Another busted test position

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Jouni
Posts: 3661
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Another busted test position

Post by Jouni »

[d]3q3N/1p5k/5B2/8/1p2p1Rp/1P5K/p3PP2/8 w - - 0 1 claimed best move Rg7+

but Rxh4+ wins as well - very difficult zugzwang lines

1.Rxh4+ Kg8 2.Rg4+ Kh7 3.Rg7+ Kxh8 4.Ba1 Qa8 5.f4 Qa3 6.f5 e3 7.Kh2 Qxb3 8.f6 Qe6 9.Kg1 Qf5 10.f7 Qf2+ 11.Kh1 Qh4+ 12.Kg2 Qf2+ 13.Kh3 Qf1+ 14.Kh4 Qf2+ 15.Kg5 Qg1+ 16.Kf5 Qb1+ 17.Ke6 Qe4+ 18.Kd6 Qf4+ 19.Ke7 Qe4+ 20.Kf8 Qc2 21.Rg4+ Kh7 22.Rh4+ Kg6 23.Kg8 Qb3 24.Rf4 Kh5 25.Rf6 Kh4 26.Kh8 Qxf7 27.Rxf7 Kg3 28.Rxb7 Kf2 29.Rxb4 Kg3 30.Rb3 Kf2 31.Ra3 Kxe2
+- (199.38) Depth: 62/80 00:00:39 488mN, tb=1714931
Jouni
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ernest
Posts: 2053
Joined: Wed Mar 08, 2006 8:30 pm

Re: Another busted test position

Post by ernest »

Google search :D --->
Peter Krug and Mario Garcia
2015
1st-2nd prize
1-0
ChessStar-2015
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peter
Posts: 3412
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Another busted test position

Post by peter »

Jouni wrote: ↑Fri Dec 01, 2023 10:38 pm [d]3q3N/1p5k/5B2/8/1p2p1Rp/1P5K/p3PP2/8 w - - 0 1 claimed best move Rg7+

but Rxh4+ wins as well - very difficult zugzwang lines

1.Rxh4+ Kg8 2.Rg4+ Kh7 3.Rg7+ Kxh8 4.Ba1 Qa8 5.f4 Qa3 6.f5 e3 7.Kh2 Qxb3 8.f6 Qe6 9.Kg1 Qf5 10.f7 Qf2+ 11.Kh1 Qh4+ 12.Kg2 Qf2+ 13.Kh3 Qf1+ 14.Kh4 Qf2+ 15.Kg5 Qg1+ 16.Kf5 Qb1+ 17.Ke6 Qe4+ 18.Kd6 Qf4+ 19.Ke7 Qe4+ 20.Kf8 Qc2 21.Rg4+ Kh7 22.Rh4+ Kg6 23.Kg8 Qb3 24.Rf4 Kh5 25.Rf6 Kh4 26.Kh8 Qxf7 27.Rxf7 Kg3 28.Rxb7 Kf2 29.Rxb4 Kg3 30.Rb3 Kf2 31.Ra3 Kxe2
+- (199.38) Depth: 62/80 00:00:39 488mN, tb=1714931
Correct, so this Krug- Garcia- study has a major dual, in HHdbVI 1.Rxh4+ still has ?, regards
Peter.
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ImNotStockfish
Posts: 56
Joined: Tue Sep 14, 2021 12:29 am
Full name: .

Re: Another busted test position

Post by ImNotStockfish »

Jouni wrote: ↑Fri Dec 01, 2023 10:38 pm [d]3q3N/1p5k/5B2/8/1p2p1Rp/1P5K/p3PP2/8 w - - 0 1 claimed best move Rg7+

but Rxh4+ wins as well - very difficult zugzwang lines

1.Rxh4+ Kg8 2.Rg4+ Kh7 3.Rg7+ Kxh8 4.Ba1 Qa8 5.f4 Qa3 6.f5 e3 7.Kh2 Qxb3 8.f6 Qe6 9.Kg1 Qf5 10.f7 Qf2+ 11.Kh1 Qh4+ 12.Kg2 Qf2+ 13.Kh3 Qf1+ 14.Kh4 Qf2+ 15.Kg5 Qg1+ 16.Kf5 Qb1+ 17.Ke6 Qe4+ 18.Kd6 Qf4+ 19.Ke7 Qe4+ 20.Kf8 Qc2 21.Rg4+ Kh7 22.Rh4+ Kg6 23.Kg8 Qb3 24.Rf4 Kh5 25.Rf6 Kh4 26.Kh8 Qxf7 27.Rxf7 Kg3 28.Rxb7 Kf2 29.Rxb4 Kg3 30.Rb3 Kf2 31.Ra3 Kxe2
+- (199.38) Depth: 62/80 00:00:39 488mN, tb=1714931
The best move is still the same one, Rg7+. Rxh4+ simply wastes 2 moves.
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Vinvin
Posts: 5298
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Another busted test position

Post by Vinvin »

Rg7+ seems a bit shortert to mate than Rxh4+

Code: Select all


The Huntsman 1 avx2:
---------------------------------------------------------------------------
 74/90	18:23	 51.170.750k	46.364k	+M45	1.Rxh4+ Kg8 2.Rg4+ Kh7 3.Rg7+ Kxh8 4.Ba1 Qa8 5.f4 Qa3 6.f5 e3 7.Kh2 Qxb3 8.f6 Qe6 9.Kg1 Qf5 10.f7 Qf2+ 11.Kh1 Qh4+ 12.Kg2 Qf2+ 13.Kh3 Qf5+ 14.Kh4 Qf2+ 15.Kg5 Qg1+ 16.Kf5 Qb1+ 17.Ke6 Qe4+ 18.Kd6 Qc6+ 19.Ke7 Qc7+ 20.Ke6 Qc8+ 21.Kf6 Qc6+ 22.Kf5 Qd7+ 23.Kf4 Qd6+ 24.Kxe3 Qc5+ 25.Kf3 Qf5+ 26.Kg3 Qf1 27.Rg8+ Kh7 28.Rh8+ Kg6 29.f8Q Qg1+ 30.Kf3 Qf1+ 31.Ke3 Qg1+ 32.Kd2 Qg5+ 33.Kd3 Qf5+ 34.Ke3 Qxf8 35.Rxf8 Kg5 36.Kf3 Kg6 37.Rf6+ Kg7 38.Kf4 Kg8 39.Kg5 b3 40.Kg6 b2 41.Bxb2 a1Q 42.Bxa1 b5 43.Re6 Kf8 44.Bg7+ Kg8 45.Re8+
 74/90	18:23	 51.170.750k	46.364k	+M37	1.Rg7+ Kxh8 2.Ba1 Qa8 3.f4 exf3 4.exf3 Qc8+ 5.Kxh4 Qd8+ 6.Kh5 Qe8+ 7.Kh6 Qf8 8.f4 b6 9.Bb2 a1Q 10.Bxa1 b5 11.Be5 Qd6+ 12.Rg6+ Qxe5 13.Rg8+ Kxg8 14.fxe5 Kf7 15.Kg5 Ke6 16.Kf4 Kd7 17.Ke4 Ke6 18.Kd4 Kd7 19.Kc5 Ke6 20.Kxb4 Kxe5 21.Kxb5 Kd5 22.b4 Kd6 23.Kb6 Kd7 24.b5 Kc8 25.Ka7 Kd7 26.b6 Kc6 27.b7 Kd5 28.Kb6 Kd4 29.b8Q Ke3 30.Qf8 Kd2 31.Qf4+ Kd3 32.Kc5 Kc3 33.Qd4+ Kc2 34.Kc4 Kb1 35.Kc3 Ka2 36.Qf2+ Ka3 37.Qa7+
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