Monday, 26 June 2017

Study 106c

Árpád Rusz
StrateGems
2016
3rd Prize
- version -

White wins

1. Rg8! Thematic try: 1. Rh8? Nxe6+ 2. Rxd8+ Nxd8 3. c7 Rb3+ 4. Ka6 Rb8! mutual zugzwang 5. Rf6 (5. Rh6 Nf7 6. cxb8=Q+ Kxb8 =) 5... Nc6! 6. cxb8=Q+ (6. Rxc6 Rb6+! 7. Kxb6 stalemate) 6... Nxb8+ 7. Kb6 Nd7+ = 1... Nxe6+ 1... Rb3+ 2. Kc5 Rb5+ 3. Kc4 +- (3. Kd6?? Rd5#; 3. Kd4? Rd5+ 4. Kc4 Ka7 =) 2. Rxd8+ Nxd8 3. c7 Rb3+ 3... Nf7 4. Rh3! +- 4. Ka6 Rb8! self-fork 4... Ra3+ 5. Kb5 Rb3+ 6. Ka4! (6. Kc4? Rb8! 7. Rh8 Rc8 8. Rxd8 Kb7 =) 6... Rb8 7. Rh8 +-

5. Rg6!! mutual zugzwang 5... Rc8 5... Nf7 6. cxb8=Q+ Kxb8 7. Rg8+ Kc7 8. Rg7 +-; 5... Nc6 6. cxb8=Q+ Nxb8+ 7. Kb6 Nd7+ 8. Kc7 +- 6. Rg8 Rxc7 7. Rxd8+ Rc8 8. Rxc8#

Related study: Study 106

Study 106b

Árpád Rusz
StrateGems
2016
3rd Prize
- version -

White wins

1. Rg8+! Thematic try: 1. Rh8+? Rd8 2. Rxd8+ Nxd8 3. c7 Rb3+ 4. Ka6 Rb8! mutual zugzwang 5. Rf6 (5. Rh6 Nf7 6. cxb8=Q+ Kxb8 =) 5... Nc6! 6. cxb8=Q+ (6. Rxc6 Rb6+! 7. Kxb6 stalemate) 6... Nxb8+ 7. Kb6 Nd7+ =; 1. Rxe6?? Rcxc6+ -+ 1... Rd8 1... Nd8 2. Rxd6 +- 2. Rxd8+ Nxd8 3. c7 Rb3+ 3... Nf7 4. Rh3! +- 4. Ka6 Rb8! self-fork (4... Ra3+ 5. Kb5 Rb3+ 6. Ka4! (6. Kc4? Rb8! 7. Rh8 Rc8 The black rook is pinning the pawn! 8. Rxd8 Kb7=) 6... Rb8 7. Rh8 +-)

5. Rg6!! mutual zugzwang 5. Rf6? Nc6! 6. cxb8=Q+ (6. Rxc6 Rb6+ 7. Kxb6 stalemate) 6... Nxb8+ 7. Kb6 Nd7+ = 5... Rc8 (5... Nf7 6. cxb8=Q+ Kxb8 7. Rg8+ Kc7 8. Rg7 +-; 5... Nc6 6. cxb8=Q+ Nxb8+ 7. Kb6 Nd7+ 8. Kc7 +- 6. Rg8 Rxc7 7. Rxd8+ Rc8 8. Rxc8#

Related study: Study 106

Thursday, 22 June 2017

Study 119

Árpád Rusz
Polášek-Vlasák-60 JT
2017
2nd Commendation

White wins

1. Rh2 1. Rd2? Be7! (1... Bc7? 2. Rd5+ Kg4 3. Bg7 Bf4 4. Kf1! Kf3 5. Rd3+ Ke4 6. Rd4+ Kf3 7. Rxf4+! R sacrifice Kxf4 8. h6 Ke4 9. h7 Ra8 10. h8=Q Rxh8 11. Bxh8 Kd5 12. Bd4! B sacrifice 12... Kxd4 13. c6 +-) 2. Rd5+ Kg4 (2... Kh4? 3. Bg7 Bg5 4. h6 Bxh6 5. Bxh6 Rxh6 6. Kf2 Re6 7. Kf3 +-) 3. Bg7 Bg5 4. Rxg5+ R sacrifice (4. h6 Bxh6 5. Bxh6 Rxh6 =) 4... Kxg5 5. h6 Kg6 = 1... Kh6 1... Rh6 2. Bc1+ +-; 1... Bc7 2. Rh1 Ra2 3. Bd4 Kh6 4. Be3+ +- 2. Bc1+ Bg5 3. Bxg5+ Kxg5

4. Rh1!! 4. h6? Ra1+! 5. Kg2 Ra2+ 6. Kg3 Ra3+ 7. Kf2 Ra2+ 8. Kg3 Ra3+ perpetual check - chameleon echo; 4. Rc2? Kxh5 5. c6 Ra8 6. c7 Rc8 = 4... Ra2 4... Ra1+ 5. Kg2! +- (5. Kh2? Ra5 6. Rc1 Kxh5 7. c6 Ra8 8. c7 Rc8 =) 5. h6 5. c6? Kh6 = 5... Kg4 6. c6! 6. h7? Ra1+ 7. Kg2 Ra2+ 8. Kf1 Ra1+ 9. Kg2 Ra2+ perpetual check - chameleon echo 6... Kg3 7. Kf1 Ra1+ 8. Ke2 Rxh1 9. c7 Rc1 10. h7 +-

Monday, 5 June 2017

Study 118

Árpád Rusz
Boris Oleynik MT
2017

White wins

1. Bg6 e4! 2. Qxe4! 2. Bxe4? Be6+ 3. Kd3 Bf5! 4. Bxf5 (4. Kc2 c4! 5. Bxf5 b1=Q+ 6. Kxb1/Qxb1 stalemate) 4... b1=Q+ 5. Qxb1 c4+ 6. Kd2 stalemate; 2. Kd5? Kxa2 3. Bxe4 Bb7+ 4. Kc4 Bxe4 and white has nothing better than 5. Qa1+! Kxa1 stalemate 2... Bf5! The black bishop slides between two enemy pieces. I have coined a new term for this motif: this is the "Sandwich Theme"!


Sandwich Theme

2... b1=Q 3. Qxb1 Be6+ 4. Kd3 Bf5+! 5. Kd2! (5. Bxf5? c4+ 6. Kd2 stalemate) 5... Bxb1 6. Bxb1 +- 3. Qxf5! Thematic try: 3. Bxf5? b1=Q 4. Qxb1 stalemate 3... b1=Q


a Queen battery

4. Qxc5+!! White fires the Queen battery! 4. Qxb1? stalemate 4... bxc5 5. Bxb1 +-

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Tuesday, 23 May 2017

Study 117

Árpád Rusz
5th UAPA Ty
2017
- after P. Joița -

Draw

1. b7! 1. Nxf4+? Kh2! (1... Kh4? 2. Bf5! Rxd6+ 3. Ng6+ =) 2. b7 (2. Bf5 Rxd6+ -+) 2... Rb3! (2... Rxb7? 3. Nh5 Rf3 4. Be4 =) 3. Be4 Rxd6+ 4. Kg7 (4. Kg5 Kg3 -+) 4... Rd4 -+ 1... Rxb7 1... Rb3 2. Nc5 = 2. Nxf4+ Kg4 2... Kh2 3. Nh5 Re3 (3... Rf3 4. Be4 =) 4. Nf6 (4. Bf5? Rb6 -+) 4... Re6 5. d7! (5. Ne4? Rb1! 6. d7 Rd1 -+)

3. d7!! 3. Nh5? Rg1! 4. d7 Rd1! -+ 3... Rxd7 4. Nh5! Rh3 4... Rf3 5. Nf6+! Rxf6 stalemate

5. Bf5+! Kxf5 stalemate

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Study 116

Árpád Rusz
5th UAPA Ty
2017

Draw

1. f3+! 1. Rb6? Qh3+ -+; 1. Rb4+? Kd3 2. Bf6 Qf5+ (2... Qd5+? 3. Ke8! Qe6+ 4. Be7 =) 3. Ke7 Qc5+ -+; 1. Kc6? Qd5+ -+ 1... Qxf3 2. Kc6! 2. Kd6? Qd1+ -+ 2... Kd3+! 3. Kb5 Qd5+ 4. Ka4! Kc4 5. Ka3 5. Ba5? Qd1 -+ 5... Qd1 6. Rb6! 6. Rb7? Qd6+ 7. Kb2 Qh2+ 8. Ka3 Kxc3 -+ 6... Qh1 6... Kxc3 7. Rc6+ Kd3 8. Rd6+ =; 6... Qc1+ 7. Ka2! (7. Bb2? Qe3+ -+) 7... Qc2+ 8. Bb2 = 7. Rb3 7. Bb2? Qa8+ 8. Ra6 Qxa6#; 7. Ba5? Qa1# 7... Qa8+ 7... Qd1 8. Rb6 positional draw 8. Kb2 Qg2+ 9. Ka3 Qc2


echo

10. Rb4+! 10. Rb6? Qxc3+ -+ 10... Kxc3 11. Rc4+! Kxc4 stalemate


echo stalemate


On move four, white had another square for the king.
Thematic try: 4. Kb4? Qc4+? 5. Ka3 Kc2


echo

6. Rb2+ Kxc3 7. Rc2+! Kxc2 stalemate


echo stalemate

The 4. Kb4? thematic try is refuted by 4... Qd6+! 5. Ka4 (5. Kb5 Kc2 -+) 5... Kc4 6. Ba5 Qd1 -+

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Friday, 19 May 2017

Study 115

Árpád Rusz
Polášek-Vlasák 60 JT
2017
4th Prize

White wins

1. d7 Ne4+! 1... Rh5+ 2. Kg4 +- 2. Kf5! 2. Kf4? Rh4+ 3. Ke5 Rg5+ = 2... g6+! 3. Kxe4 3. Ke5? Re7+ = 3... Rg4+! 3... Rxd7 4. Rxd7 Rg4+ 5. Kd3 Rxa4 6. Rb7+ Kc1 7. Nc3 +- 4. Kf3 Rxd7! 5. Nc3!! 5. Rxd7? Rxa4 =; 5. Rxg4? Rxd1 =


Grip Theme with sacrifice

5... Kxc3 5... Rxa4 6. Nxa4+ Kc2 7. Rxd7 +-; 5... Rxd1 6. Nxd1+ Kb3 7. Rxg4 +- 6. Ra3+! Kb2 7. Rxd7 +-

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Wednesday, 10 May 2017

Study 114

Árpád Rusz
RCS blog
2017
after Gijs van Breukelen

White wins

This is my version of a really famous study (see for example this link.). I have added a thematic try and a heart-shaped Rundlauf but the core of the study of course belongs to Gijs van Breukelen.

1. Nh5+!! Thematic try: 1. Ne6+? Kg6 2. Bc2+ Kh5 3. d8=Q Nf7+ and it is a draw because the e6 square is blocked by the harmful white knight! 1... Kg6 2. Bc2+! Kxh5 2... Kf7 3.d8=Q +- 3. d8=Q Nf7+ 4. Ke6! The e6 square was empty! 4...Nxd8+ 5. Kf5 e2 6. Be4 e1=N! 6... e1=Q 7. Bf3# 7. Bd5! c2 8. Bc4 c1=N! 9. Bb5 Nc7 10. Ba4! +-

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Study 106a

Árpád Rusz
StrateGems
2016
3rd Prize
- version -

White wins

This version has a better key (1.c7) than the original study (1.bxc7). It also has a slightly nicer initial position. The drawback is that the second variation is gone. It is not an easy task to decide which version is the best...

1. c7 Bc5+! 1... Be5+ 2. Kxe5 Nc6+ 3. Kd6 Kb7 4. Be4 Rd1+ 5. Bd5 +- 2. Kxc5 Rc1+ 2... Ne6+ 3. Kb6 +- 3. Bc2! unguarded guard 3. Kb6? Rc6+ 4. Kb5 Rxc7 = 3... Rxc2+ 4. Kb6 Rb2+ 4... Nf7 5. Rh2! Rxh2 6. c8=Q# 5. Ka6 Rb8! self-fork 5... Ra2+ 6. Kb5 Rb2+ 7. Ka4 Rb8 8. Rh8 +-

6. Rg6!! 6. Rf6? Nc6! 7. cxb8=Q+ (7. Rxc6 Rb6+! 8. Kxb6 stalemate) 7... Nxb8+ 8. Kb6 Nd7+ = 6... Rc8 7. Rg8 Rxc7 8. Rxd8+ Rc8 9. Rxc8#

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Related study: Study 106

Tuesday, 9 May 2017

Study 109a

Árpád Rusz
Magyar Sakkvilág
2016
- after Hlinka & Kekely -
Special Commendation
(version)

White wins (BTM)

1... d1=Q 2. Rb8+ Kc5! 2... Kxc4 3. Rh4+ +- 3. Rb5+ 3. d8=Q? Qac2+ -+ 3... Kxc6 4. d8=N+! Qxd8 5. Nd5! Qc2+ 5... Qxc4 6. e7+ +- 6. Be2 Qxf5+ 7. Ke1 Qdxd5! 7... Qfxd5 8. e7+ +- 8. e7+ Kd7 9. e8=Q+! Kxe8 10. Rh5!!


Grip Theme

10... Qxb5 10... Qxh5 11. Bxh5+ Ke7 12. Rxd5 +- 11. Bxb5+ Ke7 12. Rxf5 +-

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Related studies: Study 109

Saturday, 6 May 2017

Study 113

Árpád Rusz
Boris Oleynik MT
2017

White wins

1. Ng3! 1st thematic try: 1. Ne3? Kb3 2. h4 Kxc3 3. Nd1+ Position X' 3... Kd2! Better than 3...Kd3? which leads to a check. 4. Nxf2 No check! 4... c3! 5. Ne4+ Ke3! 6. Nxc3 Kf4 = 1... Kb3 2. h4 Kxc3 3. Ne4+ Position X 3... Kd3 Unlike in the 1st thematic try, the black king had no access to the d2 square so moving to d3 is the only option. 4. Nxf2+ Check! 4... Ke2 4... Ke3 5. Ng4+ Kd2 6. Nh2! (6. Ne5? c3 7. Nc4+ Kd3 8. Na3 Ke4 =) 6... c3 7. Nf1+! Ke2 (7... Kd3 8. Kxa2 c2 9. Kb2 +-) 8. Kxa2 c2 9. Kb2 Kd1 10. Ne3+ +-

5. Nh1!! 2nd thematic try: 5. Ne4? Kf3 6. h5 Kxe4 7. h6 c3 8. Kxa2 Position Y' 8... Kd3! Black has to avoid moving to the e3 square! 9. h7 c2 10. h8=Q c1=Q = 5... c3 5... Kf3 6. h5 c3 7. Kxa2 +- 6. Ng3+ Kf3 7. Kxa2! Kxg3 7... Kg4 8. h5 +- 8. h5

8... Kf4! Réti manoeuvre 9. h6 Position Y 9... Ke3 Unlike in the 2nd thematic try, the black king had no access to d3, therefore it could not avoid moving to the mined square e3... 10. h7 c2 11. h8=Q c1=Q 12. Qh6+! +- Boom!

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Tuesday, 2 May 2017

Study 112

Árpád Rusz
5th FIDE World Cup
2017
2nd Commendation

Draw

In the initial position there is a pawn battery but unfortunately it is blocked by the black queen. Therefore, the white queen leaves the a1 square but not without saying: "I'll be back!" 1. Qg1+ Ke4! Black is trying to avoid the capture of the white pawn. 2. Qg4+! Kd5 2... Kxe5 3. Nc4+ +- 3. Qd7+ Kxe5 3... Ke4 4. Qg4+ perpetual check 4. Qxa7! Only now is possible to take that knight, after the black king has moved to e5. 4... a1=Q 4... Qd1+ 5. Ke8! = 5. Nc4+! White fires the knight battery. This check was the reason why black tried to avoid capturing the e5-pawn. 5... Qxc4 6. Qxa1 The queen returns to a1 and rebuilds the pawn battery which, unlike in the initial position, is not blocked anymore.


Rundlauf

6... f5! Black is not afraid of the white battery!


refusal to attack

7. b4+!! White refuses to attack the black queen! Thematic try: 7. b3+? Qd4+ 8. Qxd4+ Kxd4 -+ 7... Qd4+ 8. Qxd4+ Kxd4 9. Kc7! White is starting a Réti manoeuvre to catch the black pawn! 9. b5? Kc5 10. Kc7 Kxb5 11. Kd6 f4 -+; 9. Kd7? f4 10. b5 Kc5 -+ 9... Kc4 9... f4 10. b5 f3 11. b6 f2 12. b7 f1=Q 13. b8=Q = 10. Kc6! Kxb4 10... f4 11. b5 = 11. Kd5 = Done!

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Friday, 7 April 2017

Sacrifices 1

S. Nielsen
e4e5
2016
3rd Prize

Draw

1. Re7 1. a7? c1=Q -+ 1... Re4! 1... Rf5 2. a7 = 2. a7! 2. Rxe4? c1=Q -+ 2... Bc6 3. Rxe4 c1=Q 4. Re8+! Bxe8 5. a8=Q Bxf7+ 5... Qd1+ 6. Kh6 g4+ 7. Kh5 Bxf7+ (7... g3+ 8. Kh4 =) 8. Kh4 Kxh7 9. Qe4+ Kg8 10. Qxg4+ = 6. Kh6 Qc6+! 6... g4+? 7. Bf4+ +-; 6... Qh1+? 7. Bh2+! (7. Qxh1? g4+ 8. Bf4 Bxf4#) 7... Qxa8 8. Be5# 7. Bd6+! 7. Qxc6? g4+ 8. Bf4 Bxf4# 7... Be8 7... Qxa8 8. Be5# 8. Qa1+ 8. Qxc6? g4+ 9. Bf4 Bxf4#; 8. Qxe8+? Qxe8 -+ 8... Bc3 9. Qxc3+! Qxc3 10. Be5+ Qxe5 stalemate

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Banny 5

A. Skripnik & P. Arestov
e4e5
2016
2nd Prize

White wins

1. Ne1+ Kf2 2. Nxg2 f3! 2... Bxb5 3. Nxf4 +- 3. Rxf7! Bd3+ 4. Kg8!! Thematic try: 4. Kh8? Kxg2 5. a7 Be4 6. b6 f2 7. b7 Bxb7! 8. Rxb7 f1=Q 9. a8=Q Qf3!


mutual zugzwang (WTM)

10. Kg8 Qd5+! 11. Kh8 Qf3! 12. Rb2+ (12. Rg7+ Ng3 =) 12... Nf2 =) (4. Kg7? Kxg2 5. a7 Be4 6. b6 f2 7. b7 Bxb7 8. Rxb7 f1=Q 9. a8=Q Kg1! (9... Qf3? 10. Kh8! +- main line) 10. Qa7+ Nf2 (10... Qf2 $2 11. Qa1+ Kg2 12. Rb2 $18) 11. Rb2 Qg2+ = 4... Kxg2 4...Bxb5 5. a7 Bc6 6. Nh4 +- 5. a7 Be4 6. b6 f2 7. b7 Bxb7 8. Rxb7 f1=Q 9. a8=Q Qf3

10. Kh8! Banny Theme


mutual zugzwang (BTM)

10. Rg7+? (A) Ng3! = (a)
10. Rb2+? (B) Nf2! = (b)

10... Ng3 (a) 11. Rb2+ (B) Ne2 12. Rxe2+ +- Roman Theme
10... Nf2 (b) 11. Rg7+ (A) Ng4 12. Rxg4+ +- Roman Theme

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Domination 1

A. Zhukov
e4e5
2016
1st Prize

White wins (BTM)

1... d6+ 2. Nd7 Nf6+ 2... Qe4+ 3. Kg8 +- 3. Kg7 Nxd7 4. Be3+! 4. Qa7? Nxc5+ 5. Qxb7 Nxb7 = 4... Kf5! 5. Qc2+! 5. Qb5? Nb6+ 6. Kh6 Qe7 =; 5. Qb3? d5 6. Qd3+ e4 = 5... e4

6. Qc7!! Qxc7 7. Nb5!


domination

7... Qb6! 7... Qb7 8. Nxd6+ +-; 7... Qc6 8. Nd4+ +-; 7... Qb8 8. Nd4+ Ke5 9. Nc6+ +- 8. Bxb6 8. Nd4+? Ke5 9. Nxf3+ exf3 10. Bxb6 Nxb6 = 8... Nxb6 9. Nxd6+ Kf4! 10. Nxe4!! Thematic try: 10. h4? e3 11. fxe3+ Ke5!! (11... Kxe3? 12. Nf5+ Kf4 13. Ng3 +-) 12. Nf7+ Kd5! 13. e4+! Kd4! 14. Nd6 f2 15. Nf5+ Kxe4 16. Ng3+ Kf3 17. h5 Kg2 18. h6 Kxh2 19. Nf1+ Kg1(2) 20. h7 (20. Nd2 Nc4! =) 20... Kxf1 21. h8=Q Kg2(1) =


position B

10... Kxe4 11. h4! Kd3 12. h5 Ke2 13. h6 Kxf2 14. h7 Kg2 15. h8=Q 15. h8=R? Nd5 16. b5 Nc7 17. b6 Ne6+ 18. Kh6 f2 = 15... f2 Unlike position B from the end of the thematic try, now we have an extra pawn on h2.


position A

16. Qf8! +-

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e4e5-2016 Provisional Award

I have finished judging the e4e5-2016 tourney for endgame studies. The Provisional Award can be downloaded in pgn or pdf format. Below you can see the prize winning works.

1st Prize
2nd Prize
3rd Prize

Wednesday, 29 March 2017

Study 111

Árpád Rusz
5th UAPA Ty
2017

Win

1. Rf7+! 1. gxh7? Rb8! (1... Rh5? 2. Ra4+ Ke3 3. Ra3+ Ke4 4. Rh3 +-) 2. Rf7+ Kg5! (2... Ke5? 3. Kf3 Ke6 4. Rb7! rook sacrifice 4... Rh8 5. Kg4 Kf6 6. Kh5 +-) 3. Rg7+ Kh6 4. Rg8 Rb2+ =; 1. g7? Rg5+ 2. Kf2 Rg6! = (2... Kg4? 3. Ra1! Rxg7 4. Rg1+ +-; 2... h5? 3. Ra4+ Kf5 4. Ra5+ +-) 1... Kg4 1... Kg5 2. g7 Rb8 3. Rf8 +-; 1... Ke4 2. gxh7 Rh5 3. Kg3 Ke5 4. Kg4 +- 2. g7! Rg5

3. Kh1!! Thematic try: 3. Kh2? h5 4. Rf1 Rxg7 5. Rg1+ Kh4! 6. Rxg7 stalemate


chameleon echo stalemate

3... h5 3... Rh5+ 4. Kg1! Rg5 5. Rf2 Kh3+ (5... Kh4+ 6. Rg2 +-) 6. Kh1 Rxg7 7. Rh2+ Kg4 8. Rg2+ +-; 3... Kh4 4. Rf4+! (4. Rf2? Rxg7 5. Rh2+ Kg5 =) 4... Kh5 5. Rf5! +- rook sacrifice 4. Rf2! Thematic try: 4. Rf1? Kh3! (4... h4? 5. Kh2! Rxg7 6. Rg1+ +-) 5. Rg1 h4! 6. g8=Q Rxg8 7. Rxg8 stalemate


chameleon echo stalemate

4... h4 5. Kh2! Rxg7 6. Rg2+ +-

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Monday, 6 March 2017

Study 110

Árpád Rusz
RCS blog
2017

Win

1. Nfe5 Rxe3! 2. Nc4+! 2. Kxe3? Kxb3 = 2... Ka2! Triangulation by the black king! If black captures the pawn immediately, the win is much easier: 2... Kxb3 3. Nxe3 Ka3 4. Kc3 Ka4 5. Kc4 Ka3 6. Nd4 Ka4 7. Nb3 Ka3 8. Nc5 +- etc.) 3. Nxe3 Kxb3 The pawn is securely blockaded by a white knight exactly on the Troitzky line, so by the theory, white must win. The win is surprisingly difficult: white can win only by reaching the same position but with black to move! This can be done only by an 45-move-long manoeuvre!! The play is determined except some duals which can be regarded as minor ones.


cyclic zugzwang - WTM

4. Nd8 The minor duals 4. Ne5 Kb4 5. Ng6 Kb5 6. Nf4; 4. Ne7 Kb4 5. N7d5+ (5. Ng6 Kb5 6. Nf4) 5... Kb5 6. Ke5 (6. Nf4) 6... Kc6 7. Nf4 are all quickly reaching the main line 4... Kb4 5. Ne6 Kb5 6. Nf4 Kc6 7. Ke5 Kd7 8. Kd5 Kc7 9. Ke6 Kc6 10. Ne2! Kc5 11. Kd7 Kb6 12. Kd6 Kb5 13. Kd5!


critical position A

13... Kb6 13... Kb4 14. Kc6 +- 14. Nd4 Kb7 15. Ke6 Ka6 16. Ne2! Kb7 17. Kd6 Kc8 18. Nf4 minor dual 18. Nd4 Kd8 19. Nc6+ Kc8 20. Na5 Kd8 21. Nb7+ Ke8 22. Ke6 Kf8 23. Nd6 etc. reaching the main line 18... Kd8 19. Ne6+/Nh3 Ke8 20. Ng5 Kd8 21. Nf7+ Ke8 22. Ke6 Kf8 23. Nd6 Kg7 24. Kf5 Kh7 25. Kf6 Kh6 26. Ndf5+/Nb5 Kh5 27. Ng3+/Nd4 Kh4 28. Ne2! Kh5 29. Kf5!This position looks like position A but reflected vertically!


critical position B

29... Kh6 The black king has to return... 29... Kh4 30. Kg6 +- 30. Nf4 Kg7 31. Ke6 Kf8 32. Nh5 Ke8 33. Ng7+ Kd8 34. Kd6 Kc8 35. Ne6 Kb7 36. Kc5 Ka6 37. Kc6 Ka5 38. Nc7/Nd4 Kb4 39. Nb5 Ka4 40. Kc5 Kb3 41. Kd4 Kb4 42. Nc7 Ka5 43. Kc5 Ka4 44. Ncd5 Ka5 45. Nb4 Ka4 46. Nc6 Ka3 47. Kd5!! Triangulation by white king! After 47. Kd4? Kb3 one has to start another 45-move long manoeuvre... 47... Kb3 48. Kd4! +-


cyclic zugzwang - BTM

This study features the longest known cyclic zugzwang (45 moves). That is an amazing new record! The study participated in the Troitzky-150 MT but it seems like the judge was not impressed enough to award it.

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