasonable move here. One a computer move and another a more human move. 8...♗f5 Black made this move almost instantly, but it loses time and allows me to secure the center.
8...c6 This engine move results in equality, but it does not look very appealing to the human eye. 9.dxc6 ♕b6 10.♕a4 ♘xc6 11.♘b5 ♗e5 12.♗e3 ♕a5+ 13.♕xa5 ♘xa5 14.♘f3 ♗b8 15.♗d2 ♘c6 is the Komodo way.
8...b5 9.e4 (9.♘xb5 ♖b8 10.♘c3 ♖xb2 is equal.) 9...a6 with equality look more human-like.
9.e4 ♗g4 Also made instantly. This allows me to exchange my Q for more that enough material compensation. Plus, I also have excellent development and a ready made attack against black's K. From here on there is very little black can do.
9...♗d7 is relatively best. 10.♗xe5 ♗xe5 11.♘f3 ♗g7 12.♗xc4 and white is much better.
10.♗xe5 ♗xd1 11.♗xg7 ♗h5 This appears to shield the h-Pawn after the R is captured, but it's illusory.
11...♗g4 isn't much better as after 12.♗xh8 ♕d6 13.♗xc4 ♘f6 14.♗xf6 ♕xf6 15.f3 ♗d7 16.♖xh7 white is still much better.
12.♗xc4 ♘f6 13.♗xh8 a6 14.♗xf6 exf6 15.g4 ♗xg4 16.♖xh7 Now the R is lost. 16...♕d6 17.♖h8+ ♔e7 18.♖xa8 Now white has a relatively easy win as there isn't much the Q and B can accomplish against so many pieces. 18...♕b4 19.♗b3 f5 20.e5 f4 21.♘ge2 f3 22.♘g3
22.d6+ Is the clever engine way. Tactically it makes room on d5 for a N fork on the Q and K. There follows: 22...cxd6 23.♘f4 ♗e6 24.♗xe6 ♕xf4 25.♘d5+ Mates in 11 moves.
22...♕f4 23.♖d1 The best move is still 23.d6+
23.d6+ ♔d7 24.dxc7 ♕xe5+ 25.♘ge4 ♔xc7 26.♘d5+ ♔d7 27.♘df6+ ♔c6 28.♖c1+ ♔b5 29.♖c5+ ♕xc5 30.♘xc5 ♔xc5 31.♘xg4 g5 32.♗d1 b6 33.♖xa6 ♔b5 34.♖a7 ♔c6 35.♗xf3+ ♔d6 36.b4 ♔e6 37.♔e2 ♔d6 38.♔d3 ♔e6 39.♔d4 ♔f5 40.♔d5 ♔g6 41.♗e4+ ♔h5 42.♘f6+ ♔h6 43.♖h7#
23...♕xe5+ 24.♘ge4 ♗f5 25.d6+ This is the best move here, but it lacks the clever finesse of playing it earlier. 25...cxd6 26.♖xd6 ♕a5 27.♖d5
27.♔d1 Frees up the N to do some serious damage... 27...♕e5 28.♘d5+ ♕xd5+ 29.♗xd5 ♗xe4 30.♖e6+ ♔f7 31.♖xe4+ ♔f6 32.♖f8+ ♔g7 33.♖f7+ ♔h6 34.♖e6 a5 35.♗e4 a4 36.♖xg6+ ♔h5 37.♖h7#
27...♕b4+⁠−28.♖e5+ ♔d7 29.a3 ♕xb3 30.♘c5+ ♔d6 31.♘xb3 ♔xe5 32.♖b8 b5 33.♖b6 ♗d3 34.♖xa6 b4 35.♖a5+ ♔f4 36.axb4 g5 37.♘d4 g4
37...♔g4 38.♘d5 ♔h5 39.♘f4+ ♔h6 40.♘xd3 g4 41.♖a6+ ♔g5 42.♔d2 g3 43.fxg3 f2 44.♘xf2 ♔h5 45.♔e3 ♔g5 46.♘f3+ ♔h5 47.g4#
38.♘e6#
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