www.arves.org - Probleemblad 2019-2020

Studies awarded for magazine Probleemblad 2019-2020 tournament.

[Event "1.Pr Probleemblad 2019-2020"] [Site ""] [Date "2019.07.01"] [Round ""] [White "Slumstrup Nielsen, Steffen and Minski, Martin"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/1P6/K4P2/6P1/2p5/7N/7b/4r2k w - - 0 1"] [PlyCount "19"] [EventDate "2018"] 
 1. f7 $1 (1. Nf2+ $2 Kg2 2. f7 Bd6 3. b8=Q Ra1+ 4. Kb6 Rb1+ 5. Kc6 Rxb8 6. Kxd6 Kxf2 7. g6 c3 8. g7 c2 9. f8=Q+ Rxf8 10. gxf8=Q+ Ke2 $11) 1... Ra1+ $1 { in order to avoid the Nowotny} (1... Rf1 2. Nf4 $1 {Nowotny} Rxf4 3. b8=Q Rf6+ 4. gxf6 $18) 2. Kb5 $1 (2. Kb6 $2 Rf1 3. g6 c3 4. Ng1 $4 Bxg1+ $1 $19 {with check!}) 2... Rf1 (2... Rb1+ 3. Kc6 $1 (3. Kxc4 $2 Bd6 4. g6 Bf8 $11) 3... Rf1 4. Nf4 $1 {Nowotny} Rxf4 5. b8=Q Rf6+ 6. gxf6 $18) 3. g6 (3. Nf4 $2 Rxf4 4. g6 c3 5. b8=Q Rf5+ 6. Ka4 Bxb8 $11) 3... c3 {Again Nowotny? No!} 4. Ng1 $3 (4. Nf4 $2 Rxf4 5. b8=Q Rf5+ 6. Ka4 Bxb8 $11) (4. g7 $2 c2 5. f8=Q c1=Q $11) 4... Bxg1 (4... Kxg1 5. g7 $18) (4... Rxg1 5. f8=Q c2 6. Qf3+ $18) 5. g7 (5. b8=Q $2 Rb1+ ) 5... c2 6. f8=Q c1=Q 7. Qh8+ Bh2 8. Qxh2+ $1 Kxh2 9. b8=Q+ Kh3 10. Qh8+ $18 1-0

[Event "2.Pr Probleemblad 2019-2020"] [Site ""] [Date "2019.07.01"] [Round ""] [White "Hlinka, Michal and Garcia, Mario"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "4N3/6p1/2Np3b/1P1k4/8/8/5K2/8 w - - 0 1"] [PlyCount "19"] [EventDate "2018"] 
 1. Kf3 $1 (1. Ke2 $2 Kc5 2. Nd4 Kb6 3. Kf3 (3. Nxd6 Kc5 4. N6f5 Bf4 5. Kd3 Be5 $11) 3... d5 $1 (3... g6 $2 4. Ke4 $18) 4. Ke2 g5 5. Nd6 g4 $11) (1. Nc7+ $2 Kc5 2. Nd4 Kxd4 3. b6 Be3+ $1 4. Kf3 Kd3 5. b7 Ba7 $11) 1... Kc5 2. Nd4 d5 ( 2... g6 3. Nc7 Kb6 4. Nd5+ Ka5 5. Ke4 $1 $18 Bg7 6. Ne6 Kxb5 7. Nxg7 $18) 3. Nc7 g6 (3... Bg5 4. Nce6+ {fork}) 4. Ke2 $1 {domination} ({Try :} 4. Nce6+ $2 Kb6 5. Ke2 Bc1 $1 {(1)} (5... Ka5 $2 6. Kd3 Kb6 (6... Bc1 7. Nb3+ Kxb5 8. Nxc1 g5 9. Nd4+ $18) 7. Kc3 Ka5 8. Nd8 g5 9. N8c6+ Kb6 10. Kb4 g4 11. Nf5 Bd2+ 12. Ka4 $18) 6. Kd3 (6. Nb3 Ba3 {/h6=}) 6... Bb2 $1 (6... Ka5 $2 7. Nb3+ $18) 7. Kc2 Ba1 $1 8. Kb3 Ka5 $1 9. Nc2 Bf6 $11) (4. Kg4 $2 Be3 $1 5. Nce6+ Kb6 6. Kf3 Bd2 $11) 4... Kb6 (4... Bc1 5. Nb3+ $18 {fork}) (4... g5 5. Nce6+ $1 (5. Nf5 $2 Bf8 6. Ne6+ Kxb5 7. Nxf8 d4 $11) 5... Kb6 6. Kf3 Ka5 7. Kg4 $18) (4... Bg5 5. Nce6+ {fork}) 5. Nxd5+ (5. Nce6 $2 Bc1 $11 {similar to (1)}) 5... Kc5 6. Nc7 Kxd4 7. b6 Bf4 8. Ne6+ {fork} Kd5 9. Nxf4+ Kc6 10. Nd5 $18 1-0

[Event "3.Pr Probleemblad 2019-2020"] [Site ""] [Date "2019.04.01"] [Round ""] [White "Slumstrup Nielsen, Steffen"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "6qk/7p/5Pr1/2P1RK2/3B3p/8/4P3/8 w - - 0 1"] [PlyCount "33"] [EventDate "2018"] 
 1. Re8 Rg5+ {Black has no choice but to start giving checks.} (1... Qxe8 2. f7+ $18) 2. Kf4 {Of course, White cannot step on to the e-file.} Rg4+ 3. Kf3 Rg3+ ( 3... Rxd4 4. f7 {is an easy win.}) 4. Kf2 Rg2+ 5. Ke1 (5. Kf1 {(?)} Rg1+ 6. Kf2 (6. Bxg1 $2 Qxe8) 6... Rg2+ 7. Ke1 {is a waste of time.}) 5... Rxe2+ $1 { What now? Must the king go East or West?} (5... Rg1+ 6. Kd2 $18) 6. Kf1 {East!} (6. Kd1 $2 Re4 7. Bc3 Re1+ {(still immune from capture)} 8. Kc2 Re2+ 9. Kb1 Re1+ 10. Kb2 Re2+ 11. Ka3 $2 (11. Ka1 $11) 11... Ra2+ 12. Kb4 Ra4+ $1 {and Black even wins.}) (6. Rxe2 $2 Qg3+ $1 $11) 6... Re1+ {It seems to make little difference if the rook gives checks on the e-file or the g-file?} ({The rook on e8 is immune as well.} 6... Rxe8 7. f7+ $16) 7. Kf2 (7. Rxe1 $2 Qc4+) 7... Re2+ 8. Kf3 (8. Rxe2 $2 Qg3+) 8... Re3+ {Still immune} 9. Kf4 Re4+ 10. Kf5 { Back to the king's starting square.} (10. Rxe4 $2 Qg3+) 10... Rxd4 $1 (10... Re5+ $2 11. Bxe5 {(finally!)} Qxe8 12. f7+ Qxe5+ 13. Kxe5 $18) 11. f7 Qf8 $1 ( 11... Rg4 {eg} 12. c6) 12. Rxf8+ Kg7 13. Rh8 $1 (13. Ra8 $2 Kxf7 14. c6 Rc4 $11 (14... Rd5+ $11)) 13... Kxf7 14. c6 Rc4 (14... Rd5+ {changes nothing}) 15. c7 Rxc7 16. Rxh7+ Kg8 17. Rxc7 1-0

[Event "5.Pr Probleemblad 2019-2020"] [Site ""] [Date "2019.04.01"] [Round ""] [White "Hlinka, Michal and Kekely, Lubos"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/6P1/8/8/8/Kp1b2p1/P7/5n1k w - - 0 1"] [PlyCount "17"] [EventDate "2017"] 
 1. g8=Q bxa2 ({main} 1... g2 2. Qe6 $1 Nh2 3. Kxb3 $1 Bf1 4. Qe4 Ba6 5. a4 Bc8 6. a5 Bg4 7. a6 Bf3 8. Qxf3 Nxf3 9. a7 g1=Q 10. a8=Q {phoenix}) 2. Qd5+ $1 ({ them. try} 2. Qxa2 $2 g2 $1 {zz} 3. Kb4 (3. Qe6 Nh2 {zz, compare with main after 4.Qe6! zz} 4. Ka4 Bc2+ $1 5. Ka3 g1=Q 6. Qc6+ Qg2 $19) 3... Nh2 4. Qe6 Bf1 5. Qe4 Ba6 6. Qc2 (6. Ka5 Bc8 7. Qc2 Bg4 8. Qe4 Bf3 $19) 6... Bb7 $19) 2... g2 3. Qxa2 $1 {zz} (3. Kxa2 $2 Be2 4. Qe4 Bd1 5. Qd5 Bg4 6. Qe4 Nh2 7. Kb3 Bf3 $19) 3... Nh2 (3... g1=Q 4. Qd5+ $11) 4. Qe6 $1 {zz} (4. Qd5 $2 Be2 $19) 4... Bb5 5. Qe4 $1 (5. Kb3 $2 Bf1 6. Qe4 Ba6 7. Qc2 Bb7 $19) 5... Bf1 6. Ka4 $1 (6. Ka2 $2 Ba6 7. Qc2 g1=Q 8. Qc6+ Qg2+ $19) 6... Ba6 7. Qc2 $1 Bf1 (7... Bb7 8. Qb1+ $11) (7... g1=Q 8. Qc6+ $11) 8. Qe4 Ba6 9. Qc2 {positional draw. Meredith. Phoenix. Reciprocal zugzwangs.} 1/2-1/2

[Event "2.hm Probleemblad 2019-2020"] [Site ""] [Date "2020.10.01"] [Round ""] [White "Slumstrup Nielsen, Steffen"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/8/1kp3r1/8/1PpP1R1K/8/8/8 w - - 0 1"] [PlyCount "17"] [EventDate "2020"] [SourceVersionDate "2020.04.11"] 
 {White's king is cut off, so Black's must be cut off as well. [#]} 1. Rf5 c5 $3 {This trick is known from A. Kubbel, 64, 1935 (HHDBV #68051)} (1... Rd6 2. Rc5 Rxd4+ 3. Kg3 $11) 2. bxc5+ (2. Rxc5 $2 Rc6 3. Kg4 c3 $1) (2. dxc5+ $2 Kb5 3. c6+ Kxb4 4. c7 Rc6 $19) 2... Kc6 3. Rf8 {White must check the Black king from behind, or Black plays Rg1 and c3 winning.} Rg7 (3... Kd5 4. Rd8+ Ke4 5. d5 c3 6. d6 c2 7. Re8+ Kf4 8. Rf8+ $11) (3... c3 4. Rf3 $11) 4. Rc8+ (4. Rf5 $2 Rd7) 4... Rc7 $1 (4... Kd5 5. Rd8+ Ke4 6. d5 c3 7. d6 c2 8. Re8+ Kd5 9. Re1 Kxc5 10. Rc1 $11) 5. d5+ Kd7 (5... Kb7 6. Re8 $11 (6. Rh8 $11)) {Now the rook must return to the first rank. But along which file?} 6. Rh8 $3 (6. Rg8 $2 Rxc5 7. Kg3 {Blocking the way of the rook.} (7. Rg1 Kd6 $19) 7... c3 $19) (6. Ra8 $2 Rxc5 7. Kg3 Rxd5 8. Ra4 (8. Kf3 Kc6) 8... Rd4 {this move is possible because White's rook is on the wrong side of the c4-panw.} 9. Kf3 Kc6 10. Ra5 Kb6 11. Rh5 Rd2 $1 (11... c3 $2 12. Ke2 $11) 12. Ke3 c3 13. Rg5 Rd1 14. Rg2 Kc5 (14... Kb5) (14... Ka5 $19)) (6. Rf8 $2 Rxc5 7. Kg3 Rxd5 8. Rf4 Rc5 9. Kf2 c3 { Again the king is in the way of the rook.}) (6. Rb8 $2 Rxc5 7. Kg4 Rxd5 8. Kf3 Kc6) 6... Rxc5 7. Kg3 c3 (7... Rxd5 8. Rh4 $1 $11) 8. Rh1 c2 (8... Rxd5) 9. Rc1 $11 {1/2-1/2} 1/2-1/2

[Event "3.hm Probleeblad 2019-2020"] [Site ""] [Date "2019.10.01"] [Round ""] [White "Keith, Daniel"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "6N1/q7/4P3/7k/1B2K3/8/3N4/8 w - - 0 1"] [PlyCount "15"] [EventDate "2019"] 
 1. Nf6+ $1 (1. e7 $2 Qa8+ $10) (1. Ne7 $2 Qb6 $10) 1... Kg5 $1 (1... Kg6 2. Nd5 $18 {et 2... Dh7 sans échec}) 2. Nd5 (2. Bc3 $2 Qa4+ {ou De7 =}) (2. e7 $2 Kxf6 3. e8=Q Qb7+ $10 4. Kd3 Qxb4 5. Ne4+ Kg7) 2... Qh7+ 3. Ke3 $1 (3. Kd4 $2 Qh8+ 4. Kd3 Qh3+ $10) (3. Ke5 $2 Qh8+ {ou Dh2+ =}) 3... Qa7+ $1 (3... Kf5 4. e7 $18) (3... Qh3+ 4. Nf3+ Kg4 5. Nf6+ $18 {par exemple} Kg3 6. Ng5 Qh6 7. Nfe4+ Kg4 8. e7) 4. Ke2 $1 (4. Kf3 $2 Qd4 $1 5. Ne4+ Kf5 $10) (4. Kd3 $2 Qa6+ $10) 4... Qa6+ 5. Kf3 Qxe6 (5... Kf5 {est sans espoir} 6. e7 Qe6 7. Ne3+ Ke5 (7... Kf6 8. Ne4+) 8. Ndc4+ $1 (8. Bc3+ $2 Kd6 9. Bb4+ Kd7 $10) 8... Kf6 9. Nb6 $1 Kf7 10. Nbd5 Qh3+ 11. Ke2 $18 {Et le pion blanc est trop fort. Le roi blanc progressera sous la protection de ses pièces.}) (5... Qd3+ 6. Ne3 Kf6 7. e7 Qg6 8. Nd5+ Kf7 9. Ne4) 6. Ne4+ Kf5 (6... Kh6 7. Bf8+ $18) (6... Kh4 7. Be1+ $18) 7. Ne7+ Ke5 8. Bc3# 1-0

[Event "4.hm Probleemblad 2019-2020"] [Site ""] [Date "2020.01.01"] [Round ""] [White "Hlinka, Michal and Kekely, Lubos"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "1B6/8/8/6k1/4qNP1/8/R4PN1/4r1nK w - - 0 1"] [PlyCount "16"] [EventDate "2020"] [SourceVersionDate "2019.12.24"] 
 {[#]} 1. Kh2 (1. Ra3 $2 Nf3+ 2. Nxe1 Qxe1+ 3. Kg2 Kxg4 4. Nh3 Qe4 5. Rc3 Nh4+ 6. Kf1 Qb1+ 7. Ke2 Qb2+ 8. Kd3 Qxb8 $19) 1... Kxg4 (1... Rb1 2. Ra7 Rxb8 3. Rg7+ Kf6 4. Nh5+ Ke6 5. Kxg1 Qf3 6. Rg6+ Kd7 7. Rg7+ Kc6 8. Rg6+ Kb7 9. Ng3 Ka7 10. Rg7+ Ka8 11. Rg5 Rb1+ 12. Nf1 Rb2 13. Rf5 Qxg4 14. Ng3 $11) 2. Ra3 $1 (2. Nxe1 $2 Qxe1 3. Kg2 Nf3 4. Nh3 Qe4 {as after 1.Ra3?}) 2... Nf3+ (2... Qf3 3. Nxe1 $1 Qxa3 4. Kxg1 $11) (2... Qh7+ 3. Nh3 Nxh3 4. Rg3+ Kf5 5. Rxh3 Rh1+ 6. Kxh1 Qxh3+ 7. Bh2 $11) 3. Rxf3 Kxf3 (3... Qxf3 4. Nxe1 $11) 4. Nh3 $1 (4. Nxe1+ $2 Qxe1 5. Nh3 Qe7 $19) 4... Rh1+ (4... Qb1 {or Kg4} 5. Nxe1+ Qxe1 6. Bg3 $11) 5. Kxh1 Qb1+ 6. Ne1+ $1 (6. Kh2 $2 Qxb8+ $19) 6... Qxe1+ (6... Ke2 7. Bg3 $11) 7. Ng1+ Kxf2 (7... Kg4 8. Bg3 $11) 8. Bg3+ Kxg3 1/2-1/2

[Event "comm. Probleemblad 2019-2020"] [Site ""] [Date "2019.10.01"] [Round ""] [White "Ostmoe, Geir Sune"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "Q5K1/3r4/5Pk1/3P4/4q3/R7/3p4/8 w - - 0 1"] [PlyCount "32"] [EventDate "2018"] 
 1. f7 $1 Rxf7 2. Qc6+ (2. Rg3+ $2 Kh5 3. Kxf7 Qf5+ {(or Qf4+)} 4. Ke7 Qe5+ 5. Kf7 d1=Q {wins.}) 2... Kg5 3. Rh3 $1 Kg4 $1 (3... d1=Q 4. Qh6+ {draws, e.g.} Kf5 5. Rh5+ Kg4 6. Rh4+ Kf3 7. Rxe4) 4. Qe6+ Qxe6 5. dxe6 Rg7+ $1 (5... d1=Q 6. exf7 {draws.}) 6. Kxg7 d1=Q 7. Rh7 $1 {The only right place for the rook, preparing for stalemate.} (7. e7 $2 Qd4+ {(or Qd7)} 8. Kf7 Qd5+ 9. Kf8 Qf5+ 10. Kg7 Qe6 11. Kf8 Qf6+ {wins.}) 7... Qd6 8. Kf7 Qd5 9. Kf8 $1 Qf3+ 10. Kg8 $1 ( 10. Rf7 $2 Qa8+ {wins.}) 10... Qd5 11. Kf8 Qf5+ 12. Rf7 Qxe6 {Allowing a well-known stalemate, but otherwise the pawn would have reached e7.} (12... Qe5 13. Rg7+ Kf5 14. e7 {draws.}) 13. Rg7+ Kf5 14. Rf7+ Kg6 15. Rg7+ Kh6 (15... Kf6 16. Rg6+ $1 Kxg6 {stalemate.}) 16. Rh7+ $1 Kxh7 {stalemate.} 1/2-1/2

[Event "comm. Probleemblad 2019-2020"] [Site ""] [Date "2020.07.01"] [Round ""] [White "Kiryakov, Peter and Arestov, Pavel"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6nr/4bk1p/8/8/8/8/1K5Q/8 w - - 0 1"] [PlyCount "25"] [EventDate "2020"] [TimeControl "600"] 
 1. Kb1 $1 {White needs xa2 to give perpetual check. Black has 2 main options A) 1...h6 and B) 1...h5} (1. Qh5+ Kf8 $1 {-+} (1... Kg7 2. Qg4+ {=})) 1... h6 ( 1... Nf6 2. Qa2+ Kf8 3. Qa8+ Ne8 4. Qf3+ Bf6 5. Qa3+ Kg7 6. Qg3+ {[%eval 32766, 0] = positional draw}) ({B)} 1... h5 2. Qa2+ Kf8 (2... Kg7 3. Qg2+ {see main line}) 3. Qa8+ Kg7 4. Qg2+ Kh6 5. Qg3 $3 Bg5 (5... Nf6 6. Qe3+) (5... Rh7 6. Qxg8 {=}) 6. Qb8 $1 {.} Bf6 7. Qf4+ Kg6 8. Qg3+ Bg5 9. Qb8 h4 10. Qc8 Bf6 ( 10... Kg7 11. Qg4 Kh6 12. Qc8 {[%eval 32764,0] = positional draw}) 11. Qg4+ Kf7 12. Qc4+ Kf8 13. Qc8+ Kg7 14. Qg4+ {[%eval 32762,0] = positional draw}) 2. Qc2 $1 {Preventing Rh8-h7 ( 2. Qb2? Rh7! -+ ) and preparing perpetual check. All other attempts of perpetual checks fail} (2. Qh5+ $2 Kf8 $1 3. Qf3+ Bf6 $1 ( 3... Nf6 $2 4. Qa8+ Kg7 5. Qg2+ Kh7 6. Qc2+ {=}) 4. Qa8+ Kg7 5. Qg2+ Bg5 6. Qb7+ (6. Qb2+ Nf6 7. Qb7+ Kg6 {-+}) 6... Ne7 $1 7. Qb2+ Bf6 8. Qg2+ Ng6 {-+}) ( 2. Qa2+ Kg7 ({or} 2... Kf8 3. Qa8+ Kg7 4. Qg2+ Bg5 {-+}) 3. Qb2+ Bf6 4. Qg2+ Bg5 5. Qb7+ Ne7 {-+}) 2... Kf8 (2... Kg7 3. Qc3+ {see main line}) 3. Qc8+ Kg7 4. Qc3+ $1 (4. Qg4+ $2 Bg5 5. Qd7+ Ne7 {-+}) 4... Nf6 (4... Bf6 5. Qg3+ Kf8 6. Qb8+ Kf7 7. Qb3+ Kg7 8. Qg3+ {[%eval 32760,0] = positional draw}) 5. Qg3+ Kf7 ( 5... Kh7 6. Qd3+) 6. Qb3+ Kf8 7. Qb8+ Ne8 8. Qf4+ Bf6 9. Qb4+ Kg7 10. Qb7+ Kf8 11. Qb4+ Be7 12. Qf4+ Nf6 13. Qb8+ {[%eval 32758,0] = positional draw} 1/2-1/2

[Event "comm. Probleemblad 2019-2020"] [Site ""] [Date "2020.07.01"] [Round ""] [White "Becker, Richard"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "1K6/2pQ4/5p2/8/8/8/q3Np2/1k6 w - - 0 1"] [PlyCount "47"] [EventDate "2015"] 
 1. Qd1+ (1. Nc3+ $2 Kc2 2. Nxa2 f1=Q $11) 1... Kb2 2. Qc1+ Kb3 3. Qc3+ Ka4 4. Qd4+ Ka3 5. Qc5+ Ka4 ({MAIN} 5... Kb2 6. Qc3+ Kb1 7. Qc1# {model mate}) 6. Qa7+ Kb4 7. Qxa2 f1=Q 8. Qb2+ Kc5 (8... Kc4 9. Qd4+ Kb3 (9... Kb5 10. Nc3+ Kc6 11. Qd5+ Kb6 12. Na4+ Ka6 13. Nc5+ Kb5 14. Nd3+ $18) 10. Qc3+ Ka2 (10... Ka4 11. Qb2 $18) 11. Qa5+ Kb2 (11... Kb3 12. Nd4+ $18) 12. Qb4+ Kc2 13. Nd4+ $18) 9. Kxc7 $1 Qd1 (9... Qf2 10. Qb6+ $18) 10. Qc3+ Kb5 (10... Kd5 11. Qc6+ Ke5 12. Qe8+ Kf5 13. Qh5+ Ke6 14. Nf4+ $18) 11. Nd4+ Ka4 12. Kd6 $1 ({TRY} 12. Kb6 $2 Qb1+ 13. Ka6 Qf1+ 14. Ka7 Qd1 $1 15. Kb6 Qb1+ 16. Kc5 Qf5+ $1 17. Nxf5 { stalemate}) 12... Qb1 13. Qc6+ Ka3 14. Nb5+ Kb3 15. Qd5+ Kb2 16. Qd4+ Kb3 17. Qe3+ Kb4 18. Qc5+ Kb3 19. Qa3+ Kc2 (19... Kc4 20. Qc3+ Kxb5 21. Qc6+ Ka5 22. Qa8+ $18) 20. Qc3+ Kd1 21. Qd4+ Kc1 22. Qe3+ Kb2 23. Qc3+ Ka2 24. Qa3# { echo model mate} 1-0