Interesting QPPvRR endgame

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Jack Lad
Posts: 8557
Joined: Wed Mar 08, 2006 10:01 pm
Location: UK

Interesting QPPvRR endgame

Post by Jack Lad »

[d] r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 33 122
Here white must play Qxh8 to win but is your engine willing to play it? :roll:
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Jouni
Posts: 3907
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Interesting QPPvRR endgame

Post by Jouni »

I don't have own engine, but ALL I tried play fast Qxh8 except Komodo :wink:
Jouni
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Dicaste
Posts: 151
Joined: Mon Apr 16, 2012 7:23 pm
Location: Istanbul, TURKEY

Re: Interesting QPPvRR endgame

Post by Dicaste »

Too strange position. I like it. Thanks for sharing and analysis from Houdini 2.0c x64

Code: Select all

New game
r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 0 1

Analysis by Houdini 2.0c x64:

122.Kb6 Raf8 123.Qe6+ Kd4 124.Qd6+ Ke4 125.Qe7+ Kd5 126.Qc5+ Ke4 127.Qe7+ Kd5 
  +-  (4.55)   Depth: 7/18   00:00:00  10kN
122.Kb6 Raf8 123.Qe6+ Kd4 124.Qd6+ Ke4 125.Qe7+ Kd5 126.Qc5+ Ke4 127.Qe7+ Kd5 
  +-  (4.55)   Depth: 8/18   00:00:00  14kN
122.Kb6 Raf8 123.Qg6+ Kd5 124.Kb7 Ra8 125.Qf5+ Kd4 126.Qh5 Ke4 127.Qg6+ Kd5 128.Qf5+ 
  +-  (4.54)   Depth: 9/20   00:00:00  34kN
122.Qf7 Ke5 123.Qg6 Kd5 124.Qf5+ Kd4 125.Qd7+ Ke5 126.Qd3 Ke6 127.Qc4+ Ke5 128.Qc3+ Kd5 129.Qc7 Kd4 130.Qd7+ Ke5 
  +-  (4.63)   Depth: 9/20   00:00:00  58kN
122.Qf7 Ke5 123.Qg6 Kd5 124.Qf5+ Kd4 125.Qc2 Kd5 126.Qd3+ Ke5 127.Qc3+ Kd5 128.Qc7 Kd4 129.Qd6+ Ke4 130.Qc6+ Kd4 131.Qc2 Kd5 
  +-  (4.63)   Depth: 10/20   00:00:00  68kN
122.Qf7 Ke5 123.Qg6 Kd5 124.Qf5+ Kd4 125.Qc2 Kd5 126.Qd3+ Ke5 127.Qc3+ Kd5 128.Qc7 Kd4 129.Qd6+ Ke4 130.Qc6+ Kd4 131.Qc2 Kd5 
  +-  (4.63)   Depth: 11/22   00:00:00  94kN
122.Qf7 Ke5 123.Qg6 Kd5 124.Qf5+ Kd4 125.Qc2 Kd5 126.Qc7 Kd4 127.Qb6+ Ke5 128.Qb5+ Kf6 129.Qb2+ Ke6 130.Qa2+ Kf6 131.Qb2+ Ke6 
  +-  (4.54)   Depth: 12/22   00:00:00  167kN
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Ke4 125.Qg4+ Ke5 126.Qg5+ Ke6 127.Qg7 Kf5 128.Qh6 Ke5 129.Qg5+ Ke6 
  +-  (4.49)   Depth: 13/26   00:00:00  388kN, tb=1
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Rcd8 127.Kb7 Ra8 128.Kc6 
  +-  (4.49)   Depth: 14/26   00:00:00  1062kN, tb=1
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Ke6 126.Qg6+ Ke5 127.Kb6 Rae8 128.Qg5+ Ke6 129.Qg1 Kf5 130.Qf1+ Ke5 131.Qb5+ Ke6 132.Qc4+ Ke7 
  +-  (4.49)   Depth: 15/30   00:00:00  1487kN, tb=3
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Rce8 127.Kb5 Ra8 128.Kb6 Ke6 129.Qg6+ Ke7 130.Qf5 Rae8 131.Qg5+ Ke6 132.Qg1 Kf5 133.Qf1+ Ke5 134.Qb5+ Ke6 135.Qc4+ Ke7 136.Qe2+ Kf6 137.Qf3+ Kg7 138.Qb7+ Kg6 
  +-  (4.49)   Depth: 16/34   00:00:01  2339kN, tb=10
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Rcf8 127.Kc5 Ra8 128.Kd6 Rad8+ 129.Kc6 Ke6 130.Kb6 Kf5 131.Kb7 Ra8 132.Kc6 
  +-  (4.49)   Depth: 17/35   00:00:01  3428kN, tb=26
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Ra8 127.Qf7+ Ke5 128.Qg6 Rad8 129.Qg7+ Ke6 130.Kc6 Ra8 131.Qg6+ Ke5 132.Kb6 Rad8 
  +-  (4.49)   Depth: 18/35   00:00:01  4907kN, tb=65
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Ra8 127.Kb7 Rhf8 128.Qg3 Rh8 129.Kb6 Ke4 130.Qg2+ Ke5 131.Qf3 Ke6 132.Qf4 Ke7 133.Qf5 Rae8 134.Qg5+ Ke6 135.Qg1 Kf5 136.Qf1+ Ke5 137.Qb5+ Ke6 138.Qc4+ Ke7 139.Qe2+ Kf6 140.Qf3+ Kg7 141.Qb7+ Kg6 
  +-  (4.49)   Depth: 19/38   00:00:01  6740kN, tb=131
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb6 Ra8 127.Kb7 Ke4 128.Kc6 Kf5 129.Kb6 Ke6 130.Qg6+ Ke7 131.Qf5 Rae8 132.Kb7 Ra8 133.Qg6 Rad8 134.Qg5+ Kf7 135.Qf4+ Kg6 136.Qe4+ Kg7 137.Qe7+ Kh6 
  +-  (4.49)   Depth: 20/41   00:00:03  14534kN, tb=430
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb5 Ra8 127.Kb6 Ke6 128.Qg6+ Ke5 129.Qg5+ Ke6 130.Qg7 Kd5 131.Qf6 Ke4 132.Qg6+ Ke5 133.Qg5+ 
  +-  (4.49)   Depth: 21/41   00:00:04  24363kN, tb=802
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb5 Ra8 127.Kb6 Ke6 128.Qg6+ Ke5 129.Qg5+ Ke6 130.Qg7 Kd5 131.Qf6 Rae8 132.Qf5+ Kd4 133.Qc5+ Ke4 134.Qc2+ Kd5 135.Qb3+ Kd6 136.Qd3+ Ke6 137.Qc4+ Ke7 138.Qc6 Kf7 139.Qc4+ Kf6 140.Qc3+ Kf7 141.Qf3+ Kg7 142.Qb7+ Kg6 
  +-  (4.49)   Depth: 22/41   00:00:05  29948kN, tb=1061
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb5 Ra8 127.Kb6 Ke6 128.Qg6+ Ke5 129.Qg5+ Ke6 130.Qg7 Kd5 131.Qf6 Rae8 132.Qf5+ Kd6 133.Qf3 Ke5 134.Qc3+ Ke6 135.Qg7 Ra8 136.Qg6+ 
  +-  (4.49)   Depth: 23/43   00:00:07  40793kN, tb=1455
122.Qf7 Ke5 123.Qg6 Kf4 124.Qg7 Kf5 125.Kc6 Rac8+ 126.Kb5 Ra8 127.Kb6 Ke6 128.Qg6+ Ke5 129.Qg5+ Ke6 130.Qg7 Kd5 131.Qf6 Rae8 132.Qf5+ Kd6 133.Qf3 Ke5 134.Qc3+ Ke6 135.Qg7 Ra8 136.Qg6+ 
  +-  (4.49)   Depth: 24/43   00:00:09  55704kN, tb=1971
122.Kc6 Rhf8 123.Qg5 Rh8 124.Kd6 Rad8+ 125.Ke6 Rde8+ 126.Kf6 Ref8+ 127.Kg7 Ra8 128.Qc5 Rhd8 129.Qc2+ Ke5 130.Qb2+ Kd6 131.Qb6+ Kd5 132.Qc7 Rh8 133.Kf6 Kd4 134.Qb7 Kc5 135.Kg7 Kd6 136.Qb6+ Kd5 137.Qb7+ Ke5 138.Qc6 Rhd8 139.Qb7 Rh8 140.Qc6 
  +-  (4.50)   Depth: 24/43   00:00:14  87082kN, tb=3663
122.Qxh8 
  +-  (4.68 ++)   Depth: 24/43   00:00:14  87129kN, tb=3664
122.Qxh8 
  +-  (5.05 ++)   Depth: 24/43   00:00:14  87149kN, tb=3664
122.Qxh8 
  +-  (6.03 ++)   Depth: 24/43   00:00:14  87169kN, tb=3664
122.Qxh8 
  +-  (8.84 ++)   Depth: 24/43   00:00:14  87218kN, tb=3664
122.Qxh8 
  +-  (17.16 ++)   Depth: 24/43   00:00:15  91822kN, tb=3669
122.Qxh8 Rxh8 123.a8Q Rxh7+ 124.Kb6+ Kd4 125.Qa1+ Kd5 126.Qf6 
  +-  (#29)   Depth: 24/43   00:00:18  115mN, tb=3670
122.Qxh8 Rxh8 123.a8Q Rxh7+ 124.Kb6+ Kd4 125.Qa1+ Kd5 126.Qf6 
  +-  (#29)   Depth: 25/43   00:00:18  120mN, tb=3724

(Eren Yavuz, Istanbul 10.05.2012)
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Interesting QPPvRR endgame

Post by zullil »

Jack Lad wrote:[d] r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 33 122
Here white must play Qxh8 to win but is your engine willing to play it? :roll:
Critter-1.4 says Mate-in-29 instantly---and then segfaults.

Should add that the engine is using Gaviota tablebases, and not just at the root.

Code: Select all

Critter v1.4 64-bit SSE4, by Richard Vida
setoption name Tablebase Usage value Everywhere
setboard r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 33 122
info string Opening book: "book.cbk" - 57853 entries [native]
info string GTB Init OK (5 piece set)
info string Using 8 thread(s), 2048 MB hash
go infinite
 2/ 2  00:00       552  552000  +5.28 Qg7 Kd5 Qc3
 2/ 2  00:00       569  569000  +5.37 Qe6+ Kd4
 3/ 4  00:00       951  951000  +5.37 Qe6+ Kd4 Qd6+ Ke4
 4/ 6  00:00      1651  825500  +5.74 Qe6+ Kd4 Qf5 Kc4
 5/ 7  00:00      2759 1379500  +5.49 Qe6+ Kd4 Qf5 Rhf8 Qc2
 6/ 8  00:00      3945 1315000  +5.53 Qe6+ Kd4 Qf5 Rhf8 Qd7+ Ke5 Qg7+ Kd5 Qc3
 7/10  00:00      5275 1758333  +5.53 Qe6+ Kd4 Qf5 Rhf8 Qd7+ Ke5 Qg7+ Kd5 Qc3
 7/12  00:00     37536 1564000 +26.44 Qxh8 Kd3 Qxa8 Kc2 h8=Q Kb1 Qh1+ Kc2 Qc8+ Kd2 a8=Q
 8/12  00:00     37857 1352035   +M29 Qxh8 Rxh8
 9/12  00:00     38748 1336137   +M29 Qxh8 Rxh8
10/12  00:00     39976 1378482   +M29 Qxh8 Rxh8
11/14  00:00     41916 1397200   +M29 Qxh8 Rxh8
12/14  00:00     45071 1453903   +M29 Qxh8 Rxh8
13/16  00:00     51241 1249780   +M29 Qxh8 Rxh8
14/18  00:00     62187 1130672   +M29 Qxh8 Rxh8
15/20  00:00     76085 1028175   +M29 Qxh8 Rxh8
16/20  00:00    107028  759063   +M29 Qxh8 Rxh8
17/20  00:00    152117  800615   +M29 Qxh8 Rxh8
18/21  00:00    229462 1002017   +M29 Qxh8 Rxh8
19/22  00:00    553766 1488618   +M29 Qxh8 Rxh8
20/22  00:00    983736 1704915   +M29 Qxh8 Rxh8
21/26  00:00   1338084 1627839   +M29 Qxh8 Rxh8
22/26  00:01   2147123 1574137   +M29 Qxh8 Rxh8
23/26  00:02   3541347 1693614   +M29 Qxh8 Rxh8
24/26  00:04   6955959 1533162   +M29 Qxh8 Rxh8
Segmentation fault
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gleperlier
Posts: 1033
Joined: Sat Feb 04, 2012 10:03 pm

Re: Interesting QPPvRR endgame

Post by gleperlier »

Hi,

Delphil 2.9a plays it instantly but does not find Mat quick.

[d]r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 0 1

Analysis by Shredder 12:

122.Qxh8 Rxh8 123.a8Q
+- (#29) Depth: 20/21 00:00:11 2221kN, tb=6405, bb=79503
(Gab, 10.05.2012)
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Interesting QPPvRR endgame

Post by kgburcham »

[d] r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 0 1

Rybka
small hardware

1.Qxh8 Ke3 2.Qxa8 Kd2 3.Qd8+ Kc1 4.a8Q Kc2 5.Qa4+
+- (27.44) Depth: 6 00:00:00 14kN
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 7 00:00:00 21kN
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 8 00:00:00 22kN, tb=1
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 9 00:00:00 22kN, tb=1
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 10 00:00:00 23kN, tb=1
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 11 00:00:00 26kN, tb=1
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 12 00:00:00 32kN, tb=2
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 13 00:00:00 38kN, tb=3
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 14 00:00:00 46kN, tb=4
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 15 00:00:00 72kN, tb=5
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 16 00:00:00 81kN, tb=8
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 17 00:00:00 105kN, tb=14
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 18 00:00:00 224kN, tb=17
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 19 00:00:00 247kN, tb=27
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 20 00:00:00 354kN, tb=67
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 21 00:00:00 541kN, tb=181
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 22 00:00:00 900kN, tb=387
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 23 00:00:01 1365kN, tb=791
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 24 00:00:01 2152kN, tb=1466
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 25 00:00:02 3303kN, tb=2641
1.Qxh8 Rxh8 2.a8Q Rxh7+ 3.Kb6+ Kf4 4.Qc6 Rh5 5.Qc4+ Ke3
+- (#30) Depth: 26 00:00:03 4451kN, tb=4091
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Jack Lad
Posts: 8557
Joined: Wed Mar 08, 2006 10:01 pm
Location: UK

Re: Interesting QPPvRR endgame

Post by Jack Lad »

Try again but this time with a black pawn on e3; white still has to take the rook on h8 to win.
[d] r6r/PK5P/5Q2/8/4k3/4p3/8/8 w - - 33 122
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Interesting QPPvRR endgame

Post by kgburcham »

not enough
try again

[d] r6r/PK5P/5Q2/8/4k3/4p3/8/8 w - - 0 1

Rybka

1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#80 ++) Depth: 9 00:00:00 38kN, tb=3
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#80 ++) Depth: 9 00:00:00 38kN, tb=3
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#80 ++) Depth: 9 00:00:00 38kN, tb=3
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 10 00:00:00 38kN, tb=4
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 11 00:00:00 38kN, tb=4
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 12 00:00:00 54kN, tb=4
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 13 00:00:00 103kN, tb=7
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 14 00:00:00 125kN, tb=10
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 15 00:00:00 167kN, tb=18
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 16 00:00:00 213kN, tb=26
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 17 00:00:00 258kN, tb=34
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 18 00:00:00 299kN, tb=53
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 19 00:00:00 355kN, tb=92
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 20 00:00:00 481kN, tb=106
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 21 00:00:00 602kN, tb=129
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 22 00:00:00 745kN, tb=156
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 23 00:00:00 927kN, tb=204
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 24 00:00:01 1217kN, tb=267
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 25 00:00:01 1630kN, tb=374
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qa2 Rh6+ 5.Kc5 Kf3 6.Qd5+ Kf2
+- (#45) Depth: 26 00:00:01 2388kN, tb=608
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qf8+ Ke4 5.Qe8+ Kf3 6.Qf8+ Ke2 7.Kb5
+- (#45) Depth: 27 00:00:03 3723kN, tb=994
1.Qxh8 Rxh8 2.a8Q[] Rxh7+ 3.Kb6+ Kf4 4.Qf8+ Ke4 5.Qe8+ Kf3 6.Qf8+ Ke2 7.Kb5
+- (#45) Depth: 28 00:00:05 7378kN, tb=1753
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Jack Lad
Posts: 8557
Joined: Wed Mar 08, 2006 10:01 pm
Location: UK

Re: Interesting QPPvRR endgame

Post by Jack Lad »

Okay add another black pawn to a5.
[d] r6r/PK5P/5Q2/p7/4k3/4p3/8/8 w - - 33 122
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Uri Blass
Posts: 11219
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Interesting QPPvRR endgame

Post by Uri Blass »

Jack Lad wrote:Okay add another black pawn to a5.
[d] r6r/PK5P/5Q2/p7/4k3/4p3/8/8 w - - 33 122
Not enough

Even a relatively weak engine like my relatively old engine
movei can solve it without tablebases like previous positions(houdini1.5 may have problems but I did not test it with tablebases to check it and I suspect that tablebases can help it because it is going to go to KQ vs KRP winning endgame).


New game
[d]r6r/PK5P/5Q2/p7/4k3/4p3/8/8 w - - 0 1

Analysis by Movei00_8_438:

1.Qf6-c6+
² (0.57) Depth: 1 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5
² (0.57) Depth: 2 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5
² (0.57) Depth: 2 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5
² (0.57) Depth: 3 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5
² (0.57) Depth: 3 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-h6+ Kf4-e4 3.Qh6-a6 Ke4-f3 4.Qa6xa5
² (0.67) Depth: 4 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-h6+ Kf4-e4 3.Qh6-a6 Ke4-f3 4.Qa6xa5
² (0.67) Depth: 4 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5 e3-e2 4.Qa5-e5
± (0.83) Depth: 5 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-a4+ Kf4-f3 3.Qa4xa5 e3-e2 4.Qa5-e5
± (0.83) Depth: 5 00:00:00
1.Qf6-c6+ Ke4-f4 2.Qc6-c7+ Kf4-f3 3.Qc7xa5
± (0.77) Depth: 6 00:00:00 99kN
1.Qf6-c6+ Ke4-f4 2.Qc6-c7+ Kf4-f3 3.Qc7xa5
± (0.77) Depth: 6 00:00:00 138kN
1.Qf6-c6+ Ke4-f4 2.Qc6-c7+ Kf4-f3 3.Qc7xa5 e3-e2 4.Qa5-c3+ Kf3-f2 5.Qc3-d4+ Kf2-f3
² (0.70) Depth: 7 00:00:00 266kN
1.Qf6xh8
± (0.71) Depth: 7 00:00:01 464kN
1.Qf6xh8
± (1.00) Depth: 7 00:00:01 464kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1
+- (1.92) Depth: 7 00:00:01 466kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1
+- (1.92) Depth: 7 00:00:01 467kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8xa5 Rh7-h6+ 5.Kb6-c7 Rh6-h1
+- (1.97) Depth: 8 00:00:01 475kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8xa5 Rh7-h6+ 5.Kb6-c7 Rh6-h1
+- (1.97) Depth: 8 00:00:01 533kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8xa5 Rh7-h8+ 5.Kc8-d7 Kf4-e4
+- (2.08) Depth: 9 00:00:01 566kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8xa5 Rh7-h8+ 5.Kc8-d7 Kf4-e4
+- (2.08) Depth: 9 00:00:01 742kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-d4 4.Qa8xa5 Rh7-h8+ 5.Kc8-c7 Rh8-h7+ 6.Kc7-b6 Kd4-e4 7.Qa5-a2
+- (2.06) Depth: 10 00:00:02 827kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-d4 4.Qa8xa5 Rh7-h8+ 5.Kc8-c7 Rh8-h7+ 6.Kc7-b6 Kd4-e4 7.Qa5-a2
+- (2.06) Depth: 10 00:00:03 1375kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-h2 6.Qf1-c4+ Ke4-f3 7.Qc4-f7+ Kf3-g3 8.Qf7-c7+ Kg3-h3
+- (2.00) Depth: 11 00:00:03 1850kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-h2 6.Qf1-c4+ Ke4-f3 7.Qc4-f7+ Kf3-g3 8.Qf7-c7+ Kg3-h3
+- (2.00) Depth: 11 00:00:06 3012kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-a6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-e7 6.Ka6xa5 Ke4-d4
+- (2.11) Depth: 12 00:00:08 4284kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-a6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-e7 6.Ka6xa5 Ke4-d4
+- (2.11) Depth: 12 00:00:11 5627kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-a6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-h8 6.Ka6xa5 Rh8-b8 7.Qf1-e2 Ke4-d4 8.Ka5-a4
+- (2.18) Depth: 13 00:00:13 6590kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-a6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-f1 Rh7-h8 6.Ka6xa5 Rh8-b8 7.Qf1-e2 Ke4-d4 8.Ka5-a4
+- (2.18) Depth: 13 00:00:18 8872kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-a6+ Ke4-f4 4.Qa8-f8+ Kf4-e4 5.Qf8-e8+ Ke4-f3 6.Qe8-c6+ Kf3-f2 7.Qc6-f6+ Kf2-e1 8.Ka6xa5 Rh7-b7 9.Qf6-f3 Rb7-b3 10.Ka5-a4
+- (2.14) Depth: 14 00:00:23 12014kN

(, 11.05.2012)



New game
[d]r6r/PK5P/5Q2/8/4k3/4p3/8/8 w - - 0 1

Analysis by Movei00_8_438:

1.Qf6-f1
± (0.96) Depth: 1 00:00:00
1.Qf6-f1 Ra8-c8
± (0.97) Depth: 2 00:00:00
1.Qf6-e6+
± (0.98) Depth: 2 00:00:00
1.Qf6-e6+ Ke4-d4 2.Qe6-g4+ Kd4-d3 3.Qg4-d1+ Kd3-e4
± (1.05) Depth: 2 00:00:00
1.Qf6-g6+
± (1.06) Depth: 2 00:00:00
1.Qf6-g6+ Ke4-f4 2.Qg6-d3
± (1.10) Depth: 2 00:00:00
1.Qf6-g6+ Ke4-f4 2.Qg6-d3
± (1.10) Depth: 2 00:00:00
1.Qf6-g6+ Ke4-d4 2.Qg6-c2 Rh8-e8 3.Qc2-d1+ Kd4-c4
± (1.20) Depth: 3 00:00:00
1.Qf6-g6+ Ke4-d4 2.Qg6-c2 Rh8-e8 3.Qc2-d1+ Kd4-c4
± (1.20) Depth: 3 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-h5+ Kf3-f4 3.Qh5-f7+
± (1.31) Depth: 4 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-h5+ Kf3-f4 3.Qh5-f7+
± (1.31) Depth: 4 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3 4.Qc4-f1+ Kf3-e4 5.Qf1-e2
± (1.20) Depth: 5 00:00:00
1.Qf6-c6+
± (1.21) Depth: 5 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3 4.Qc4-f1+ Kf3-e4 5.Qf1-e2
± (1.20) Depth: 5 00:00:00
1.Qf6-f1
± (1.21) Depth: 5 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3 4.Qc4-f1+ Kf3-e4 5.Qf1-e2
± (1.20) Depth: 5 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3 4.Qc4-f1+ Kf3-e4 5.Qf1-e2
± (1.20) Depth: 5 00:00:00
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3
± (1.20) Depth: 6 00:00:00 149kN
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-e4 3.Qf7-c4+ Ke4-f3
± (1.20) Depth: 6 00:00:00 251kN
1.Qf6-g6+ Ke4-f3 2.Qg6-f7+ Kf3-g3 3.Qf7-c7+ Kg3-f3
± (1.20) Depth: 7 00:00:01 426kN
1.Qf6xh8
± (1.21) Depth: 7 00:00:01 614kN
1.Qf6xh8
+- (1.50) Depth: 7 00:00:01 614kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-f1+ Kf4-g4
+- (2.36) Depth: 7 00:00:01 618kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-f1+ Kf4-g4
+- (2.36) Depth: 7 00:00:01 618kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8-g2 Rh7-a7 5.Kc8-d8
+- (2.58) Depth: 8 00:00:01 628kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8-g2 Rh7-a7 5.Kc8-d8
+- (2.58) Depth: 8 00:00:01 670kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-e2 Re7-h7
+- (2.58) Depth: 9 00:00:01 689kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c8+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-e2 Re7-h7
+- (2.58) Depth: 9 00:00:02 843kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-f1+ Kf4-g4 6.Kb6-c5
+- (2.78) Depth: 10 00:00:03 951kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-g2 Rh7-e7 5.Qg2-f1+ Kf4-g4 6.Kb6-c5
+- (2.78) Depth: 10 00:00:03 1286kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-g2 Rh7-h8 5.Qg2-f1+ Kf4-e4 6.Qf1-c4+ Ke4-f3 7.Qc4-f7+ Kf3-e2 8.Kb6-c5
+- (2.86) Depth: 11 00:00:03 1560kN

(, 11.05.2012)

New game
[d]r6r/PK5P/5Q2/8/4k3/8/8/8 w - - 0 1

Analysis by Movei00_8_438:

1.Qf6xh8
+- (4.78) Depth: 1 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 2 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 2 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 3 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 3 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 4 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6
+- (4.78) Depth: 4 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-f5
+- (4.77) Depth: 5 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-f5
+- (4.77) Depth: 5 00:00:00
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-f5 5.Qa8-f8+ Kf5-g5
+- (4.99) Depth: 6 00:00:00 37kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-f5 5.Qa8-f8+ Kf5-g5
+- (4.99) Depth: 6 00:00:01 82kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-e3 5.Qa8-b8 Rh6-h5+ 6.Kc5-c4
+- (5.19) Depth: 7 00:00:01 94kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h6+ 4.Kc6-c5+ Ke4-e3 5.Qa8-b8 Rh6-h5+ 6.Kc5-c4
+- (5.19) Depth: 7 00:00:01 200kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e3 5.Kb6-c6 Rh7-h2
+- (5.13) Depth: 8 00:00:01 288kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-b6+ Ke4-f4 4.Qa8-f8+ Kf4-e3 5.Kb6-c6 Rh7-h2
+- (5.13) Depth: 8 00:00:02 596kN
1.Qf6xh8 Ra8xh8 2.a7-a8Q Rh8xh7+ 3.Kb7-c6 Rh7-h2 4.Kc6-c5+ Ke4-e3 5.Kc5-d5
+- (5.15) Depth: 9 00:00:02 722kN

(, 11.05.2012)
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