Mate in 14

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acase
Posts: 994
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Mate in 14

Post by acase »

In this position we have a mate in 14, it's notable that black can only move his Black square Bishop back and forth on the h2 and g1 squares otherwise the mate comes earlier. This position is from "The Puzzle King" himself, none other than Sam Loyd. The correct moves are 1. Kc5 Bg1 2. Kb6 Bh2 3. Ka7 Bg1 4. Ka8 Bh2 5. Kb8 Bg1 6. Kc7 Bh2 7. Kd8 Bg1 8. Ke7 Bh2 9. Kf8 Bg1 10. Kg7 Bh2 11. Kh6 Bg1 12. Kg5 Bh2 13. Kxh4 Bg1
14. Rxg3# 1-0

Unless of course there is another solution.


[d]8/8/5N2/8/3K1N1p/1p3knR/1Pp2prb/n1B2b1B w - - 6 1
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Dann Corbit
Posts: 12768
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Mate in 14

Post by Dann Corbit »

I have this:
[d]8/8/5N2/8/3K1N1p/1p3knR/1Pp2prb/n1B2b1B w - - acd 29; acs 1; bm Kc5; c1 "#14; @ C2/R0/K1/P2/X6;"; c3 "Kc5"; ce 32740; dm 14; id "yacpdb id 67633"; pm Kc5; pv Kc5 Bg1 Kb6 Bh2 Ka7 Bg1 Ka8 Bh2 Kb8 Bg1 Kc7 Bh2 Kd8 Bg1 Ke7 Bh2 Kf8 Bg1 Kg7 Bh2 Kh6 Bg1 Kg5 Bh2 Kxh4 Bg1 Rxg3+;
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fastgm
Posts: 818
Joined: Mon Aug 19, 2013 6:57 pm

Re: Mate in 14

Post by fastgm »

Fire 7.1 finds the following checkmate in 14 moves:

[d]8/8/5N2/8/3K1N1p/1p3knR/1Pp2prb/n1B2b1B w - - 6 1
Fire 7.1 x64 popcnt:
46 12:21 20.312.199.507 27.408.324 +M14 1.Ke5 Bg1 2.Ng8 Kg4 3.Nh6+ Kf3 4.Nf5 Bh2 5.Ne3 Bg1 6.Nxf1 Kg4 7.Bxg2 Kg5 8.Ke6 Bh2 9.Rxh2 Kh6 10.Nxg3 Kg7 11.Rxh4 Kg8 12.Nf5 f1Q 13.Bxf1 Kf8 14.Rh8+
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Jouni
Posts: 3611
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Mate in 14

Post by Jouni »

Crystal shows mate in 14 instantly :

Analysis by Crystal 270819 64 BMI2:

1.Kc5 Bg1 2.Kb6 Bh2 3.Ka7 Bg1 4.Ka8 Bh2 5.Kb8 Bg1 6.Kc7 Bh2 7.Kd6 Bg1 8.Ke7 Bh2 9.Kf8 Bg1 10.Kg7 Bh2 11.Kh6 Bg1 12.Kg5 Bh2 13.Kxh4 Bg1 14.Rxg3#
+- (#14) Depth: 12/31 00:00:00 710kN only solution

Believe me Crystal is clearly the best matefinder even with some issues!
Jouni
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acase
Posts: 994
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Mate in 14

Post by acase »

fastgm wrote: ↑Sat Feb 29, 2020 1:33 pm Fire 7.1 finds the following checkmate in 14 moves:

[d]8/8/5N2/8/3K1N1p/1p3knR/1Pp2prb/n1B2b1B w - - 6 1
Fire 7.1 x64 popcnt:
46 12:21 20.312.199.507 27.408.324 +M14 1.Ke5 Bg1 2.Ng8 Kg4 3.Nh6+ Kf3 4.Nf5 Bh2 5.Ne3 Bg1 6.Nxf1 Kg4 7.Bxg2 Kg5 8.Ke6 Bh2 9.Rxh2 Kh6 10.Nxg3 Kg7 11.Rxh4 Kg8 12.Nf5 f1Q 13.Bxf1 Kf8 14.Rh8+
Very interesting, an alternate solution, thanks for posting that.
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Jouni
Posts: 3611
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Mate in 14

Post by Jouni »

Wrong as I said.
Jouni
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fastgm
Posts: 818
Joined: Mon Aug 19, 2013 6:57 pm

Re: Mate in 14

Post by fastgm »

Crystal 270819 and Deep Rybka 4.1 confirms the alternate solution in MV-Mode:

Crystal 270819 64 BMI2:

40/27 01:35 5.624.896.604 58.630.538 +M14 1.Ke5 Bg1 2.Ng8 Bh2 3.Nh6 Bg1 4.Nf5 Bh2 5.Ne3 Bg1 6.Nxf1 Kg4 7.Bxg2 Kg5 8.Ke6 Bh2 9.Nd5+ Kg6 10.Rxh4 Nh5 11.Ne7+ Kg7 12.Rg4+ Kh8 13.Rg8+ Kh7 14.Be4+
40/27 01:35 5.624.896.604 58.630.538 +M14 1.Kc5 Bg1 2.Kb6 Bh2 3.Ka7 Bg1 4.Ka8 Bh2 5.Kb8 Bg1 6.Kc7 Bh2 7.Kd8 Bg1 8.Ke7 Bh2 9.Kf8 Bg1 10.Kg7 Bh2 11.Kh6 Bg1 12.Kg5 Bh2 13.Kxh4 Bg1 14.Rxg3+

-----------------------------

Deep Rybka 4.1 SSE42 x64:

32 04:23 335.711.633 1.272.459 +M14 1.Kc5 Bg1 2.Kb6 Bh2 3.Ka7 Bg1 4.Ka8 Bh2 5.Kb8 Bg1 6.Kc7 Bh2 7.Kd6 Bg1 8.Ke7 Bh2 9.Kf8 Bg1 10.Kg7 Bh2 11.Kh6 Bg1 12.Kg5 Bh2 13.Kxh4 Bc4 14.Bxg2+
32 02:50 208.502.301 1.225.575 +M14 1.Ke5 Bg1 2.Ng8 Bh2 3.Nh6 Bg1 4.Nf5 Bh2 5.Ne3 Bg1 6.Nxf1 Kg4 7.Bxg2 Kg5 8.Ke6 Ne2 9.Nxe2+ Kg6 10.Be4+ Kg7 11.Bh6+ Kxh6 12.Kf6 Kh5 13.Bf3+ Kh6 14.Rxh4+
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