www.arves.org - Tehtavaniekka 2022

Studies awarded for the Tehtavaniekka 2022 tournament:

[Event "2nd Prize Tehtavaniekka"] [Site ""] [Date "2022"] [Round ""] [White "Jan Sprenger"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "4b3/2R5/3P4/8/q7/3K3p/k3B1R1/8 w - - 0 1"] [PlyCount "31"] [EventDate "2022"] 
 {Theme: White sacrifices rook and pawn to set up two different drawing mechanisms---stalemate and perpetual ---with rook and bishop against queen and bishop.} 1. Rf2 $1 {White cannot avoid a double attack against king and rook. But it is important to give the rook on the right square!} ({thematic try} 1. Rh2 $2 Bg6+ 2. Kc3 Ka3 $1 {threatening both Qb4# and Qc2+/Qd2+ etc.} 3. Bc4 $5 Qb4+ 4. Kd4 Qxd6+ {and Black takes the Rh2 without any white counterplay, e.g., } 5. Bd5 Qxh2 $36) 1... Bg6+ 2. Kc3 Qa3+ $1 ({main} 2... Ka3 3. Bc4 $1 Qb4+ 4. Kd4 Qxd6+ 5. Bd5 $1 {[compare the try 1. Rh2]} Qxc7 6. Ra2+ Kb4 7. Rb2+ Ka5 8. Ra2+ Kb6 9. Rb2+ Ka7 10. Ra2+ Kb6 (10... Kb8 $4 11. Ra8#) 11. Rb2+ $10 { perpetual with rook and bishop, self block of the escape route}) 3. Kc4 Qb3+ 4. Kd4 Qb6+ 5. Rc5 Qxd6+ 6. Kc3 $3 {It is not important to defend the rook, but to prevent that Black can play h3-h2: compare the line 6. Rd5.} ({thematic try } 6. Rd5 $2 Qb6+ 7. Rc5 Qd8+ 8. Kc3 {looks more natural because White has played Kc3 without giving up the c5 rook. However, in this line Black has a crucial check on the long diagonal:} Qh8+ $1 9. Kb4 Qb2+ 10. Ka5 Qd2+ 11. Kb6 Qd6+ 12. Kb5 {This is almost the same position like in the solution: wKb5 vs. wKc3. But here Black can exploit that there is no checkmate threat:} h2 $1 13. Bc4+ Ka1 14. Rf1+ Kb2 15. Rf2+ Kc3 $19) 6... Qxc5+ (6... Qg3+ $4 7. Bd3+ { cross check echo} Qxf2 8. Ra5#) 7. Bc4+ {cross check} Ka1 $1 8. Ra2+ $1 Kb1 9. Rb2+ Kc1 10. Rc2+ $1 {Stalemate play with rook and bishop. The mechanism is known from Nadareishvili, Shakhmaty 1976, and Kozirev, "64" 1996.} Kd1 (10... Bxc2 {stalemate}) 11. Rd2+ Ke1 12. Re2+ Kf1 $5 {A last winning attempt based on the h-pawn and the idea of dominating the rook.} 13. Re5+ Qxc4+ 14. Kxc4 h2 15. Ra5 $1 h1=Q 16. Ra1+ {draw. Organic introduction with the choice on the first move, playing connection of two flanks (pointe 6.Kc3!!), based on catching black queen - are realized in the etude freshly and harmoniously. Successful development of stalemate idea from G. Nadareishvili (HHdbVI#46229) and V. Kozirev (HHdbVI#24316).} 1/2-1/2

[Event "3rd Prize Tehtavaniekka"] [Site ""] [Date "2022"] [Round ""] [White "Serhiy Didukh"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/3B4/3p4/Qp5b/3k4/4n3/1p3p2/7K w - - 0 1"] [PlyCount "21"] [EventDate "2022"] 
 1. Qd2+ Ke4 (1... Kc4 2. Bxb5+) 2. Qb4+ $1 (2. Bc6+ $2 d5 3. Qb4+ Nc4 4. Kg2 Kd4 5. Bxb5 (5. Kxf2 Bg6 6. Qxb5 Be4 $1 $19) 5... f1=Q+ $1 6. Kxf1 b1=Q+ 7. Qxb1 Nd2+) 2... Kf3 {Bishop has options.} 3. Bc6+ $1 ({Logical try} 3. Bxb5 $2 b1=Q+ $1 4. Qxb1 Kg3 5. Be2 Bf3+ $1 (5... Bf7 6. Bc4 $1) (5... Bxe2 6. Qg6+) 6. Bxf3 Kxf3 7. Qf1 d5 $1 {zz} 8. Qh3+ Ke2 9. Qh2 (9. Qh5+ Ke1) 9... Ke1 10. Qh4 d4 11. Qg3 Ke2 $19) ({Logical try} 3. Bh3 $2 Bg4 $1 4. Bxg4+ Nxg4 5. Qxb5 (5. Qc3+ Ne3 6. Qf6+ Ke4 7. Qe6+ Kd4 8. Qxd6+ Nd5) 5... b1=Q+ $1 6. Qxb1 Ne3 7. Qf1 d5 $1 {with the same zugzwang.}) 3... d5 4. Bxb5 b1=Q+ 5. Qxb1 Kg3 6. Be2 $1 Bf3+ (6... Bxe2 7. Qb8+ Kg4 8. Qg3+) 7. Bxf3 Kxf3 8. Qf1 $1 {zz} (8. Kh2 $2 f1=Q 9. Qf5+ Ke2 $1 $19) 8... d4 (8... Nxf1 {stalemate.}) 9. Qh3+ Ke2 10. Qh5+ Ke1 11. Qa5+ $1 {draw. Logical study on mutual zugzwang with white bishop pointe (3.Bc6+!!). An interesting detail: the study ends with the return of the white queen to his original square.} 1/2-1/2

[Event "1 hm. Tehtavaniekka"] [Site ""] [Date "2022"] [Round ""] [White "Michael Pasman"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/6b1/8/3p4/4pR2/4Pp1p/7P/3k1K2 w - - 0 1"] [PlyCount "28"] [EventDate "2022"] 
 1. Rf5 $1 {to force d4} (1. Rxf3 $2 exf3 $19) (1. Rf7 $2 Bc3 $1 2. Rd7 (2. Rf5 d4 3. exd4 e3) 2... d4 $19) 1... d4 2. Rxf3 $1 d3 $1 (2... exf3 3. exd4 Bxd4 { stalemate}) 3. Rg3 $1 (3. Rf4 $2 d2 $19) 3... Be5 (3... Bc3 4. Rg6 $1 d2 5. Rg1 $1 Be5 (5... Bd4 6. Kf2+ $11) 6. Kf2+ Kc2 7. Ke2 Bxh2 8. Rd1 $11) 4. Rg5 $1 Bc3 5. Rg6 $1 (5. Rg8 $2 Kc2 6. Rd8 Kd2 $19) 5... Kd2 (5... Kc2 6. Rd6 $1 Be5 (6... Kd2 7. Kf2 Be5) 7. Rc6+ Kd2 8. Re6 $1 $11) (5... d2 6. Rg1 $1 Be5 7. Kf2+ Kc2 8. Ke2 Bxh2 9. Rd1 $11) 6. Kf2 Bd4 $1 7. Re6 $1 (7. Rg3 $2 Bf6 $1 8. Rg4 Kc2 $1 9. Rxe4 d2 $19) 7... Bxe3+ 8. Kf1 Kc2 9. Rc6+ $1 Kd1 10. Ra6 $1 Bg1 $1 (10... Bc1 11. Re6 $1 e3 12. Rxe3 $1 Bxe3 {stalemate}) 11. Re6 $1 Kc2 (11... e3 12. Rxe3 $1 Bxe3 {stalemate}) (11... d2 12. Rxe4 Kc2 13. Re2 Be3 14. Rxd2+ $1 Kxd2 {stalemate}) 12. Rxe4 d2 13. Re2 Be3 14. Rxd2+ Kxd2 {stalemate. A subtle duel between the white rook and the black bishop. The final stalemate is unexpected. } 1/2-1/2

[Event "4 hm. Tehtavaniekka"] [Site ""] [Date "2022"] [Round ""] [White "Michal Hlinka"] [Black "Lubos Kekely"] [Result "1-0"] [SetUp "1"] [FEN "8/8/3n1p2/2r5/5P1P/1k1K4/2N5/5R2 w - - 0 1"] [PlyCount "27"] [EventDate "2022"] 
 1. Rb1+ (1. Nd4+ $2 Kb2 2. Rh1 Rh5 $11) 1... Ka4 2. Rb6 Nf5 (2... Rd5+ 3. Ke2 Ka5 4. Ne3 $1 Rd2+ 5. Kxd2 Kxb6 6. Nd5+ Kc5 7. Nxf6 $18) 3. Ra6+ $1 (3. h5 $2 Nh6 4. Rxf6 Rxh5 $11) (3. Rxf6 $2 Nxh4 4. Ra6+ Ra5 $11) 3... Kb5 4. Rxf6 { delayed capture} Nxh4 5. Nd4+ Kb4 6. Rb6+ $1 {switchback} (6. Rh6 $2 Ng2 7. f5 Nf4+ 8. Ke4 Nd5 9. Rd6 Kc4 $11) 6... Ka4 7. Rh6 Ng2 8. f5 Nf4+ 9. Ke4 Nd5 10. Rd6 Nc3+ (10... Ne7 11. f6 Ng6 12. f7 Rc7 13. Rf6 Nf8 14. Ke5 Kb4 15. Rf4 Ka5 16. Kf6 $18) 11. Kd3 Nd5 (11... Rd5 12. Rc6 Nb5 13. Rc4+ Ka5 14. Ke4 $18) 12. Ne6 Ra5 {(b5)} (12... Nb4+ 13. Ke4 Rc4+ 14. Rd4 Rc6 15. Ke5 $18) 13. Nc5+ $1 Rxc5 14. Kd4 {win. Painstaking work by White (3.Ra6+! and 6.Rb6+!) to save his passed pawn. The spectacular sacrifice of the knight in the final game seems to be original.} 1-0

[Event "4 com. Tehtavaniekka"] [Site ""] [Date "2022"] [Round ""] [White "Mario Garcia"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "7K/P6p/8/8/2p2N2/8/p1p4p/6k1 w - - 0 1"] [PlyCount "19"] [EventDate "2022"] 
 1. a8=Q $1 (1. Nh3+ $2 Kg2 2. a8=Q+ Kxh3 3. Qf3+ Kh4 4. Qf4+ Kh3 5. Qf1+ Kg3 $11) (1. Ne2+ $2 Kf2 2. a8=Q Kxe2 $11) 1... h1=Q (1... Kf2 2. Qh1 {/g2+-}) 2. Ne2+ Kf2 ({main 1 :} 2... Kh2 3. Qb8+ Kg2 (3... Kh3 4. Qg3#) 4. Qb7+ Kh2 5. Qc7+ Kg2 6. Qc6+ Kh2 (6... Kf2 7. Qxh1 Kxe2 8. Qc1 {as line of the solution}) 7. Qd6+ Kg2 8. Qd5+ Kh2 9. Qe5+ Kg2 10. Qe4+ Kh2 11. Qh4+ Kg2 12. Nf4+ Kg1 ( 12... Kf3 13. Qxh1+ $18) 13. Qe1+ Kh2 14. Qf2+ Qg2 15. Qxg2#) 3. Qxh1 Kxe2 4. Qc1 $1 Kd3 ({main 2 :} 4... a1=Q+ 5. Qxa1 Kd2 6. Qd4+ $1 (6. Qa5+ $2 c3 $1 7. Qg5+ Kd1 8. Qg1+ Kd2 9. Qd4+ Kc1 $1 10. Kg7 h5 11. Kf6 h4 12. Kf5 h3 13. Ke4 h2 $11) 6... Kc1 7. Kg7 $1 h5 8. Kf6 h4 9. Qe3+ Kd1 (9... Kb1 10. Qb6+ Kc1 11. Ke5 h3 12. Qb7 h2 13. Kd4 h1=Q 14. Qxh1+ Kd2 15. Qh2+ Kd1 16. Qh5+ Kd2 17. Qa5+ Kd1 18. Qa4 Kd2 19. Qa2 Kd1 20. Kxc4 c1=Q+ 21. Kd3 $18) 10. Qg1+ Kd2 11. Qg5+ Kd1 12. Qd5+ Kc1 13. Ke5 h3 14. Kd4 $1 Kb2 15. Qb5+ Ka1 16. Qa4+ Kb1 17. Qb4+ Ka1 18. Qe1+ Kb2 19. Qe2 Kb1 20. Kxc4 h2 21. Kc3 c1=Q+ 22. Kb3 h1=Q 23. Qa2#) 5. Kg7 $1 (5. Kxh7 $2 a1=Q 6. Qxa1 Kd2 $11) 5... h5 6. Kf6 {/g6 -the king goes to square f4} h4 7. Kf5 {/g5} h3 8. Kf4 $1 Kc3 (8... h2 9. Qe3#) (8... c3 9. Kf3 $1 (9. Kg3 $2 a1=Q 10. Qxa1 Kd2 11. Qa2 h2 12. Kxh2 Kd1 $11) 9... h2 10. Kf2 Kc4 11. Qa1 $1 Kd3 (11... Kb3 12. Kg2 $18) 12. Qf1+ {/h1} Kd2 13. Qe1+ Kd3 14. Qe2+ Kd4 15. Qf1 $18) 9. Ke3 $1 (9. Qa3+ $2 Kd2 10. Qxa2 Kd1 11. Qa4 h2 $11) 9... h2 (9... Kb3 10. Kd2 c3+ 11. Kd3 $11) 10. Qa3# {The final mates by the queen.} 1-0