About a Mate in 13...

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rightrook
Posts: 1452
Joined: Wed Mar 08, 2006 7:45 pm

About a Mate in 13...

Post by rightrook » Tue Nov 22, 2011 6:30 pm

[D]8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Any engines ann. a mate in 13 at move one....?

1. Qb1 wins...

:lol:
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bob
Posts: 20916
Joined: Mon Feb 27, 2006 6:30 pm
Location: Birmingham, AL

Re: About a Mate in 13...

Post by bob » Tue Nov 22, 2011 7:03 pm

rightrook wrote:[D]8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Any engines ann. a mate in 13 at move one....?

1. Qb1 wins...

:lol:
Crafty finds a mate in 16 quickly. I let it run for 2+ minutes and it could not improve that...
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Kurt
Posts: 45
Joined: Mon Aug 01, 2011 1:18 pm
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Re: About a Mate in 13...

Post by Kurt » Tue Nov 22, 2011 7:59 pm

rightrook wrote:[D]8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Any engines ann. a mate in 13 at move one....?

1. Qb1 wins...

:lol:
  • 8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - -

    Engine: Houdini 1.5 w32 (128 MB)
    von Robert Houdart

    21/50 0:01 +11.68 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dg2
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxg2 e4
    7.Df2 h3 8.De3+ Kc2 9.Dxe4+ Kxd2
    10.Df4+ Ke2 11.Dh2+ Ke3 12.Dxh3+ Kd4
    13.Df3 Kc4 14.Dxf6 (9.863.506) 6642

    22/59 0:01 +12.16++ 1.Db1 (12.139.737) 6633

    22/59 0:02 +13.13++ 1.Db1 (14.688.570) 6697

    22/59 0:03 +15.91++ 1.Db1 (23.119.921) 6932

    22/59 0:06 +24.13++ 1.Db1 (44.457.804) 7388

    22/61 0:12 +M32 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.De1+ Kh3 8.De4 Kg3 9.Dg6+ Kf3
    10.Dxf6+ Kg3 11.Dg5+ Kf3 12.Dxh4 e4
    13.Dg5 e3 14.dxe3 (109.223.478) 8490

    23/61 0:14 +M31 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.De1+ Kh3 8.De4 Kg3 9.Dg6+ Kf3
    10.Dxf6+ Kg3 11.Dg5+ Kf3 12.Dxh4 e4
    13.Dg5 e3 14.dxe3 (123.760.505) 8477

    24/61 0:15 +M31 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.De1+ Kh3 8.De4 Kg3 9.Dg6+ Kf3
    10.Dxf6+ Kg3 11.Dg5+ Kf3 12.Dxh4 e4
    13.Dg5 e3 14.Dxe3+ (133.597.343) 8421

    25/61 0:18 +M31 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.De1+ Kh3 8.Ke6 e4 9.Kxf6 Kg2
    10.Dxh4 e3 11.De4+ Kg3 12.Dxe3+ Kh2
    13.d4 Kg2 14.d5 (151.447.267) 8372

    26/61 0:22 +M31 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.De1+ Kh3 8.Ke6 e4 9.Kxf6 Kg2
    10.Dxh4 e3 11.De4+ Kg3 12.Dxe3+ Kh2
    13.d4 Kg2 14.Ke5 (190.765.453) 8366

    27/61 0:58 +M26 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kf4 6.Dxh1 Kg3
    7.Ke6 Kg4 8.Kxf6 e4 9.Dxe4+ Kg3
    10.De3+ Kg4 11.Df2 h3 12.Ke5 h2
    13.Dxh2 Kf3 14.Dg1 (523.376.443) 8950
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Kurt
Posts: 45
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Re: About a Mate in 13...

Post by Kurt » Tue Nov 22, 2011 8:10 pm

  • 8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - -

    Engine: Houdini 1.5 w32 (128 MB)
    von Robert Houdart

    28/61 1:54 +M18 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dh1
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxh1 e4
    7.Dxh4 e3 8.dxe3 f5 9.Df4 Ke2
    10.Dxf5 Ke1 11.e4 Kd2 12.e5 Kc3
    13.e6 Kb2 14.e7 (1.016.293.232) 8863

    29/61 3:37 +M17 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dg2
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxg2 e4
    7.Df2 h3 8.De3+ Kc2 9.Dxh3 Kxd2
    10.Kd5 f5 11.Dxf5 e3 12.Kd4 e2
    13.Dd3+ Ke1 14.Ke3 (1.955.737.117) 8991

    30/61 4:39 +M17 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dg2
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxg2 e4
    7.Df2 h3 8.De3+ Kc2 9.Dxh3 Kxd2
    10.Kd5 f5 11.Dxf5 e3 12.Kd4 e2
    13.Dd3+ Ke1 14.Ke3 (2.535.619.002) 9077

    31/61 6:21 +M17 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dg2
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxg2 e4
    7.Df2 h3 8.De3+ Kc2 9.Dxh3 Kxd2
    10.Kd5 f5 11.Dxf5 e3 12.Kd4 e2
    13.Dd3+ Ke1 14.Ke3 (3.513.483.019) 9198

    32/61 8:34 +M17 1.Db1 Kd4 2.Db3 Dxe4+ 3.Kd6 Dg2
    4.Dc3+ Ke4 5.Dc6+ Kd3 6.Dxg2 e4
    7.Df2 h3 8.De3+ Kc2 9.Dxh3 Kxd2
    10.Kd5 f5 11.Dxf5 e3 12.Kd4 e2
    13.Dd3+ Ke1 14.Ke3 (4.786.701.303) 9310
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Ramiras

Re: About a Mate in 13...

Post by Ramiras » Tue Nov 22, 2011 8:10 pm

Deep Rybka4 SSE42 finds mate in 13 pretty quickly :shock:
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Ajedrecista
Posts: 1455
Joined: Wed Jul 13, 2011 7:04 pm
Location: Madrid, Spain.
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Re: About a Mate in 13...

Post by Ajedrecista » Tue Nov 22, 2011 8:36 pm

Hello:

Analysis by Deep Rybka 4.1 w32 (2 cores) under Intel Pentium D930 (3 GHz) with 128 MB of hash:

[d]8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Code: Select all

Deep Rybka 4.1 w32:
   1	00:00	         145	923	-0,82	Qh1f3 Kc4b4 Qf3c3+
   2+	00:00	         161	1.025	-0,70	Qh1f3 Kc4b4 Qf3c3+
   2+	00:00	         163	1.038	-0,55	Qh1f3 Kc4b4 Qf3c3+
   2	00:00	         175	1.114	-0,44	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6
   3	00:00	         533	3.080	-0,74	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6 h4h3 Qc4c3+
   4+	00:00	         549	3.173	-0,62	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6 h4h3 Qc4c3+
   4	00:00	         616	3.560	-0,60	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c4+
   5+	00:00	         810	4.682	-0,48	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+
   5+	00:00	         818	4.728	-0,33	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+
   5	00:00	         892	4.744	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   6	00:00	       1.167	6.207	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   7	00:00	       1.938	9.500	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   8	00:00	       3.677	16.713	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   9	00:00	       7.220	27.041	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  10	00:00	      16.663	42.507	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  11	00:00	      23.958	47.820	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  12	00:00	      36.283	55.225	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  12+	00:01	      58.488	61.308	+0,12	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a6 Qb3a4+ Ka6b7 Qa4xh4 Qa8f8+ Kd6d5
  12+	00:01	      58.721	60.537	+0,27	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6
  12+	00:01	      59.282	61.115	+0,67	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+
  12+	00:01	      59.822	59.762	+6,27	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+
  12	00:05	     443.212	79.215	+11,04	Qh1b1 Kc4d4 Qb1b3 Kd4xe4 Qb3b1+ Ke4f3 Qb1xh7 Kf3g3 Qh7g6+ Kg3h2 Kc6d6 Kh2h3 Kd6e6 e5e4 Qg6xf6 Kh3g3 Qf6g5+ Kg3f3 Qg5e3+ Kf3g4 Qe3xe4+ Kg4g3 Ke6e5 h4h3 Qe4f4+ Kg3g2 Qf4g4+ Kg2h2 Ke5d6
  13	00:06	     467.636	78.134	+11,04	Qh1b1 Kc4d4 Qb1b3 Kd4xe4 Qb3b1+ Ke4f3 Qb1xh7 Kf3g3 Qh7g6+ Kg3h2 Kc6d6 Kh2h3 Kd6e6 e5e4 Qg6xf6 Kh3g3 Qf6g5+ Kg3f3 Qg5e3+ Kf3g4 Qe3xe4+ Kg4g3 Ke6e5 h4h3 Qe4f4+ Kg3g2 Qf4g4+ Kg2h2 Ke5d6
  14	00:23	   2.175.028	91.576	+M18	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Qh1e4 h4h3 Qe4g6+ Kg3f3 Qg6xf6+ Kf3e4 Qf6xe5+ Ke4f3 Qe5f5+ Kf3g3 Qf5e5+ Kg3g2 Qe5g7+ Kg2f3
  15	01:05	   4.992.213	76.234	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 h4h3 Qh1xe4 h3h2 Kf6e6 Kg3f2 Qe4f5+ Kf2g3 Qf5e5+ Kg3g2 d2d4 h2h1Q
  16	01:10	   5.515.543	78.285	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  17	01:14	   5.954.952	80.403	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  18	01:30	   7.766.648	85.641	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  19	01:39	   8.814.322	88.682	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  20	02:16	  12.992.337	95.159	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a5 Qb3a3+ Ka5b5 Qa3xa8 h4h3 Qa8c6+ Kb5b4 Qc6c3+ Kb4b5 Qc3b3+ Kb5a5 Kd6c5 h3h2 Qb3a2+
  20	02:18	  13.090.816	94.464	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a5 Qb3a3+ Ka5b5 Qa3xa8 h4h3 Qa8c6+ Kb5b4 Qc6c3+ Kb4b5 Qc3b3+ Kb5a5 Kd6c5 h3h2 Qb3a2+

TB Hits: 4,917.
All Nalimov TB are available (up to 5 pieces). What is curious for me is that I ran Chest UCI 5.2 with Special settings (K5, P4, X20) and it did not find any mate in 13... is Rybka mainline wrong?

Regards from Spain.

Ajedrecista.
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noctiferus
Posts: 364
Joined: Sun Oct 04, 2009 11:27 am
Location: Italy

Re: About a Mate in 13...

Post by noctiferus » Wed Nov 23, 2011 12:02 am

IMO, actually it is an error: the trouble is originated by 3...Qa8.

Moving to 3.Kd6, both Houdini 1.5 and Critter 1.2 agree on the following answer:

1. +- (#13): 3...Qh1 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxh1 Kxd2 7.Qxh4 Kd3 8.Kd5 Kd2 9.Qxf6 Ke3 10.Qxe5+ Kf3 11.Kd4 Kf2 12.Qf4+ Kg2 13.Qg4+ Kh2 14.Ke4 Kh1 15.Kf3 Kh2 16.Qg2#

2. +- (#13): 3...Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.Kd5 Kd3 8.Qf3+ Kxd2 9.Kc4 Ke1 10.Kd3 e4+ 11.Kxe4 Kd2 12.Kd4 Kc2 13.Qc3+ Kb1 14.Qb3+ Ka1 15.Kc3 h3 16.Qb2#

3. +- (#11): 3...Qb7 4.Qxb7 Kd3 5.Qf3+ Kc2 6.Kd5 h3 7.Qxh3 Kxd2 8.Qf3 Ke1 9.Qg2 Kd1 10.Qf2 e4 11.Kxe4 Kc1 12.Kd4 Kb1 13.Kc3 f5 14.Qb2#

4. +- (#10): 3...Qa8 4.Qe3+ Kc4 5.Qc3+ Kb5 6.Qb3+ Ka5 7.Qa3+ Kb5 8.Qxa8 Kb4 9.Qa2 h310.Kc6 e4 11.Qb2+ Ka4 12.Kc5 f5 13.Qa2#
meaning that the best defence allows a mate in 16.
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mhalstern
Posts: 484
Joined: Wed Nov 18, 2009 12:09 am

Re: About a Mate in 13...

Post by mhalstern » Wed Nov 23, 2011 12:49 am

Zappa with mate Extensions dosen't miss much. This indeed appears to be a mate in 16:

New game
8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Analysis by Zappa Mexico II 64:

1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kxd2 4.Qh8 h3 5.Qxh3
+- (7.15) Depth: 9/37 00:00:00 1255kN, tb=42
1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kxd2 4.Qh8 h3 5.Qxh3
+- (7.15) Depth: 9/37 00:00:00 1312kN, tb=42
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qh1 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxh1 Ke2 7.Qxh4 Kd3 8.Qf2
+- (7.40) Depth: 10/39 00:00:00 2592kN, tb=94
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qh1 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxh1 Ke2 7.Qxh4 Kd3 8.Qf2
+- (7.40) Depth: 10/39 00:00:00 2641kN, tb=95
1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kxe4 4.Qh7+ f5 5.d3+ Kf4 6.Kd6 Kf3 7.Qxf5+
+- (10.19) Depth: 11/41 00:00:01 5142kN, tb=436
1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kxe4 4.Qh7+ f5 5.d3+ Kf4 6.Kd6 Kf3 7.Qxf5+
+- (10.19) Depth: 11/41 00:00:01 5359kN, tb=438
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qh1 4.Qc3+ Ke4 5.Qc6+ Kf4 6.Qxh1 Kg3 7.Qg1+ Kf4 8.Qf2+ Kg5 9.Ke6 Kg4 10.Qxf6
+- (11.63) Depth: 12/43 00:00:04 21681kN, tb=3067
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qh1 4.Qc3+ Ke4 5.Qc6+ Kf4 6.Qxh1 Kg3 7.Qg1+ Kf4 8.Qf2+ Kg5 9.Ke6 Kg4 10.Qxf6
+- (11.63) Depth: 13/43 00:00:04 21976kN, tb=3075
1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kc2 4.Qc4+ Kb2 5.d4 h3 6.d5 h2 7.Qe2+ Kc3 8.Qxh2 Kd3 9.Qh7 Kd2
+- (17.57) Depth: 13/45 00:00:08 42901kN, tb=7625
1.Qb1 Qg8 2.Qa2+ Kd3 3.Qxg8 Kc2 4.Qc4+ Kb2 5.d4 h3 6.d5 h2 7.Qe2+ Kc3 8.Qxh2 Kd3 9.Qh7 Kd2
+- (17.57) Depth: 13/45 00:00:08 43696kN, tb=7653
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6
+- (#17) Depth: 14/47 00:00:16 82644kN, tb=15836
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6
+- (#17) Depth: 14/47 00:00:16 83119kN, tb=15883
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6 h3
+- (#17) Depth: 15/47 00:00:18 92856kN, tb=18832
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6 h3
+- (#17) Depth: 15/47 00:00:18 94093kN, tb=18976
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6
+- (#17) Depth: 16/51 00:00:21 112mN, tb=27707
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 e4 7.Kd5 e3 8.Qe4+ Kxd2 9.Qd4+ Ke2 10.Qxf6
+- (#17) Depth: 16/51 00:00:22 114mN, tb=28109
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 17/53 00:01:00 367mN, tb=137602
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 17/53 00:01:01 372mN, tb=138673
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 18/55 00:01:23 537mN, tb=211420
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 18/55 00:01:24 545mN, tb=213489
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 19/57 00:02:19 955mN, tb=392021
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5 9.Kxe5
+- (#16) Depth: 19/57 00:02:23 980mN, tb=398973
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 20/59 00:05:41 2520mN, tb=851566
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 20/59 00:05:48 2580mN, tb=867672
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 21/61 00:13:12 6163mN, tb=1789590
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5 9.Kxe5
+- (#16) Depth: 21/61 00:13:39 6395mN, tb=1886124
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 22/63 00:32:13 15301mN, tb=3717451
1.Qb1 Kd4 2.Qb3 Qxe4+ 3.Kd6 Qg2 4.Qc3+ Ke4 5.Qc6+ Kd3 6.Qxg2 Kc2 7.d4+ Kc3 8.dxe5 fxe5
+- (#16) Depth: 22/63 00:32:50 15642mN, tb=3824308

(Doe, 22.11.2011)
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Ajedrecista
Posts: 1455
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Re: About a Mate in 13...

Post by Ajedrecista » Wed Nov 23, 2011 9:34 am

Hello:
Ajedrecista wrote:Hello:

Analysis by Deep Rybka 4.1 w32 (2 cores) under Intel Pentium D930 (3 GHz) with 128 MB of hash:

[d]8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1

Code: Select all

Deep Rybka 4.1 w32:
   1	00:00	         145	923	-0,82	Qh1f3 Kc4b4 Qf3c3+
   2+	00:00	         161	1.025	-0,70	Qh1f3 Kc4b4 Qf3c3+
   2+	00:00	         163	1.038	-0,55	Qh1f3 Kc4b4 Qf3c3+
   2	00:00	         175	1.114	-0,44	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6
   3	00:00	         533	3.080	-0,74	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6 h4h3 Qc4c3+
   4+	00:00	         549	3.173	-0,62	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Kc6d6 h4h3 Qc4c3+
   4	00:00	         616	3.560	-0,60	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c4+
   5+	00:00	         810	4.682	-0,48	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+
   5+	00:00	         818	4.728	-0,33	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+
   5	00:00	         892	4.744	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   6	00:00	       1.167	6.207	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   7	00:00	       1.938	9.500	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   8	00:00	       3.677	16.713	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
   9	00:00	       7.220	27.041	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  10	00:00	      16.663	42.507	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  11	00:00	      23.958	47.820	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  12	00:00	      36.283	55.225	 0,00	Qh1f3 Kc4b4 Qf3c3+ Kb4a4 Qc3c4+ Ka4a3 Qc4c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+ Ka3a2 Qc3c2+ Ka2a3 Qc2c3+
  12+	00:01	      58.488	61.308	+0,12	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a6 Qb3a4+ Ka6b7 Qa4xh4 Qa8f8+ Kd6d5
  12+	00:01	      58.721	60.537	+0,27	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6
  12+	00:01	      59.282	61.115	+0,67	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+
  12+	00:01	      59.822	59.762	+6,27	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+
  12	00:05	     443.212	79.215	+11,04	Qh1b1 Kc4d4 Qb1b3 Kd4xe4 Qb3b1+ Ke4f3 Qb1xh7 Kf3g3 Qh7g6+ Kg3h2 Kc6d6 Kh2h3 Kd6e6 e5e4 Qg6xf6 Kh3g3 Qf6g5+ Kg3f3 Qg5e3+ Kf3g4 Qe3xe4+ Kg4g3 Ke6e5 h4h3 Qe4f4+ Kg3g2 Qf4g4+ Kg2h2 Ke5d6
  13	00:06	     467.636	78.134	+11,04	Qh1b1 Kc4d4 Qb1b3 Kd4xe4 Qb3b1+ Ke4f3 Qb1xh7 Kf3g3 Qh7g6+ Kg3h2 Kc6d6 Kh2h3 Kd6e6 e5e4 Qg6xf6 Kh3g3 Qf6g5+ Kg3f3 Qg5e3+ Kf3g4 Qe3xe4+ Kg4g3 Ke6e5 h4h3 Qe4f4+ Kg3g2 Qf4g4+ Kg2h2 Ke5d6
  14	00:23	   2.175.028	91.576	+M18	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Qh1e4 h4h3 Qe4g6+ Kg3f3 Qg6xf6+ Kf3e4 Qf6xe5+ Ke4f3 Qe5f5+ Kf3g3 Qf5e5+ Kg3g2 Qe5g7+ Kg2f3
  15	01:05	   4.992.213	76.234	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 h4h3 Qh1xe4 h3h2 Kf6e6 Kg3f2 Qe4f5+ Kf2g3 Qf5e5+ Kg3g2 d2d4 h2h1Q
  16	01:10	   5.515.543	78.285	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  17	01:14	   5.954.952	80.403	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  18	01:30	   7.766.648	85.641	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  19	01:39	   8.814.322	88.682	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4h1 Qb3c3+ Kd4e4 Qc3c6+ Ke4f4 Qc6xh1 Kf4g3 Kd6e6 e5e4 Ke6xf6 Kg3f4 Qh1h2+ Kf4g4 Kf6e5 Kg4h5 Qh2g1 h4h3 Ke5f6 Kh5h4 Qg1g5+
  20	02:16	  12.992.337	95.159	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a5 Qb3a3+ Ka5b5 Qa3xa8 h4h3 Qa8c6+ Kb5b4 Qc6c3+ Kb4b5 Qc3b3+ Kb5a5 Kd6c5 h3h2 Qb3a2+
  20	02:18	  13.090.816	94.464	+M13	Qh1b1 Kc4d4 Qb1b3 Qh7xe4+ Kc6d6 Qe4a8 Qb3e3+ Kd4c4 Qe3c3+ Kc4b5 Qc3b3+ Kb5a5 Qb3a3+ Ka5b5 Qa3xa8 h4h3 Qa8c6+ Kb5b4 Qc6c3+ Kb4b5 Qc3b3+ Kb5a5 Kd6c5 h3h2 Qb3a2+

TB Hits: 4,917.
All Nalimov TB are available (up to 5 pieces). What is curious for me is that I ran Chest UCI 5.2 with Special settings (K5, P4, X20) and it did not find any mate in 13... is Rybka mainline wrong?

Regards from Spain.

Ajedrecista.
Qa8 is the error, as more people stated. In less than five seconds (in my old Intel Pentium D930) Houdini found mate in ten starting with Qe3+, and preferred ...Qh1 or ...Qg2 with longer mates, starting with Qc3+. It was telltale that Chest UCI 5.2 did not find mate in 13.

It would be interesting that someone with fast hardware run Houdini 2.0 (or 2.0b or 2.0c) with Mate Search Function enabled.

Regards from Spain.

Ajedrecista.
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noctiferus
Posts: 364
Joined: Sun Oct 04, 2009 11:27 am
Location: Italy

Re: About a Mate in 13...

Post by noctiferus » Wed Nov 23, 2011 1:46 pm

A forgotten detail in my previous post:
Houdini and Critter without Nalimov, Gaviotas, Robbo bases.
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