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middlegame: Positional Pawn Sacrifice Pawn sacs for initiative, tempo, open up diagonals, enable manoeuvering, free squares pattern recognition: http://www.youtube.com/watch?v=bv93... [Event "Golden Sands Europe op 2nd"] [Date "2013.06.12"] [Round "3"] [White "Sagar, Shah"] [Black "Sofranov, Velizar"] [Result "1-0"] [ECO "E69"] [WhiteElo "2359"] [BlackElo "2154"] [PlyCount "53"] 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Nc3 e5 8. e4 Re8 9. h3 exd4 10. Nxd4 Nc5 11. Re1 c6 12. Qc2 a5 13. Be3 a4 14. Rad1 Qa5 15. f4 h5 16. Bf2 Nfd7 17. a3 Bh6 18. Nf3 Bf8 19. e5 dxe5 20. f5 Kg7 21. Nh4 g5 22. f6+ Nxf6 23. Nf5+ Kg8 24. Nd6 Bd7 25. Nxe8 Rxe8 26. Qd2 Ne6 27. Ne4 1-0 click for larger view <19.e5!> 27 games, 1936-2016 Middlegame: Queenless middlegames Queenless middlegames - where the ♕s will be traded-off as 1st or 2nd pair of pieces until move 15. <1.e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8> click for larger view Berlin Wall (C67) Opening Explorer (1,734 games, and counting) --> Game Collection: BAPAK-BAPAK ! and others... ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 > click for larger view E92: King's Indian Defense: Exchange Variation Opening Explorer (555 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8> click for larger view B07: Pirc Defense, General Opening Explorer (543 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. dxc5 Qxd1 8. Rxd1 Bxc5 > click for larger view D27: Queen's Gambit Accepted, Classical Opening Explorer (291 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 > click for larger view C68: Ruy Lopez, Exchange Opening Explorer (244 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Qxe2+ 8. Bxe2 Be7 9. Nc3 > click for larger view C42 Russian Game: Cozio (Lasker) Attack Opening Explorer (233 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5 8.Qxd8+ Kxd8> click for larger view D27: Queen's Gambit Accepted, Classical Opening Explorer (225 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 Bg4 7. dxe5 Qxd1 8. Rxd1 fxe5 > click for larger view C69: Ruy Lopez, Exchange, Gligoric Variation, 6.d4 Opening Explorer (200 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1.Nf3 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.dxc3 Qxd1+ 7.Kxd1> click for larger view A 14 English Opening: Anglo-Indian Defense. King's Indian Formation Opening Explorer (175 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 > click for larger view Rat Defense: English Rat (A41) Opening Explorer (132 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Be3 Qa5 9. Qd2 Nc6 10. Rc1 cxd4 11. cxd4 Qxd2+ 12. Kxd2 > click for larger view Gruenfeld Defense: Exchange. Modern Exchange Variation (D85) Opening Explorer (107 games, probably more due to transpositions or similar move orders) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ <1. Nf3 c5 2. c4 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc6 6. d4 cxd4 7. Nxd4 Ndb4 8. Nxc6 Qxd1+ 9. Kxd1 Nxc6 > click for larger view A15: English / A04: Reti Opening Opening Explorer (49 games) ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♖ ♘ ♗ _ ♔ ♗ ♘ ♖ ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ Other, rare lines # <1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 Bb4+ 5. Nc3 exd4 6. Qxd4 Qxd4 7. Nxd4 > (24 games) # <1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 e5 6. dxe5 dxe5 7. Qxd8+ Kxd8 > (23 games) # <1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 > (23 games) # <1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. Bh4 c5 7. cxd5 Nxc3 8. bxc3 Qxd5 9. e3 Nc6 10. Be2 cxd4 11. cxd4 e5 12. dxe5 Qa5+ 13. Qd2 Qxd2+ 14. Kxd2 > (18 games) # <1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 7. O-O e5 8. dxe5 dxe5 9. Qxd8 Rxd8 > (17 games) # <1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Bb5+ Nc6 6. Qe2+ Qe7 7. dxc5 Qxe2+ 8. Nxe2 Bxc5 > (17 games) # <1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 Nc6 8. Bb5 dxe4 9. Qxd8 Kxd8> (15 games) # <1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6 8.Qxd8+ Rxd8> (13 games) # <1. e4 d5 2. d3 dxe4 3. dxe4 Qxd1+ 4. Kxd1 > (10 games) # <1. d4 Nf6 2. c4 Nc6 3. Nf3 d6 4. Nc3 e5 5. dxe5 Nxe5 6. Nxe5 dxe5 7. Qxd8+ Kxd8 > (7 games) # <1. d4 d5 2. c4 Nc6 3. e3 e5 4. dxe5 d4 5. exd4 Qxd4 6. Qxd4 Nxd4 > (6 games) # <1. d4 Nf6 2. c4 g6 3. Bg5 Bg7 4. Nc3 d6 5. e4 O-O 6. Be2 c5 7. dxc5 dxc5 8. Qxd8 Rxd8 > (6 games) # <1. c4 e5 2. g3 g6 3. d4 d6 4. dxe5 dxe5 5. Qxd8+ Kxd8> (5 games) # <1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 d6 5.dxe5 dxe5 6. Qxd8+ Kxd8> (5 games) # <1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Na4 e5 6. dxe5 Nc6 7. a3 Nxe5 8. e4 Nb6 9. Qxd8+ Kxd8> (3 games) # <1. d4 d5 2. c4 Nc6 3. e3 e5 4. dxe5 dxc4 5. Qxd8+ Kxd8 6. Bxc4 Nxe5 > (2 games) # <1.c4 g6 2.d4 Nf6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Be2 dxc4 7.Bxc4 c5 8.d5 e6 9.dxe6 Qxd1+ 10.Kxd1> (2 games) # <1. e4 e5 2. Nf3 Nc6 3. d3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O d5 7. Nbd2 Be6 8. Qe2 dxe4 9. dxe4 Qd7 10. c3 Rad8 11. Nc4 Bxc4 12. Qxc4 Qd3 13. Qxd3 Rxd3> (1 game) Keene vs R Byrne, 1964 82 games, 1894-2017 middlegame: Sacs on g7 (or g2) The sacrifice at g7 or g2 is intended to demolish the opponent's King-side pawn structure, setting up possible mating attacks, decisive win of material or won endgame positions. Sacrifice Explorer (Bxg7) Sacrifice Explorer (Bxg2) check also Game Collection: Demolition of Pawn Structure: Sac on g7 (g2) F Urkedal vs I Sokolov, 2017 <18.Rxg7+!!> is like a bold out of the blue that breaks up the pawn shield in front of the ♔. click for larger view If 18...Kxg7 19.Qg2+ Kh8 20.Qg5! Rg8 21.Bxf6+ Qxf6 22.Qxf6+ Rg7 23.f5 click for larger view 76 games, 1899-2019 Middlegame: Sometimes it is better not to castle 9 games, 1922-2002 Middlegame: White's Hanging Pawns Like the isolani, the <hanging pawns> are a structural weakness and must not be entered into unless the piece position offers some compensation. The play revolves around Black trying to force one of the pawns to advance. If Black can establish a permanent blockade the game is positionally won. On the other hand, White aims to keep the pawns hanging, trying to generate a kingside attack leveraging off of their superior center control. Other themes for White include tactical possibilities and line opening breaks in the center. http://en.wikipedia.org/wiki/Pawn_s... ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ "A pair of pawns on adjacent files that are separated from all other pawns are known as "Hanging Pawns" (a term coined by Steinitz). Hanging pawns possess strengths and weaknesses. The elements of strength include the possibility of opening files through their advance and with this comes an increase in space, and the possibility of controlling key squares that can be used as outposts for Knights and Bishops. On the other hand they can also be weak. They can only be defended by pieces. This vulnerability can be exploited by attacking them with pieces, forcing the opponent to protect them with pieces. The defending pieces can then be attacked and exchanged at a suitable moment and this can often result in the win of a pawn or forcing another pawn weakness elsewhere. They can also be weakened by forcing the advance of one of them leaving the other one backward and a hole into which a piece can be placed. A third way of exploiting their weakness is to attack them with a pawn of your own, this can force a pawn exchange that results in an isolated pawn. The current view is that hanging pawns are weak if their side is behind in development but strong if their side is ahead in development." by User: Benzol , Game Collection: Hanging Pawns ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ - ♙♙ 34 games, 1886-2018 Mitrofanov's Deflections Games from the book Mitrofanov's Deflection by ICCF International Master Victor Charushin 11 games, 1896-1996 Novotny, Plachutta and other interferences 11 games, 1910-2012 Off side defenders don't defend. 1 game, 2013 oops - relocating a needed defender 10 games, 1989-2016 PASSED PAWN VERSUS KNIGHT TRICK, AN ALEKHINE FAV 9 games, 1922-2016 PASSED PAWN VERSUS ROOK TRICK: ADJ FILE -Whenever- you see an enemy rook on a <FILE ADJACENT> to your <ADVANCED PASSED PAWN> (White a7-rook, Black b3-passer in R Bertholee vs J Polgar, 1990 below), you should be thinking about this tactical trick. --- R Bertholee vs J Polgar, 1990 <syracrophy: After 35.Rxa7 it makes a perfect Wednesday puzzle (Black to play 35...?)> Black to play: 35 ... ? click for larger view What does Black want to play in this position? Place the Black d4-rook behind the passed Black b3-pawn and promote it, right? So that is exactly what GM Judit Polgar does! With 35 ... ♖d4-b4!!. Position after 35 ... ♖d4-b4!!-+ click for larger view The point is that Polgar is using the old <PASSED PAWN VERSUS ROOK TRICK> to promote her passed Black b3-pawn after 36 a3x♖b4 b3-b2. Position after 36 a3x♖b4 b3-b2-+ click for larger view What a <TACTICAL MONSTER> GM Judit Polgar is! --- 17 games, 1938-2014 Petrosian sacs the exchange Petrosian games teach you the value of passed pawns and what an exchange is really worth. - NotYetAGm 32 games, 1945-1983 Predict-a-move: turning a threat into a blunder 6 games, 1929-2009 pure queen sacrifices 71 games, 1885-2017 Q versus Q almost always means OVERLOADED I realized the basic tactial principle <<<Q versus Q almost always means OVERLOADED>>> by solving several <FORK-OVERLOAD TRICKS> and then seeing Nicholas-Bisquier MCC 2008 in which the <LOOSE> Black c5-queen after ... ♕e7-c5?? dropped off to ♘f5xg7+! as the Black f8-bishop was now <OVERLOADED>, having to <DEFEND> both the Black c5-queen *and* the g7-checking square. 3 games, 1990-2008 Q vs 3 minor pieces Endgames 3 games, 1959-2013 Q vs 3 pieces Very dynamic games 2 games, 1977-2013 Queen and knight attacking the king 5 games, 1895-2009 queen sacrifice for two minor pieces 6 games, 1958-2017 RELOADING EXPLAINED 3 games, 1999-2004

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