www.arves.org - ChessStar 2020

Studies prvisinally awarde for the Internet magazine ChessStar 2020 tournament.

Section Win, A.1. Up to 10 pieces

[Event "sp.p. ChessStar 2020 Sec. A.1."] [Date "2020"] [White "Luis Miguel Gonzalez"] [Result "1-0"] [FEN "r3k3/6PP/4KP2/8/8/8/3p4/4nR2 b q - 0 1"] 
 1... O-O-O $1 2. h8=Q $1 ({or} 2. h8=R $2) (2. g8=Q $2 d1=Q 3. Qxd8+ Qxd8 4. f7 Qd7+ $13) 2... d1=Q 3. Qxd8+ $1 Qxd8 4. f7 $1 (4. Rxe1 $2 Qe8+ 5. Kf5 Qh5+ 6. Ke6 Qe8+ $11) 4... Qd7+ 5. Kf6 Qd6+ 6. Kg5 $1 Qg3+ 7. Kh6 Qh4+ 8. Kg6 Qe4+ 9. Kg5 $1 (9. Rf5 $5 Qg4+ 10. Kf6 Qh4+ 11. Rg5 Qh6+ $11) 9... Qg2+ 10. Kh6 Qh3+ 11. Kg6 Qd3+ 12. Rf5 $1 Qg3+ 13. Kh7 $1 Qh3+ 14. Kg8 Qb3 15. Rb5 $1 ({ Thematic Try:} 15. Rf1 $2 Ng2 $1 16. Rf3 $1 Qd5 $1 17. Rf5 $1 Qb3 $1 18. Rb5 $1 Qxb5 19. f8=Q+ Kd7 $1 20. Qf7+ Kd8 $1 21. Qf6+ Kd7 22. Qg6 Ke7 $1 23. Kh7 Nf4 $1 24. Qe4+ Ne6 25. Qh4+ Ng5+ $11) 15... Qe6 $1 (15... Qxb5 16. f8=Q+ Kd7 17. Qf4 $1 Ng2 18. Qg4+ Ke7 19. Kh7 Qb1+ 20. Qg6 Qh1+ 21. Qh6 Qb1+ 22. Kh8 Qa1 23. Qg5+ Kf7 24. Qd5+ Ke7 25. Qxg2 $18) 16. Rb6 $1 (16. Rb1 $2 Nd3 $1 17. Rb6 Qc4 $1 18. Rc6+ Qxc6 19. f8=Q+ Kc7 $11) (16. Re5 $2 Qxe5 17. f8=Q+ Kc7 $11) 16... Qa2 $1 (16... Qd5 17. Rd6 Qb3 18. Kf8 $1 Kc7 19. g8=Q Kxd6 20. Qg5 $18) (16... Qc4 17. Rc6+ Qxc6 18. f8=Q+ $18) 17. Rb2 $1 (17. Rf6 $2 Kd7 $1 18. Kh7 Qc2+ 19. Rg6 Nf3 $3 20. f8=N+ (20. g8=Q Ng5+ 21. Kh6 Qh2+ 22. Kxg5 Qd2+ $1 23. Kh5 Qh2+ $11) 20... Ke7 21. g8=Q Ng5+ 22. Kg7 Qc3+ 23. Kh6 Nf7+ 24. Kh7 Qh3+ 25. Kg7 Qc3+ $11) (17. Kf8 $2 Qa3+ 18. Ke8 Qe3+ 19. Kf8 Qa3+ 20. Kg8 Qa2 { is a loss of time}) 17... Qd5 18. Rd2 $1 (18. Rb1 $2 Ng2 $1 19. Rd1 $1 Qb3 $1 20. Rd3 Qxd3 $1 21. f8=Q+ Kd7 $1 22. Qf7+ Kd8 23. Qh5 Ne3 $1 24. Kh8 Qd4 25. Kh7 Qe4+ 26. Qg6 Qh4+ $11) 18... Qb3 $1 (18... Qc4 19. Re2 Nf3 20. Rc2 $1 Qxc2 21. f8=Q+ $18) 19. Re2 $1 (19. Kf8 $2 Kc7 20. g8=Q Qb4+ 21. Kg7 Qc3+ $1 22. Kh6 Qh3+ 23. Kg6 Qg4+ $11) 19... Nf3 $1 (19... Nd3 20. Re3 $1 Kd7 21. Rxd3+ Qxd3 22. f8=Q $18) 20. Rb2 $1 (20. Re3 $2 Qxe3 $1 21. f8=Q+ Kb7 22. Qb4+ Kc6 $1 $11) 20... Qe6 $1 21. Rb6 $1 (21. Re2 $2 Qd5 $1 $11) 21... Qa2 22. Ra6 $1 Qd5 $1 23. Ra5 $1 Qe6 24. Rf5 $1 Nd4 $1 25. Rf6 $1 Qb3 $1 26. Kh7 $1 Qh3+ 27. Rh6 Qf5+ 28. Kg8 Qd5 29. Rd6 $1 Qxd6 30. f8=Q+ $18 1-0

Section Win, A.2. More of the 10 pieces

[Event "1.p. ChessStar 2020 Sec. A.2."] [Date "2020"] [White "Sergey Osintsev"] [Result "1-0"] [FEN "8/K7/5B2/kp1pp3/3p3R/N5R1/3Pp3/3nr1r1 w - - 0 1"] 
 1. Nc4+ $1 Kb4 {[%emt 0:00:00]} (1... dxc4 2. Ra3+ Kb4 3. Be7#) (1... bxc4 2. Ra3+ Kb5 3. Rh7 c3 4. d3 Kb4 5. Be7+ Kb5 6. Rh6 c2 7. Rb6#) 2. Ra3 $1 Rg7+ $1 ( 2... Kxc4 3. d3+ Kb4 4. Be7#) (2... bxc4 3. Be7+ Kb5 4. Rh6 c3 5. d3 Rg7 6. Rb6#) (2... Ref1 3. Be7+ Kxc4 4. d3#) (2... dxc4 3. Be7#) (2... Nb2 3. Be7+ Kxc4 4. Rc3#) (2... Rg3 3. Rxg3 Rf1 4. Nxe5 $1 Rxf6 5. Rxd4+ Kc5 6. Rh4 $1 Rf7+ 7. Ka6 Rf6+ 8. Ka5 Kd6 9. Nd3 Nb2 $1 10. Ne1 Rf1 11. Rh6+ Kc5 12. d4+ Kxd4 13. Nc2+ Kc5 14. Re6 $18) (2... e4 3. Be7+ Kxc4 4. d3+ exd3 5. Rh6 b4 6. Rc6+ Kb5 7. Rc5#) 3. Bxg7 Rf1 4. Bxe5 Rf7+ (4... Kxc4 5. Kb6 $18) (4... bxc4 5. Bd6+ Kb5 6. Rh7 e1=Q 7. Rb7+ Kc6 8. Ra6#) 5. Kb6 Rd7 6. Bxd4 Rb7+ $1 7. Kc6 $1 (7. Kxb7 $2 e1=Q 8. Bc3+ Nxc3 9. Ne3+ Qxh4 10. Nc2+ Kc5 11. Rxc3+ Kd6 $11) 7... Rc7+ 8. Kxc7 e1=Q 9. Bc3+ $1 (9. Kd6 $2 bxc4 $1 10. Bc5+ Kb5 11. Rh8 c3 $1 12. Rb3+ Kc4 13. Rb4+ Kd3 14. Rd4+ Kc2 $11) 9... Nxc3 (9... Kc5 10. d4+ $18) 10. Ne3+ $1 ( 10. dxc3+ $2 Kc5 $11) 10... Qxh4 (10... Kxa3 11. Nc2+ Kb2 12. Nxe1 $18) 11. Nc2+ Kc5 (11... Kc4 12. Rxc3#) 12. Rxc3+ Qc4 13. d4# 1-0

[Event "4.p. ChessStar 2020 Sec. A.2."] [Date "2020"] [White "Peter Krug and Pavel Arestov"] [Result "1-0"] [FEN "5k2/5n2/2P4R/3P4/4Prn1/3R4/6P1/7K w - - 0 1"] 
 1. Rf3 $1 (1. Rh8+ $2 Kg7 2. Rf3 Rxe4 3. Rxf7+ Kxf7 4. g3 Re8 5. Rh7+ Kg6 (5... Kg8) 6. Rh4 (6. d6) (6. Rh4) (6. d6 Kxh7 7. d7) 6... Kf5 (6... Kg5) 7. c7 Nf6 ( 7... Nf6 8. d6 Ke6 9. Rh6 Kxd6 10. Rxf6+ Kxc7) (7... Rc8 8. d6 Ne5 9. Rh5+ Ke6 10. Rxe5+ Kxd6) 8. d6 Ke5 $11 (8... Ke6)) 1... Rxf3 (1... Rxe4 2. Re6 Rc4 (2... Rb4) 3. Rf1 $18) 2. Rh8+ $1 (2. gxf3 $2 Ngxh6 $1 3. c7 Nd6 4. e5 Nc8 $11) 2... Nxh8 3. gxf3 Nf2+ (3... Ke7 4. fxg4 $18) 4. Kg1 $3 (4. Kg2 $2 Nxe4 5. fxe4 Ke7 $1 6. Kf3 Kd6 7. Ke3 Ng6 8. Kd4 Nf4 $1 9. e5+ {(Kc4)} Kc7 10. e6 Kd6 $11) 4... Nxe4 5. fxe4 Ke8 $1 (5... Ke7 6. e5 Ng6 7. d6+ Ke6 8. c7 Kd7 {(Nxe5)} 9. e6+ $18) 6. Kf2 $1 (6. e5 $2 Ng6 $1 7. d6 (7. e6 Ne7 $11 8. c7 Nc8 $11) 7... Nxe5 $18) 6... Nf7 7. Ke3 Ke7 8. Kd3 $1 (8. Kd4 $2 Kd6 $11 {zz}) 8... Kd6 9. Kd4 {zz } Ng5 (9... Ne5 10. c7 Kxc7 11. Kxe5 $18) 10. e5+ Kc7 11. Ke3 $1 (11. Kc5 $2 Ne4+ $11) 11... Nf7 12. Ke4 $1 (12. Kf4 $2 Nh6 $1 13. Kg5 Ng8 14. Kf5 Ne7+ 15. Ke6 Ng6 $1 16. Kf6 Nf4 $11) 12... Nh6 13. Kf4 Ng8 14. Kg5 Kb6 (14... Ne7 15. d6+ Kxc6 16. dxe7 Kd7 17. e8=Q+ Kxe8 18. Kf6 Kf8 19. e6 Ke8 20. e7 $18) 15. Kf5 (15. Kg6 $2 Ne7+ $11) 15... Kc7 (15... Ne7+ 16. Ke6 $18) 16. Ke6 Nh6 17. Ke7 $1 (17. d6+ $2 Kxc6 18. d7 Kc7 19. Ke7 Nf5+ $11) 17... Nf5+ 18. Kf8 Ne3 19. d6+ Kxc6 20. e6 Kxd6 21. e7 Nf5 22. e8=Q {excelsior, win} *

Section, Draw, Theme free.

[Event "sp.p. ChessStar 2020 Sec. Draw"] [Date "2020"] [White "Lubos Kekely and Michal Hlinka"] [Result "1/2-1/2"] [FEN "5N1k/1p6/5p1P/8/2q2pp1/P7/P2pP1PK/6RQ b - - 0 1"] 
 1... g3+ 2. Kh3 Qg8 (2... Qe4 3. Kg4 f3+ 4. Kxg3 fxe2 5. Kf2 $1 Qc2 6. Ng6+ Kh7 7. Nf8+ Kh8 8. Ng6+ $11) 3. Rf1 $1 (3. Rc1 $2 f5 4. Ng6+ Qxg6 5. Rc8+ Kh7 6. Rh8+ Kxh8 7. Qa1+ Kh7 $19) 3... d1=Q 4. Rxd1 f5 5. Ng6+ $1 Qxg6 6. Rd8+ Kh7 7. Rh8+ $1 Kxh8 8. Qa1+ { from the corner to the corner now with check - the longest diagonal is open} Kg8 9. Qg7+ Qxg7 10. hxg7 Kxg7 11. e3 $1 ({Try Th.:} 11. a4 $2 Kf6 12. e3 fxe3 13. Kxg3 Ke5 14. Kf3 Kd4 {compare with side line 15...Ke5} 15. Ke2 b6 16. g3 Ke4 17. a3 Kd4 $19) 11... fxe3 12. Kxg3 Kf6 13. Kf3 f4 14. g3 $1 fxg3 15. a4 $1 (15. Kxg3 $2 Ke5 16. Kf3 Kd4 17. Ke2 b5 18. a4 bxa4 19. a3 Ke4 $19) (15. Kxe3 $2 Kg5 16. Kf3 Kh4 17. Kg2 b5 18. a4 bxa4 19. a3 Kg4 20. Kg1 Kf3 $19) 15... Kf5 (15... Ke5 16. Kxe3 $11) (15... b6 16. Kxg3 Ke5 17. Kf3 Kd4 18. Ke2 $11) 16. a5 $1 g2 (16... Ke5 17. Kxe3 $11) 17. Kxg2 Ke4 18. Kf1 Kd3 19. Ke1 $11 { Sacrifices.} 1/2-1/2

[Event "sp.p. ChessStar 2020 Sec. Draw"] [Date "2020"] [White "Marco Campioli"] [Result "1/2-1/2"] [FEN "8/kBPPP3/b2PK3/8/4P3/1p2p3/2pp1p2/8 b - - 0 1"] 
 1... Bc4+ $1 (1... d1=Q 2. e8=Q Qg4+ 3. Ke5 Qg3+ 4. Ke6 Qh3+ 5. Ke5 Qh2+ 6. Ke6 Qh6+ 7. Ke5 Qg5+ 8. Ke6 Bxb7 9. Qb8+ Ka6 10. Qxb7+ Kxb7 11. c8=Q+ Ka7 12. Qc7+ Ka6 13. Qc6+ Ka5 14. Qc3+ $11) (1... f1=Q 2. e8=Q Qh3+ 3. Ke5) (1... c1=Q $2 2. e8=Q Bxb7 3. Qb8+ $18) 2. Bd5 $1 Bxd5+ $1 (2... d1=Q 3. e8=Q Qg4+ 4. Ke5 Qg7+ 5. Ke6 Qg4+ $11) (2... f1=Q 3. e8=Q Qh3+ 4. Ke5 $11) 3. exd5 (3. Kxd5 $2 d1=Q+ $19) 3... e2 $1 (3... f1=Q 4. e8=Q Qh3+ 5. Ke5 $11) 4. d8=Q $1 e1=Q+ 5. Kd7 (5. Kf7 $2 f1=Q+ $19) 5... c1=Q $1 (5... d1=Q $4 6. Qb8+ $18) 6. Qb8+ $1 (6. c8=Q Qxc8+ 7. Qxc8 f1=Q $19) 6... Ka6 7. c8=Q+ Qxc8+ 8. Qxc8+ Kb5 9. Qc6+ Kb4 10. Qb6+ $1 (10. e8=Q $2 Qxe8+ 11. Kxe8 f1=Q 12. d7 Qe2+ 13. Kf7 Qf2+ 14. Ke8 d1=Q 15. d8=Q Qh5+ $19) 10... Kc3 11. Qc5+ (11. e8=Q Qxe8+ 12. Kxe8 f1=Q $19) 11... Kb2 12. Qd4+ (12. e8=Q $2 Qxe8+ 13. Kxe8 f1=Q $19) 12... Kc2 13. Qc4+ (13. e8=Q $2 Qxe8+ 14. Kxe8 f1=Q $19) 13... Kb2 14. Qd4+ (14. e8=Q Qxe8+ 15. Kxe8 d1=Q $19) 14... Kb1 $1 (14... Kc1 15. Qc3+ $11) 15. Qd3+ $1 Ka2 $1 16. e8=Q $1 (16. Qa6+ $2 Kb2 17. e8=Q d1=Q 18. Qh8+ Qc3 $19) 16... f1=Q (16... d1=Q 17. Qa8+ Kb2 18. Qh8+ $1 $11) 17. Qa8+ Kb2 18. Qh8+ $1 (18. Qd4+ $2 Kc2 19. Qah8 Qb5+ 20. Kc7 Qc1 21. d7 d1=Q 22. d8=Q Qxd4 23. Qxd4 Kb1+ 24. Kd6 Qh6+ 25. Q8f6 Qa6+ 26. Ke7 Qh7+ 27. Qg7 Qb7+ 28. Kf8 Qf5+ $19) 18... Ka2 19. Qa8+ $11 { Perpetual check (positional draw). .} 1/2-1/2

[Event "sp.p. ChessStar 2020 Sec. Draw"] [Date "2020"] [White "Jan Timman"] [Result "1/2-1/2"] [FEN "K7/4P2P/5PP1/1n2B2p/k2P1P2/8/3ppp2/8 w - - 0 1"] 
 1. g7 $1 (1. h8=Q $2 d1=Q 2. Qc8 e1=Q 3. Qc4+ Ka3 4. e8=Q Qa4+ 5. Qxa4+ Kxa4 $19) 1... d1=Q 2. g8=Q (2. h8=Q $2 e1=Q $19) 2... Qc2 $1 3. e8=Q (3. Kb7 $2 e1=Q 4. Qa8+ Kb3 5. e8=Q Qxh7+ 6. f7 f1=Q 7. Qe6+ Qc4 8. Qa2+ Kxa2 9. Qxc4+ Ka3 $19) 3... e1=Q 4. Qxb5+ $1 Kxb5 5. Qd5+ Kb4 6. h8=Q f1=Q 7. Qb8+ $1 (7. Qf8+ $2 Kc3 8. Qa3+ (8. Qfc5+ Kd2 9. f7 Qa6+ 10. Kb8 Qeb1+ $19) 8... Kd2 9. f7 Qh1 10. Qaa5+ Kd3 11. Qab5+ Ke3 12. f8=Q Qa2+ $1 $19) (7. Qd6+ $2 Kc3 8. d5+ Kd2 9. Qb4+ Ke2 10. Qxh5+ Kf2 11. Qd4+ (11. Bd4+ Kg2) (11. Qh4+ Kg2 $19) 11... Kg2 12. Qg4+ Qg3 13. Qxg3+ Kxg3 14. f5+ Kh3 $19) 7... Kc3 8. Qbb7 $1 (8. Qa5+ $2 Kd3 9. Qbb5+ (9. Qa3+ Ke2) 9... Ke3 10. Qa3+ Qcd3 $19) 8... Qeb1 $1 (8... Qa4+ 9. Kb8 Qe8+ 10. Qc8+ Qxc8+ 11. Kxc8 Qa6+ 12. Kd7 Qg3 13. f7 Qg4+ 14. Ke7 $11) 9. f7 Qa4+ 10. Kb8 Qab5 $1 11. Qdc6+ $1 (11. Qdxb5 Qfxb5 12. d5+ Kc4 13. Qxb5+ Qxb5+ 14. Kc7 Qc5+ 15. Kd7 Kxd5 16. Ke8 h4 $1 $19) 11... Kd2 12. d5 $11 {eg} Qxb7+ 13. Qxb7 Qfb5 (13... Qxb7+ 14. Kxb7 Qb1+ 15. Kc7 Qf5 16. d6 Qxf7+ 17. d7 $11) 14. Qxb5 Qxb5+ 15. Kc7 ({or} 15. Kc8) 15... Qc5+ 16. Kd7 Qxd5+ 17. Ke7 $11 1/2-1/2

[Event "hm. ChessStar 2020 Sec. Draw"] [Date "2020"] [White "Michael Pasman"] [Result "1/2-1/2"] [FEN "1b6/k3B3/P4p1q/1P2p2B/pK4P1/6pP/8/8 w - - 0 1"] [PlyCount "30"] [EventDate "2020"] 
 1. Bc5+ $1 ({Try :} 1. g5 $2 {and Black wins after long and forced variation :} fxg5 2. Bc5+ Qb6 $1 3. Bxb6+ Kxb6 4. Bf3 Ba7 $1 5. Kxa4 Kc5 6. Bh1 Bb6 $1 7. Kb3 Kd4 8. Kc2 Ke3 9. Kc3 Kf2 10. Kc4 g2 11. Bxg2 Kxg2 12. Kd5 Bd4 13. Kc6 e4 14. b6 (14. Kd5 Bf2 $1 15. Kc6 $1 e3 16. a7 e2 17. a8=Q e1=Q 18. Kd7+ Kxh3 $19) 14... e3 15. a7 (15. b7 Ba7 $19) 15... e2 16. a8=Q e1=Q 17. Kd7+ (17. b7 Qe6+ 18. Kb5 Qb3+ 19. Kc6 Be5 $19) 17... Kxh3 18. b7 Be5 19. b8=Q Bxb8 20. Qxb8 Qd1+ 21. Ke7 g4 $19) 1... Ka8 {[#]} 2. g5 $3 { Sacrificing the bishop, black queen is shifted to worse position} (2. b6 Qd2+ $19) 2... Qxh5 (2... Qxg5 $2 3. Bf3+ $18) 3. b6 $1 Bc7 $1 (3... Qh4+ 4. Kb5 $1 Bc7 $11 {The same}) 4. bxc7 Qh4+ (4... Qxh3 $11 5. gxf6) 5. Kb5 $1 (5. Ka5 $2 Qxh3 6. gxf6 Qc8 $19) 5... Qxh3 6. gxf6 $1 (6. g6 Qd7+ 7. Kb6 g2 $19) 6... Qd7+ 7. Kb6 $1 Qe6+ 8. Kb5 $1 Qd7+ {There is no better place for queen to give a check and in the same time to keep eye on White pawns} 9. Kb6 Qc8 10. f7 g2 { [#]} 11. Kb5 $3 {Now quiet move to hide from check} (11. f8=Q $2 Qxf8 12. Bxf8 g1=Q+ $19) ({Try :} 11. Kc6 $2 Qxa6+ 12. Kd7 Qd3+ 13. Ke8 (13. Ke7 Qf5) 13... Qf5 14. f8=Q Qc8+ $1 15. Ke7 Qxf8+ 16. Kxf8 Kb7 $19) 11... g1=Q 12. Bxg1 a3 13. Bc5 $1 Qxc7 14. f8=Q+ Qb8+ 15. Qxb8+ Kxb8 $11 1/2-1/2

[