Sigurður Arnarson heldur fyrirlestur um peðakeðjur

Mánudagur, 4. apríl 2011

Fyrsta fimmtudag í hverjum mánuði eru haldnir fræðslufyrirlestrar hjá Skákfélagi Akureyrar. Fyrsti fimmtudagur í apríl ber upp á sjöunda dag mánaðarins og þá mun Sigurður Arnarson fjalla um peðakeðjur, gagn þeirra og hvernig ráðast ber gegn þeim.

Í þessari umfjöllun verður að sjálfsögðu minnst á Aron Nimzowitsh sem hafði mikil áhrif á skilning manna á skák m.a. með útgáfu á bókinni My System árið 1925. Hann lagði áherslu á að ráðast gegn grunni peðakeðjunnar en sterkustu skákmenn nútímans ráðast einnig gegn fremsta hluta hennar ef það hentar betur.

Fyrirlesturinn er einkum byggður á bókunum Secrets of Modern Chess Strategy- Advances since Nimzowitsch eftir John Watson og Dynamic Pawn Play in Chess eftir Dražen Marović. Báðar bækurnar hefur Sigurbjörn Björnsson skákbóksali haft á boðstólum. Auk þess leitar Sigurður fanga hjá The Internet Chess Club (ICC) einkum í fyrirlestra IM John Watson´s sem bera heitið Beyond the Opening.

Fyrirlesturinn hefst kl. 20 og er aðgangur ókeypis og öllum heimill meðan húsrúm leyfir.

Veljið skák (21 alls):

[Event "FIDE-Wch k.o."] [Site "New Delhi/Teheran"] [Date "2000.12.24"] [Round "7.4"] [White "Anand, Viswanathan"] [Black "Shirov, Alexei"] [Result "1-0"] [ECO "C11"] [WhiteElo "2762"] [BlackElo "2746"] [Annotator "Anand"] [PlyCount "81"] [EventDate "2000.11.27"] [EventType "k.o."] [EventRounds "7"] [EventCountry "IND"] [Source "ChessBase"] [SourceDate "2001.03.20"] 1. e4 {Needing only a point from 3 games to become World Champion, I decided just to play a normal game and to forget about the score. I had to check all the openings that Alexei plays, but this year we have played a lot of French Defences, so I wondered if he would repeat.} e6 2. d4 d5 3. Nc3 Nf6 4. e5 {In Sydney, I went for 4.Bg5, but didn't get much out of the opening.} Nfd7 5. Nce2 {I used this against him in Leon and Frankfurt. Against Bareev, I didn't get much from the opening, so in Sydney I deviated with 4.Bg5, but now it's time to return to "our" main line!} c5 6. f4 ({Against} 6. c3 cxd4 7. cxd4 f6 {Black tried to blast White's centre immediately. White can play 8.f4, but this contains a lot of danger for White.}) 6... Nc6 {Fairly quickly. Black can go for 6... cxd4, but Alexei had an improvement in mind over our game in Frankfurt.} 7. c3 Qb6 8. Nf3 f6 {He played 8... Be7 in Frankfurt, but we transpose anyway.} 9. a3 Be7 10. h4 O-O 11. Rh3 a5 $1 (11... Na5 $2 12. b4 cxb4 13. axb4 Nc4 14. Ng3 $16 {Anand-Shirov Frankfurt 2000}) 12. b3 Qc7 {There are two game with 12... Qd8, but this move looks much better. For a start, there are possiblities of Qc3+ in some line...} 13. Neg1 a4 $2 {There is no need for this.} (13... b6 14. Be3 (14. Bd3 cxd4 15. cxd4 (15. Bxh7+ $2 Kxh7 16. Ng5+ fxg5 17. hxg5+ Kg8 18. Qh5 Ndxe5 19. fxe5 Qxe5+ 20. Ne2 Ba6) 15... fxe5 16. fxe5 Nxd4 (16... Ncxe5)) 14... Ba6 15. Bxa6 Rxa6 {This looks about equal.}) 14. b4 fxe5 15. fxe5 Ndxe5 {In this position, such drastic measures are simply necessary. If White can consolidate his centre, then his kingside attack will be overwhelming.} (15... cxd4 16. cxd4 Ndxe5 17. dxe5 Nxe5 18. Bb2 $16) 16. dxe5 Nxe5 17. Nxe5 $1 {The best move. White's two knights would keep tripping on each other, so it's useful to exchange one of them.} Qxe5+ 18. Qe2 Bxh4+ $2 {He played this quite fast, but it's an error.} (18... Qc7 $1 {Black now follows with e5 which should give him some play. Also, White's king isn't going to be completely safe on the queenside either.}) 19. Kd1 $1 {Now Black has to exchange queens.} Qf6 $2 (19... Qxe2+ 20. Bxe2 Bf2 21. Be3 e5 22. Bxf2 Rxf2 23. Rg3 {I think White has a comfortable edge in the ending. This reminds me of the ending in the Slav, where White is a piece up (1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4). Here Black's centre is too loose.}) 20. Nf3 $1 Qxc3 $6 (20... g5 21. Nxh4 Qxf1+ 22. Qxf1 Rxf1+ 23. Ke2 Rxc1 24. Rxc1 gxh4 25. Rxh4 $16 {White's rooks have all the open files they need!}) 21. Bb2 {Now White wins a second piece.} Qb3+ 22. Kc1 e5 {The only move - otherwise Ne5 wins the queen.} 23. Rxh4 {Obviously a pleasant choice - to win a queen or be two pieces up. I saw that I could swap queens and go into an ending and decided not to bother with the alternative. Still, taking the queen would have finished it earlier.} (23. Nd2 Bxh3 24. Nxb3 Rf2 (24... Bg4 25. Qxg4 Rxf1+ 26. Kc2 axb3+ 27. Kxb3 c4+ 28. Ka2 $18 {White just collects all the pawns.}) 25. Qb5 (25. Qd1 Bg5+ 26. Kb1 Bf5+ 27. Bd3 e4 28. Bc2 axb3 29. Qxd5+ Kh8 30. Qxb3 $18) 25... Bg5+ 26. Kb1 Bf5+ 27. Bd3 axb3 28. Bxf5 Rxf5 29. bxc5 $18) 23... Bf5 24. Qd1 e4 25. Qxb3 axb3 26. Nd2 {Harvesting all these pawns is going to take a while, but basically the evaluation of the position is clear - White is winning.} e3 (26... c4 27. Bd4 $18) 27. Nf3 (27. Nxb3 Bg6 28. Be2 Rf2 29. Kd1 Rxg2 30. Rg4 $18) 27... Rae8 28. Kd1 (28. bxc5 e2 29. Kd2 exf1=Q 30. Rxf1 {Wins as well, but there is no reason to return material.}) 28... c4 29. Be2 Be4 30. Kc1 Re6 31. Bc3 Rg6 32. Rh2 Bd3 33. Bxd3 cxd3 34. Kb2 d2 35. Kxb3 ( 35. Rd1 {Followed by Bxd2 just finishes it.}) 35... Rg3 36. Kb2 {Yes, Kc2 is quicker. I guess I was getting nervous!} g5 37. Kc2 Rc8 (37... g4 38. Nd4 (38. Be5 gxf3 39. Bxg3 f2 40. Rh4 Rf5 41. Rg4+ Kf7 42. Bxf2 Rxf2 43. Kd3 $18) 38... Rf2 39. Rd1 e2 40. Nxe2 Rxe2 41. Rxd2 $18) 38. Kd3 g4 39. Be5 Rc1 40. Rh1 Rxg2 41. Nh4 {I played this and left the stage. When I came back Alexei graciously congratulated me on becoming World Champion!} (41. Nd4 $4 {There is one last trick in the position} d1=Q+ $1 42. Rxd1 Rd2+ $1) 1-0

[Event "Karlsbad"] [Site "Karlsbad"] [Date "1911.09.09"] [Round "15"] [White "Nimzowitsch, Aaron"] [Black "Salwe, Georg"] [Result "1-0"] [ECO "C02"] [Annotator "ChessBase"] [PlyCount "77"] [EventDate "1911.08.21"] [EventType "tourn"] [EventRounds "25"] [EventCountry "CZE"] [Source "ChessBase"] [SourceDate "1999.07.01"] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7 $6 7. dxc5 $5 Bxc5 8. O-O f6 $2 {Black hopes, that after the exchange of the e5-pawn he can free his pieces (cf. Bd7) by playing e6-e5. White tries to hold the e5 point, he occupies the center.} (8... a5 $142) (8... Nge7 $4 9. b4 $18) 9. b4 $1 {Good strategy! 1.The b-pawn is protected. 2.He is winning the control over the dark squares (c5, d4, e5).} Be7 10. Bf4 {Overprotection of e5. Überdeckung des Punktes e5.} fxe5 11. Nxe5 Nxe5 12. Bxe5 {Nimzowitsch: "...the new blockader, the Be5, turns out to be an extremely tough character.'' Nimzowitsch: ,,... der neue Blockeur Be5 erweist sich als ein äußerst zäher Geselle.''} Nf6 (12... Bf6 $2 {Tries to exchange the blockader.} 13. Qh5+ g6 14. Bxg6+ hxg6 15. Qxg6+ Ke7 16. Bxf6+ Nxf6 17. Qg7+ $18) 13. Nd2 {Nimzowitsch: "The blockading force is to be reinforced by the knight." ,,Die Blockadetruppen sollen durch den Springer verstärkt werden."} (13. Qc2 $2 O-O $1 14. Bxf6 Rxf6 15. Bxh7+ Kh8 16. Bg6 e5 $1 $19 {Nimzowitsch: By sacrificing a pawn Black has succeded in freeing his centre pawn for e6-e5. Black has a pawn centre and very active pieces now.}) 13... O-O 14. Nf3 Bd6 (14... Bb5 $2 15. Bd4 Qa6 16. Bxb5 Qxb5 17. Ng5 $1 {winning a pawn. mit Bauerngewinn.}) 15. Qe2 (15. Bd4 $2 {Tactical mistake, now Black can win the fight for the e5-square.} Qc7 16. Qe2 Ng4 $1 17. h3 e5 $1 {done!}) 15... Rac8 16. Bd4 Qc7 17. Ne5 {Nimzowitsch: "Now the immobility of the blockade pawns is greater than ever..." Now White occupies both central squares. "Nun ist die Unbeweglichkeit der blockierten Bauern größer denn je....''} Be8 {QUESTION: What can you do, if you have won the control in the centre?} 18. Rae1 {What is he doing?} Bxe5 19. Bxe5 Qc6 20. Bd4 Bd7 21. Qc2 {Starting to regroup, in order to follow the rule of thumb: exploit your advantage in the centre to mount an attack on the wing, in this case an attack on the king (against h7 and g7). ANSWER: START AN ATTACK ON THE WING! Beginn einer Umgruppierung, die wie die Merkregel besagt, den Zentrumsvorteil zum Flankenangriff, hier zum Königsangriff (gegen h7 und g7), ausnutzt.} Rf7 22. Re3 $1 {He is going the kingside in order to attack the black king.} b6 23. Rg3 Kh8 24. Bxh7 $1 $16 e5 $5 (24... Nxh7 25. Qg6 $1 $18 (25. Rh3 $2 Rf5 26. g4 e5 $1 27. Bxe5 (27. gxf5 exd4 28. f6 $2 Bxh3 {plong} ) 27... Qg6 $1)) 25. Bg6 Re7 26. Re1 Qd6 27. Be3 d4 28. Bg5 Rxc3 29. Rxc3 dxc3 30. Qxc3 Kg8 31. a3 Kf8 32. Bh4 Be8 33. Bf5 Qd4 34. Qxd4 exd4 35. Rxe7 Kxe7 36. Bd3 Kd6 37. Bxf6 gxf6 38. Kf1 Bc6 39. h4 1-0

Flokkur: Spil og leikir | Breytt s.d. kl. 00:19 | Facebook

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Skákfélag Akureyrar

Skákfélag Akureyrar var stofnað 10. febrúar árið 1919 og er meðal elstu félaga á Akureyri.

Félagið hefur nú aðstöðu til bráðabirgða í Rósenborg - neðstu hæð, en Skákheimilið í Íþróttahöllinni er lokað eins og er vegna endurbóta.

Áskell Örn Kárason er formaður félagsins.

Netfang formanns er askell@simnet.is og þangað má koma upplýsingum og ábendingum um efni á heimasíðuna..

Skákfélag Akureyrar

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Skákfélag Akureyrar