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Subject: Re: mate-in 16

Author: Pallav Nawani

Date: 20:04:40 03/25/05

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Natwarlal can't find the Mate in 16, unfortunately :( . Though it finds another
mate in 18:
FEN: 8/8/8/2p5/R1P5/P5p1/P3K1p1/6k1 w - - 0 1

Natwarlal v0.12:
   1	00:00	           1	1	+3.49	Ra4a7
   1	00:00	          11	11	+3.49	Ra4a7
   2	00:00	          14	14	+3.49	Ra4a7 Kg1h1
   2	00:00	          43	43	+3.49	Ra4a7 Kg1h1
   3	00:00	          67	67	+3.94	Ra4a7 Kg1h1 Ra7h7+ Kh1g1
   3	00:00	         201	201	+3.94	Ra4a7 Kg1h1 Ra7h7+ Kh1g1
   4	00:00	         276	276	+4.11	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2e3
   4	00:00	         595	595	+4.11	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2e3
   5	00:00	         776	77.600	+3.90	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2e3 Kg1f1
   5	00:00	       1.359	135.900	+3.90	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2e3 Kg1f1
   6	00:00	       2.067	206.700	+4.13	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2d2 Kg1f1
Rh7f7+ Kf1g1 Kd2d3
   6	00:00	       3.426	68.520	+4.13	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2d2 Kg1f1 Rh7f7+
Kf1g1 Kd2d3
   7	00:00	       5.256	105.120	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+ Kg3g4
   7	00:00	       9.395	156.583	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+ Kg3g4
   8	00:00	      12.509	208.483	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3
   8	00:00	      19.077	158.975	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3
   9	00:00	      26.789	206.069	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+
   9	00:00	      41.257	257.856	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+
  10	00:00	      53.064	279.284	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+ Kg3g4
  10	00:00	      75.152	326.747	+4.85	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Ng1e2+ Kg3g4
  11	00:00	     102.958	367.707	+5.02	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Kf1e1 Kg3f4 Ng1e2+ Kf4e5 Ne2c3 Ke5d6
  11	00:00	     122.107	381.584	+5.19	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 Rf6f5 Kg1h2 Rf5h5+ Kh2g1 Rh5xc5 Kg1h2 Rc5h5+ Kh2g1 Rh5h7
  11	00:00	     139.389	398.254	+5.19	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 Rf6f5 Kg1h2 Rf5h5+ Kh2g1 Rh5xc5 Kg1h2 Rc5h5+ Kh2g1 Rh5h7
  12	00:00	     181.400	431.904	+5.19	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 Rf6f5 Kg1h2 Rf5h5+ Kh2g1 Rh5xc5
  12	00:00	     223.131	455.369	+5.19	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 Rf6f5 Kg1h2 Rf5h5+ Kh2g1 Rh5xc5
  13	00:00	     283.143	471.905	+5.28	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 Rf6f5 Kg1h2 Rf5h5+ Kh2g1 a3a4 Kg1f1 Rh5f5+ Kf1g1 Rf5xc5 Kg1h2
Rc5h5+ Kh2g1 Rh5h7
  13	00:00	     340.957	494.140	+5.30	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Kf1e1 Rd7d5 Ng1e2+ Kg3g4 Ne2c3 Rd5xc5 Nc3xa2 Rc5e5+ Ke1d1
  13	00:00	     351.528	495.109	+5.30	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Kf1e1 Rd7d5 Ng1e2+ Kg3g4 Ne2c3 Rd5xc5 Nc3xa2 Rc5e5+ Ke1d1
  14	00:01	     439.612	511.176	+5.29	Ra4a7 Kg1h1 Ra7h7+ Kh1g1 Ke2f3 Kg1f1 Rh7d7
g2g1=N+ Kf3xg3 Kf1e1 Rd7d5 Ng1e2+ Kg3g4 Ne2d4 a3a4 Ke1e2 Rd5xc5 Ke2d3
  14	00:01	     442.867	509.042	+12.69	Ra4a6!! (Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1 a5a6 Kg1h2 )
  14	00:01	     442.868	509.043	+12.69	Ra4a6!! Kg1h1 (Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1 a5a6 Kg1h2 )
  14	00:01	     455.396	500.435	+12.69	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1 a5a6 Kg1h2 Rf6h6+
Kh2g1 a6a7 Kg1f2 Rh6f6+ Kf2g1 a7a8=Q
  14	00:01	     477.802	497.710	+12.69	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1 a5a6 Kg1h2 Rf6h6+
Kh2g1 a6a7 Kg1f2 Rh6f6+ Kf2g1 a7a8=Q
  15	00:01	     553.870	508.137	+12.69	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1
  15	00:01	     629.178	519.981	+12.69	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1
  16	00:01	     751.226	529.032	+12.69	Ra4a6 Kg1h1 Ra6h6+ Kh1g1 Ke2d2 Kg1f1
Rh6f6+ Kf1g1 a3a4 Kg1h2 Rf6h6+ Kh2g1 a4a5 Kg1f1 Rh6f6+ Kf1g1 a5a6
  16	00:01	     796.495	534.560	+13.06	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a4a5 Kg1f1 Rh8f8+ Kf1g1 a5a6 Kg1h2 Rf8h8+
Kh2g1 a6a7 Kg1f1 Rh8f8+ Kf1g1 a7a8=Q Kg1h2 Rf8h8+ Kh2g1 Qa8b7
  16	00:01	     856.452	538.649	+13.06	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a4a5 Kg1f1 Rh8f8+ Kf1g1 a5a6 Kg1h2 Rf8h8+
Kh2g1 a6a7 Kg1f1 Rh8f8+ Kf1g1 a7a8=Q Kg1h2 Rf8h8+ Kh2g1 Qa8b7
  17	00:02	   1.049.756	549.610	+13.06	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a4a5 Kg1f1 Rh8f8+ Kf1g1 a5a6 Kg1h2
  17	00:02	   1.211.416	563.449	+13.06	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a4a5 Kg1f1 Rh8f8+ Kf1g1 a5a6 Kg1h2
  18	00:02	   1.496.990	571.370	+14.00	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 Rh8h7 Kg1f1 Rh7f7+ Kf1g1 a4a5 Kg1h2 Rf7h7+
Kh2g1 a5a6 Kg1f2 Rh7f7+ Kf2g1 a6a7 Kg1h2 Rf7h7+ Kh2g1 a7a8=Q Kg1f2 Qa8f8+ Kf2g1
Qf8xc5+ Kg1f1
  18	00:03	   1.718.981	578.781	+14.00	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 Rh8h7 Kg1f1 Rh7f7+ Kf1g1 a4a5 Kg1h2 Rf7h7+
Kh2g1 a5a6 Kg1f2 Rh7f7+ Kf2g1 a6a7 Kg1h2 Rf7h7+ Kh2g1 a7a8=Q Kg1f2 Qa8f8+ Kf2g1
Qf8xc5+ Kg1f1
  19	00:03	   1.722.931	576.231	+M18	Ra4a8!! (Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+
Kh2g1 a5a6 Kg1f2 Rh8f8+ )
  19	00:03	   1.722.932	576.231	+M18	Ra4a8!! Kg1h1 (Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+
Kh2g1 a5a6 Kg1f2 Rh8f8+ )
  19	00:03	   1.722.933	576.231	+M18	Ra4a8!! Kg1h1 (Ra8h8+ Kh1g1 Ke2d2 Kg1f1
Rh8f8+ Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+
Kh2g1 a5a6 Kg1f2 Rh8f8+ )
  19	00:03	   1.762.032	573.951	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1 a6a7 Kg1h2 Rf8h8+ Kh2g1 a7a8=Q Kg1f2 Qa8f8+ Kf2g1
Qf8xc5+ Kg1f1
  19	00:03	   1.842.941	574.124	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1 a6a7 Kg1h2 Rf8h8+ Kh2g1 a7a8=Q Kg1f2 Qa8f8+ Kf2g1
Qf8xc5+ Kg1f1
  20	00:03	   2.047.341	573.484	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6
  20	00:04	   2.358.668	537.282	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6
  21	00:05	   2.839.154	543.899	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2
  21	00:05	   3.337.844	576.484	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2
  22	00:07	   4.116.163	571.689	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+
  22	00:09	   5.092.702	558.410	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+
  23	00:11	   6.353.436	558.298	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1
  23	00:13	   7.540.686	555.278	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1
  24	00:16	   9.405.290	557.185	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1 a6a7
  24	00:23	  12.435.371	528.490	+M18	Ra4a8 Kg1h1 Ra8h8+ Kh1g1 Ke2d2 Kg1f1 Rh8f8+
Kf1g1 a3a4 Kg1h2 Rf8h8+ Kh2g1 a2a3 Kg1f1 Rh8f8+ Kf1g1 a4a5 Kg1h2 Rf8h8+ Kh2g1
a5a6 Kg1f2 Rh8f8+ Kf2g1 a6a7


Pallav



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