Queen sac from Sage 3.51d

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Graham Banks
Posts: 41423
Joined: Sun Feb 26, 2006 10:52 am
Location: Auckland, NZ

Queen sac from Sage 3.51d

Post by Graham Banks »

It's not too often these days that you see a good king hunt involving a queen sac along the way!

[Event "40 Moves in 62 min"]
[Site "Little Thought Big Heart"]
[Date "2008.04.13"]
[Round "1.1"]
[White "NanoSzachy 3.1"]
[Black "Sage 3.51d"]
[Result "0-1"]

1. c4 {book 0s} e5 {book 0s} 2. Nc3 {book 0s} Nc6 {book 0s}
3. Nf3 {book 0s} Nf6 {book 0s} 4. g3 {book 0s} g6 {book 0s}
5. Bg2 {book 0s} Bg7 {book 0s} 6. d4 {book 0s} exd4 {book
0s} 7. Nxd4 {book 0s} O-O {book 0s} 8. O-O {book 0s} Re8
{book 0s} 9. e3 {+0.18/12 5:15m} a5 {+0.11/13 1:56m (a6)}
10. Qb3 {+0.30/12 4:09m (Bd2)} Ne5 {+0.18/13 1:56m (Ng4)}
11. c5 {+0.55/11 2:49m (Na4)} Bf8 {0.00/14 1:56m} 12. Na4
{+0.41/12 2:15m} d5 {+0.17/15 3:23m} 13. cxd6 {+0.43/11
57s} Bxd6 {+0.08/14 1:53m (Qxd6)} 14. Rd1 {+0.45/11 2:44m
(f4)} Bd7 {-0.18/13 1:53m} 15. Nc3 {+0.47/11 4:28m} Rb8
{-0.14/13 1:53m} 16. f4 {+0.56/11 3:54m} Neg4 {-0.14/13
1:53m} 17. Rd3 {+0.04/12 3:31m} Bc5 {-0.13/13 1:53m}
18. Qc4 {+0.17/11 2:08m} Qe7 {-0.52/13 1:53m} 19. Nd5
{-0.29/12 2:21m} Nxd5 {-0.84/13 1:53m} 20. Bxd5 {-0.49/13
2:00m} Bxd4 {-0.89/13 1:53m} 21. Qxd4 {-0.49/11 28s (Rxd4)}
Bf5 {-0.96/14 1:53m} 22. Rc3 {-0.46/11 39s} Red8 {-1.46/14
1:53m (Rbd8)} 23. Qc4 {-0.96/11 1:45m} b5 {-2.87/15 1:53m}
24. Qc5 {-2.51/12 2:36m} Qe4 {-5.30/14 1:53m} 25. Bxe4
{-2.51/12 3:43m} Rd1+ {-6.96/14 1:53m} 26. Kg2 {+4.84/4 0s}
Bxe4+ {-M-1372/15 1:53m} 27. Kh3 {+5.07/4 0s} Nf2+
{-M-1373/15 1:53m (Bf5)} 28. Kh4 {+2.51/4 0s} Rh1
{-M-1374/15 1:53m (Rd5)} 29. Kg5 {-3.84/10 41s} h6+
{-M-1375/14 1:53m} 30. Kxh6 {-99.84/12 1:42m} f6
{-M-1376/13 1:53m} 31. Qd5+ {-99.86/12 2:12m} Kh8
{-M-1377/19 1:53m} 0-1

Position after White's 24th move
[D]1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b
gbanksnz at gmail.com
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User avatar
George Tsavdaris
Posts: 1627
Joined: Thu Mar 09, 2006 12:35 pm

Re: Queen sac from Sage 3.51d

Post by George Tsavdaris »

Graham Banks wrote: 1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b
Cool!
Nice game, thanks..... 8-)
After his son's birth they've asked him:
"Is it a boy or girl?"
YES! He replied.....
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Mate in 14?

Post by kgburcham »

[D] 1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b - -

Zappa Mexico II

18.00 0:00 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.e4 Re8+ (18)
19/48 0:07 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.e4 Re8+ (18.022.912) 2270
19/48 0:10 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.e4 Re8+ (25.648.185) 2341

Zappa Mexico II
Hash cleared

16/51 1:18 -12.04 24...Qe4 25.Rd3 Qxd3 26.Qd4 Rxd5 27.Qxd3 Rxd3 28.Kg2 Nxe3+ 29.Bxe3 Rxe3 30.Kg1 Re2 31.b3 Be4 32.Rc1 (182.680.480) 2337
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

This is better

Post by kgburcham »

[D] 1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b - -

Zappa Mexico II

16/51 0:36 -3.18 24...Qd7 25.Bb3 a4 26.Bc2 b4 27.Rc4 Bxc2 28.Rd4 Qe6 29.Rxd8+ Rxd8 30.Qxc2 Nxe3 31.Bxe3 Qxe3+ 32.Qf2 Qxf2+ 33.Kxf2 Rd2+ 34.Ke3 Rxb2 35.h3 Rg2 36.g4 f5 37.gxf5 gxf5 (83.350.788) 2296
16/51 1:11 -11.99 24...Qe4 25.Rd3 Qxd3 26.Qd4 Rxd5 27.Qxd3 Rxd3 28.Kf1 Re8 29.a4 b4 30.Kg1 Rd1+ 31.Kg2 Rxe3 32.Bxe3 Nxe3+ (167.958.646) 2334
17/53 2:36 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.Ra2 Re8+ (385.545.438) 2458
18/53 2:41 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.Ra2 Re8+ (395.362.018) 2453
19/53 2:56 -M14 24...Qe4 25.Rd3 Qxd3 26.Bf3 Qd1+ 27.Bxd1 Rxd1+ 28.Kg2 Be4+ 29.Kh3 Nf2+ 30.Kh4 Rh1 31.Kg5 h6+ 32.Kxh6 Rxh2+ 33.Kg5 Rh5+ 34.Kf6 Ng4+ 35.Ke7 Rxc5 36.a3 Bc6 37.Ra2 Re8+ (427.262.935) 2420
best move: Qe7-e4 time: 3:23.219 min n/s: 2.657.647 nodes: 482.249.501
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User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Queen sac from Sage 3.51d

Post by michiguel »

Graham Banks wrote:It's not too often these days that you see a good king hunt involving a queen sac along the way!

[Event "40 Moves in 62 min"]
[Site "Little Thought Big Heart"]
[Date "2008.04.13"]
[Round "1.1"]
[White "NanoSzachy 3.1"]
[Black "Sage 3.51d"]
[Result "0-1"]

1. c4 {book 0s} e5 {book 0s} 2. Nc3 {book 0s} Nc6 {book 0s}
3. Nf3 {book 0s} Nf6 {book 0s} 4. g3 {book 0s} g6 {book 0s}
5. Bg2 {book 0s} Bg7 {book 0s} 6. d4 {book 0s} exd4 {book
0s} 7. Nxd4 {book 0s} O-O {book 0s} 8. O-O {book 0s} Re8
{book 0s} 9. e3 {+0.18/12 5:15m} a5 {+0.11/13 1:56m (a6)}
10. Qb3 {+0.30/12 4:09m (Bd2)} Ne5 {+0.18/13 1:56m (Ng4)}
11. c5 {+0.55/11 2:49m (Na4)} Bf8 {0.00/14 1:56m} 12. Na4
{+0.41/12 2:15m} d5 {+0.17/15 3:23m} 13. cxd6 {+0.43/11
57s} Bxd6 {+0.08/14 1:53m (Qxd6)} 14. Rd1 {+0.45/11 2:44m
(f4)} Bd7 {-0.18/13 1:53m} 15. Nc3 {+0.47/11 4:28m} Rb8
{-0.14/13 1:53m} 16. f4 {+0.56/11 3:54m} Neg4 {-0.14/13
1:53m} 17. Rd3 {+0.04/12 3:31m} Bc5 {-0.13/13 1:53m}
18. Qc4 {+0.17/11 2:08m} Qe7 {-0.52/13 1:53m} 19. Nd5
{-0.29/12 2:21m} Nxd5 {-0.84/13 1:53m} 20. Bxd5 {-0.49/13
2:00m} Bxd4 {-0.89/13 1:53m} 21. Qxd4 {-0.49/11 28s (Rxd4)}
Bf5 {-0.96/14 1:53m} 22. Rc3 {-0.46/11 39s} Red8 {-1.46/14
1:53m (Rbd8)} 23. Qc4 {-0.96/11 1:45m} b5 {-2.87/15 1:53m}
24. Qc5 {-2.51/12 2:36m} Qe4 {-5.30/14 1:53m} 25. Bxe4
{-2.51/12 3:43m} Rd1+ {-6.96/14 1:53m} 26. Kg2 {+4.84/4 0s}
Bxe4+ {-M-1372/15 1:53m} 27. Kh3 {+5.07/4 0s} Nf2+
{-M-1373/15 1:53m (Bf5)} 28. Kh4 {+2.51/4 0s} Rh1
{-M-1374/15 1:53m (Rd5)} 29. Kg5 {-3.84/10 41s} h6+
{-M-1375/14 1:53m} 30. Kxh6 {-99.84/12 1:42m} f6
{-M-1376/13 1:53m} 31. Qd5+ {-99.86/12 2:12m} Kh8
{-M-1377/19 1:53m} 0-1

Position after White's 24th move
[D]1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b
That is a beautiful move!

I am so happy that my engine Gaviota sees Qe4 relatively quickly (6.3 seconds, ply 7) on an old laptop (AMD 1.4 Ghz) compiled with no optimizations (mingw). Hashtables = 8 MB.

Miguel

Code: Select all

xboard/winboard mode
Position initialized.
setboard 1r1r2k1/2p1qp1p/6p1/ppQB1b2/5Pn1/2R1P1P1/PP5P/R1B3K1 b - -
d
+-----------------+
| . r . r . . k . | [Black]
| . . p . q p . p |
| . . . . . . p . |
| p p Q B . b . . |    Castling:
| . . . . . P n . |    ep: -
| . . R . P . P . |
| P P . . . . . P |
| R . B . . . K . |
+-----------------+

analyze
        10   1       0.0    -0.22  Qe7xc5   Rc3xc5
        91   1       0.0    -0.19  Rd8-d7   Qc5xe7   Rd7xe7
       128   1       0.0    -0.14  Qe7-d6   Qc5xd6   Rd8xd6
       165   1       0.0    -0.05  Qe7-d7
       176   1:      0.0    -0.05  Qe7-d7
       280   2       0.1    -0.43  Qe7-d7   e3-e4
       369   2       0.1    -0.14  Qe7xc5   Rc3xc5   h7-h5
       579   2:      0.1    -0.14  Qe7xc5   Rc3xc5   h7-h5
      1021   3       0.1    -0.25  Qe7xc5   Rc3xc5   Ng4-f6   Bd5-c6
      4352   3       0.3    -0.18  Rd8-d6   Bd5-f3   Rd6-d7   Qc5xe7
                                   Rd7xe7
      5419   3:      0.3    -0.18  Rd8-d6   Bd5-f3   Rd6-d7   Qc5xe7
                                   Rd7xe7
      8513   4       0.3    -0.45  Rd8-d6   Bc1-d2   h7-h5    Rc3-a3
     10173   4       0.4    -0.29  Qe7xc5   Rc3xc5   Ng4-f6   Bd5-f3
                                   Rd8-d7
     13989   4       0.4    -0.21  Qe7-e8   Rc3-a3   Ng4-f6   Bd5-c6
     17533   4:      0.4    -0.21  Qe7-e8   Rc3-a3   Ng4-f6   Bd5-c6
     29021   5       0.6    -0.11  Qe7-e8   Bd5-f3   Rd8-d7   Qc5-a7
                                   a5-a4    Rc3xc7   Rd7xc7   Qa7xc7
                                   Ng4xe3
     43886   5       0.7    -0.08  Qe7-d7   e3-e4    Bf5xe4   Bd5xe4
                                   Qd7-d1   Kg1-g2   Qd1-e2   Kg2-h3
                                   Qe2xe4   Kh3xg4
     49123   5:      0.8    -0.08  Qe7-d7   e3-e4    Bf5xe4   Bd5xe4
                                   Qd7-d1   Kg1-g2   Qd1-e2   Kg2-h3
                                   Qe2xe4   Kh3xg4
     73278   6       1.0      :-)  Qe7-d7
     78343   6       1.1    -0.34  Qe7-d7   Bd5-f3   b5-b4    Rc3-b3
                                   Rb8-b5   Qc5-c4
    124151   6       1.5    -0.30  Qe7xc5   Rc3xc5   c7-c6    Bd5-f3
                                   Rd8-d3   b2-b3    Bf5-d7
    183699   6       2.1    -0.21  Rd8-d7   Qc5xe7   Rd7xe7   Bd5-f3
                                   b5-b4    Rc3-c5   Ng4xe3   Rc5xa5
    189689   6:      2.2    -0.21  Rd8-d7   Qc5xe7   Rd7xe7   Bd5-f3
                                   b5-b4    Rc3-c5   Ng4xe3   Rc5xa5
    317634   7       3.4    -0.25  Rd8-d7   Bd5-f3   Qe7-e6   Qc5-a7
                                   Qe6-b6   Qa7xb6   c7xb6
    413728   7       4.3      :-)  Qe7-d7
    471202   7       4.8    +0.72  Qe7-d7   h2-h3    b5-b4    Rc3-c4
                                   Rb8-b5   Bd5xf7   Kg8xf7   Qc5xc7
    624390   7       6.3      :-)  Qe7-e4
    684121   7       6.8    +2.70  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   Rh1xh2   Kh4-g5
                                   Rb8-e8   Qc7xf7   Kg8xf7
    723387   7:      7.1    +2.70  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   Rh1xh2   Kh4-g5
                                   Rb8-e8   Qc7xf7   Kg8xf7
    855574   8       8.3    +2.39  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   Rh1xh2   Kh4-g5
                                   Rb8-e8   Qc7xf7   Kg8xf7   Bc1-d2
    948172   8:      9.0    +2.39  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   Rh1xh2   Kh4-g5
                                   Rb8-e8   Qc7xf7   Kg8xf7   Bc1-d2
   1360990   9      12.9      :-)  Qe7-e4
   1947522   9      18.7      :-)  Qe7-e4
   2144549   9      20.2    +3.68  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   h7-h6    Qc7xf7
                                   Kg8xf7   Rc3-c7   Kf7-e6   f4-f5
                                   g6xf5    Kh4-h5   Rh1xh2   Kh5-g6
   2303404   9:     21.6    +3.68  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Qc5xc7   h7-h6    Qc7xf7
                                   Kg8xf7   Rc3-c7   Kf7-e6   f4-f5
                                   g6xf5    Kh4-h5   Rh1xh2   Kh5-g6
   2578048  10      24.0      :-(  Qe7-e4
   3332898  10      31.1      :-(
   4934204  10      46.2    +3.83  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Kh4-g5   Rb8-e8   Qc5-f8
                                   Re8xf8   Kg5-f6   Nf2-g4   Kf6-g5
                                   f7-f5    Rc3xc7   Rh1xh2
   4944387  10:     46.3    +3.83  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Kh4-g5   Rb8-e8   Qc5-f8
                                   Re8xf8   Kg5-f6   Nf2-g4   Kf6-g5
                                   f7-f5    Rc3xc7   Rh1xh2
   8598831  11      81.4    +3.79  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Kh4-g5   Rb8-e8   h2-h4
                                   Rh1-h3   Kg5-h6   Nf2-g4   Kh6-g5
                                   h7-h5    Qc5-f8   Kg8xf8   Rc3xc7
                                   Rh3xg3
  10766339  11:    102.7    +3.79  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Kh4-g5   Rb8-e8   h2-h4
                                   Rh1-h3   Kg5-h6   Nf2-g4   Kh6-g5
                                   h7-h5    Qc5-f8   Kg8xf8   Rc3xc7
                                   Rh3xg3
  22783224  12     220.6      :-)  Qe7-e4
  28570525  12     273.7    +3.91  Qe7-e4   Bd5xe4   Rd8-d1   Kg1-g2
                                   Bf5xe4   Kg2-h3   Ng4-f2   Kh3-h4
                                   Rd1-h1   Kh4-g5   Rb8-e8   Qc5-e7
                                   Re8xe7   h2-h4    f7-f5    a2-a4
                                   Rh1-h3   a4xb5    Rh3xg3   Kg5-f6
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rightrook
Posts: 1452
Joined: Wed Mar 08, 2006 8:45 pm

Re: Queen sac from Sage 3.51d

Post by rightrook »

Great test move..!!

hiarcs 11.2 takes 70 seconds to find ...Qe4 on my machine..

regards

Robert
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