www.arves.org - Maroc Echecs 10th 2020

Studies preliminary awarded for the 10th Maroc Echecs 2020 tournament:

[Event "1st prize, 10th Maroc Echecs 2020"] [Site ""] [Date "2020"] [Round ""] [White "Luis Miguel Gonzalez"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "1R6/7k/1KP2n2/3P1p2/8/7p/8/n7 w - - 0 1"] [PlyCount "37"] [EventDate "2020"] 
 1. d6 $1 ({Thematic try} 1. Kc5 $2 h2 $1 2. Rb1 Nb3+ $1 3. Kd6 Kg6 $1 4. c7 Ne8+ 5. Kd7 Nxc7 6. Kxc7 Nd4 $1 7. Rh1 f4 $1 8. Rxh2 Kf5 $1 9. Rb2 $1 Ke5 $1 10. d6 Ne6+ 11. Kd7 Nd4 $1 12. Ra2 $1 f3 $1 13. Ra5+ Kf4 $1 14. Ke8 Nc6 $1 15. d7 Nxa5 $1 16. d8=Q f2 $11) (1. Kc7 $2 Nc2 2. Rb3 Nxd5+ 3. Kd6 Nce3 4. c7 Nxc7 $11) 1... h2 2. d7 $1 (2. Rb7+ $2 Kg6 $1 3. d7 h1=Q 4. d8=Q Nb3 $11) 2... Nxd7+ $1 (2... h1=Q 3. d8=Q Kg6 4. Qd3 $1 Qg1+ 5. Ka6 Qc5 6. Qg3+ Kf7 7. Rb7+ Ke6 8. Qe1+ Ne4 9. Qxa1 Nd6 10. Qa4 Nxb7 11. Kxb7 $18) 3. cxd7 h1=Q 4. Rb7 $1 (4. d8=Q $2 Qb1+ 5. Ka6 Qa2+ 6. Qa5 Qxa5+ 7. Kxa5 Nc2 $1 $11) 4... Qh6+ $1 5. Ka7 $1 (5. Kb5 $2 Qg7 $1 $11) 5... Qe3+ 6. Ka8 $1 (6. Kb8 $2 Qe5+ 7. Kc8 Qe6 $1 $11) 6... Qa3+ 7. Ra7 Qf3+ 8. Kb8 Qg3+ 9. Rc7 $1 (9. Kc8 $2 Qe3 10. Rb7 Qe6 $1 $11) 9... Qg8+ $1 (9... Qb3+ 10. Rb7 Qg8+ 11. d8=Q+ {transposes to the main line}) 10. d8=Q+ Kh8 11. Kc8 $1 (11. Qxg8+ $2 Kxg8 12. Rc3 Kf7 $1 13. Kc7 Ke6 14. Kc6 Ke5 15. Kc5 Ke4 16. Kc4 f4 $11) 11... Nb3 $1 (11... f4 12. Rc3 $1 $18) 12. Rf7 $3 Qxd8+ 13. Kxd8 Nd2 $1 (13... Nd4 14. Ke7 Kg8 15. Kf6 $1 f4 16. Rg7+ Kf8 17. Rd7 Nc6 18. Rd6 $18) 14. Ke7 $1 (14. Ke8 $2 Kg8 $1 15. Ke7 Ne4 $1 16. Rxf5 Kg7 17. Re5 Nd2 $1 18. Re3 Kg6 19. Ke6 Kg5 $11) 14... Ne4 $1 (14... Kg8 15. Rxf5 Kg7 16. Rf4 Kg6 17. Ke6 Kg5 18. Ke5 $18 {and White traps the Knight}) 15. Kf8 $1 ( 15. Rxf5 $2 Kg7 $1 $11) 15... Ng3 16. Rg7 $1 f4 17. Kf7 $1 Nh5 (17... Nf5 18. Rg5 Nd6+ 19. Ke6 Ne4 20. Rg4 Kh7 21. Rxf4 $18) 18. Rg5 Ng3 19. Rg4 1-0

[Event "2nd HM, 10th Maroc Echecs 2020"] [Site ""] [Date ""] [Round ""] [White "Pyotr Kiryakov & Pavel Arestov"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/4R3/1P6/8/2k5/P3K3/P6q/8 w - - 0 1"] [PlyCount "24"] [TimeControl "600"] 
 1. b7 (1. Re4+ Kd5 $1 2. Rb4 (2. Rd4+) 2... Qxa2 3. b7 Qxa3+) 1... Kd5 (1... Kc5 2. Re4 {=}) (1... Qg3+ 2. Ke2 Kd4 3. a4 Kc5 4. a5 $1 {=}) 2. Rh7 $1 (2. a4 Kc5 (2... Kc6) 3. a5 Kb5) (2. Kd3 Kc6 3. Kc3 Kb6) 2... Qe5+ (2... Qg3+ 3. Kd2 Kc6 4. Kc2 Kb6 5. Rh3 $1 {= see the main line}) (2... Qb2 3. a4 $1 Kc6 4. a5 $1 {= black king cannot cross the \"b\"-file here to reach xa7}) 3. Kd3 Kc6 4. Kc2 Kb6 5. Rh3 Qe2+ 6. Kb1 Qd1+ 7. Kb2 Qd2+ 8. Kb1 Kxb7 9. Rb3+ $1 Ka6 (9... Kc6 10. a4 $1 {= reaching the well-known fortress with Rook and p.a3 against Queen. For example,} Qd1+ 11. Kb2 Qd4+ 12. Kb1 Qxa4 13. Kb2 Qd4+ 14. Kb1 Kc5 15. a3 $1 {=}) 10. Rb4 Ka5 11. Rb3 Ka4 12. Rc3 $1 {positional draw, fortress} Qxc3 {= Stalemate} (12... Kb5 13. Rc2 {=} (13. Rc1 {=}) (13. Rc8 {=})) 1/2-1/2

[Event "3rd Commendation, 10th Maroc Echecs 2020"] [Site ""] [Date "2020.05.28"] [Round ""] [White "Rainer Staudte"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "7k/7B/8/7N/7P/b7/p7/K7 w - - 0 1"] [PlyCount "21"] [EventDate "2020"] 
 1. Bf5 {Avoids the obstruction of the white king's way to the happeness and prepares a decisive chess for the final guidance of the black king.} (1. Bc2 $2 Bd6 $1 2. Kxa2 Be5 $1 3. Kb3 Kg8 4. Kc4 Kf7 5. Kd5 Bf6 $1 6. Nxf6 Kxf6 $11) (1. Bd3 $2 Bd6 $1 2. Kxa2 Be5 $1 3. Kb3 Kg8 4. Kc4 Kf7 5. Kd5 Bf6 $1 6. Nxf6 Kxf6 $11) (1. Be4 $2 Bd6 $1 2. Kxa2 Be5 $1 3. Kb3 Kg8 4. Kc4 Kf7 5. Kd5 Bf6 $1 6. Nxf6 Kxf6 $11) 1... Bd6 {Catches the knight.} (1... Be7 2. Nf4 Bf6+ 3. Kxa2 Bxh4 4. Ng6+) 2. Kxa2 {Threats to escape via f6.} Be5 3. Kb3 {Tries to control f6.} Kg8 4. Kc4 Kf7 {f6 is save, but ...} 5. Kd5 Bc7 {threats Bd8} (5... Bf6 { Threats Bxh5 but blocks f6. The following moves are these of the main line.} 6. Be6+ $1 (6. Nxf6 $2 Kxf6 $11) 6... Kg6 7. Nf4+ $1 (7. Ng3 $2 Bxh4 $11 (7... Kh6 8. h5 Bh4 $1 $11)) 7... Kh6 8. Ng2 $1 (8. h5 $2 Bg5 $1 9. Ne2 Kxh5 $11) 8... Kh5 9. Bf7+ $1 Kg4 10. h5) 6. Bd7 $1 {disarms Kg6} (6. Bg4 $5 {does not make progress} Bh2 {or Bb8 (waiting move)} 7. Bd1 {or Be2 or Bf3} Bc7 8. Bg4) 6... Bd8 {threats Bxh5} (6... Kg6 7. Be8+ $1) 7. Be6+ {Keeps the black king busy.} Kg6 8. Nf4+ Kh6 9. Ng2 $1 {guards the pawn from safe distance} (9. h5 $2 { premarurely} Bc7 {or Bg5} 10. Nd3 Kxh5 {draw}) 9... Kh5 {threats Bxh5} 10. Bf7+ Kg4 {Tries to attack the knight.} 11. h5 {Releases the knight.} 1-0