OliThink

[chessica]

Thank you very much for the testing.

[d]4k3/R7/8/8/8/4K3/8/8 w - - 0 1

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 54	    #7 	15.0M  	0:00.94	e3d4 e8d8 d4e5 d8e8 e5d6 e8f8 d6e6 f8g8 e6f6 g8h8 f6g6 h8g8 a7a8 
 ...
 39	    #9 	9.11M  	0:00.61	e3d4 e8d8 d4e5 d8e8 e5e6 e8d8 a7d7 d8c8 e6d6 c8b8 d7c7 b8a8 d6c5 a8b8 c5b6 b8a8 
 ...
 34	    #8 	2.77M  	0:00.22	a7b7 e8d8 e3d4 d8c8 b7f7 c8d8 d4e5 d8c8 e5d6 c8b8 d6c6 b8a8 c6b6 a8b8 f7f8 
 ...
 26	  #10 	1.16M  	0:00.11	a7b7 e8d8 e3d4 d8c8 b7f7 c8d8 d4e5 d8c8 e5d6 c8b8 f7e7 b8c8 d6c6 c8b8 e7e8 b8a7 e8g8 a7a6 g8a8 
 21	  #10 	671349	0:00.08	a7b7 e8d8 e3d4 d8c8 b7f7 c8d8 d4e5 d8c8 e5d6 c8b8 f7e7 b8c8 d6c6 c8b8 e7e8 b8a7 e8g8 a7a6 g8a8 
 20	+6.52 	556743	0:00.08	a7b7 e8d8 e3d4 d8c8 b7f7 c8d8 d4e5 d8c8 e5e6 c8b8 f7e7 b8a8 e6d6 a8b8 d6e5 b8a8 e5d5 a8b8 d5c4 b8c8 
 ..
  1	+6.13 	5          	0:00.00	a7a2 
  0	#

 25	 -0.09 	22.9M  	0:04.44	(g1f3) b8c6 f1c4 f8c5 b1c3 g8f6 d2d3 d7d6 c3a4 c5b6 a2a3 c8g4 c2c3 e8g8 e1g1 c6a5 a4b6 a7b6 c4a2 a5c6 c1d2 g4e6 a2e6 

I am surprised to see still "jumping" in the matescore. Maybe something to check out.
Would you say that the mate-search has improved with the patches? --->>> yes, it's better...

[d]7k/5pp1/8/8/8/8/1K6/R7 w - - 0 1
and here the engine stops the calculation:

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 25	+6.24 	7.88M  	0:01.00	a1a7 h8g8 b2c3 g8f8 c3d4 g7g5 d4e5 f8g7 a7a6 g5g4 e5f4 g4g3 f4g3 g7f8 g3g4 f8e7 g4f5 e7d7 a6a7 d7d6 a7f7 d6d5 f7f6 d5d4 f6d6 d4c3 f5f4 
 24	+6.24 	6.69M  	0:00.84	a1a7 h8g8 b2c3 g8f8 c3d4 g7g5 d4e5 f8g7 a7a6 g5g4 e5f4 g4g3 f4g3 g7f8 g3g4 f8e7 g4f5 e7d7 a6a7 ...
  1	+3.83 	5          	0:00.00	a1c1 
  0	#

Of course this is a bug. I will try to investigate it. It happens with or without the patch? --->>> OliThink 5-11-4-gepatched

[/code]

[chessica]

[d]7k/5pp1/8/8/8/8/1K6/R7 w - - 8 1
#18 Ra7!

OliThink 5.11.9:

Code: Select all

 8	00:00,000	 8k	7.535k	+4,19	Kb2-c3 Kh8-g8 Ta1-a8+ Kg8-h7 Ta8-c8 Kh7-g6 Tc8-c5
 9	00:00,000	 18k	17.775k	+4,26	Kb2-c3 Kh8-h7 Ta1-f1 Kh7-g8 Tf1-f3 Kg8-f8 Tf3-d3 Kf8-g8 Td3-e3
 10	00:00,000	 29k	28.534k	+4,22	Kb2-c3 Kh8-h7 Ta1-f1 Kh7-g6 Tf1-f3 f7-f5 Tf3-d3 Kg6-g5 Td3-d4 f5-f4
 11	00:00,000	 56k	55.541k	+4,22	Kb2-c3 Kh8-h7 Ta1-f1 f7-f6 Tf1-f4 Kh7-h6 Tf4-d4 g7-g6 Td4-d5 Kh6-g7 Td5-d4
 12	00:00,015	 108k	6.730k	+4,25	Kb2-c3 Kh8-h7 Kc3-d4 f7-f6 Ta1-a7 Kh7-h8 Ta7-d7 Kh8-h7 Td7-f7 Kh7-g6 Tf7-a7
 13	00:00,015	 144k	9.030k	+4,25	Kb2-c3 Kh8-h7 Kc3-d4 f7-f6 Ta1-a7 Kh7-g8 Ta7-d7 g7-g6 Td7-a7 Kg8-f8 Ta7-h7
 14	00:00,031	 225k	7.016k	+4,31	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-d5 Kg6-f6 Ta1-f1+ Kf6-e7 Tf1-f3 Ke7-f8 Tf3-e3 g7-g6 Kd5-e5 Kf8-e7 Ke5-f4+ Ke7-f6
 15	00:00,047	 284k	5.911k	+4,40	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-h7 Ta1-a8 Kh7-g6 Ta8-a7 f7-f6+ Ke5-d5 Kg6-h6 Kd5-e6 Kh6-h7 Ta7-d7 Kh7-g6
 16	00:00,047	 387k	8.072k	+4,30	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-h7 Ta1-a7 Kh7-g8 Ke5-d6 g7-g6 Kd6-d5 f7-f5 Kd5-e6 f5-f4 Ta7-a8+ Kg8-g7
 17	00:00,062	 446k	7.077k	+4,40	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-h7 Ta1-a7 Kh7-g8 Ke5-d6 f7-f6 Kd6-d5 Kg8-h7 Kd5-e6 Kh7-h6 Ta7-f7 Kh6-g6 Tf7-d7
 18	00:00,172	 1.260k	7.285k	+5,75	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-g5 Ta1-g1+ Kg5-h6 Tg1-f1 Kh6-g6 Ke5-d5 Kg6-g5 Tf1xf7 g7-g6 Kd5-e6 Kg5-g4 Ke6-f6 Kg4-h5 Tf7-h7+ Kh5-g4 Th7-g7 Kg4-f4
 19	00:00,218	 1.674k	7.646k	+6,15	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-g5 Ta1-g1+ Kg5-h6 Tg1-f1 Kh6-g6 Ke5-d5 f7-f5 Kd5-e5 f5-f4 Tf1xf4 Kg6-h5 Tf4-f7 g7-g5 Ke5-f5 Kh5-h4 Tf7-g7 Kh4-g3 Tg7xg5+ Kg3-f3 Kf5-f6
 20	00:00,234	 1.815k	7.725k	+6,15	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 Kg6-g5 Ta1-g1+ Kg5-h6 Tg1-f1 Kh6-g6 Ke5-d5 f7-f5 Kd5-e5 f5-f4 Tf1xf4 Kg6-h5 Ke5-f5 g7-g5 Tf4-g4 Kh5-h6 Tg4xg5
 21	00:00,328	 2.555k	7.766k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-f7 Kf4-f5 Kf7-e7 Ta6-a7+ Ke7-d6 Ta7xg7 Kd6-c5 Tg7-d7 Kc5-c6 Td7-d1 Kc6-b6 Td1-d3
 22	00:00,390	 3.096k	7.917k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-f7 Kf4-f5 Kf7-e7 Ta6-a7+ Ke7-d6 Ta7xg7 Kd6-c5 Tg7-d7 Kc5-c4 Td7-d6 Kc4-b3 Kf5-f6 Kb3-c3 Td6-d5 Kc3-b3
 23	00:00,500	 3.958k	7.901k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-f7 Kf4-f5 Kf7-e7 Ta6-a7+ Ke7-d6 Ta7xg7 Kd6-c5 Tg7-d7 Kc5-b5 Kf5-f6 Kb5-b4 Td7-f7 Kb4-c3 Tf7-g7 Kc3-b4 Tg7-d7
 24	00:00,765	 5.793k	7.563k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-f7 Kf4-f5 Kf7-e7 Ta6-a7+ Ke7-d6 Ta7xg7 Kd6-c5 Tg7-d7 Kc5-b4 Kf5-g6 Kb4-c3 Kg6-g5 Kc3-b2 Kg5-f5 Kb2-b3
 25	00:00,859	 6.395k	7.436k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-e7 Kf4-f5 Ke7-d7 Ta6-a7+ Kd7-c6 Ta7xg7 Kc6-d6 Kf5-f6 Kd6-c5 Tg7-c7+ Kc5-d4 Tc7-c6 Kd4-d3 Tc6-e6 Kd3-c2 Te6-e5
 26	00:01,234	 9.106k	7.373k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-e7 Kf4-f5 Ke7-d7 Ta6-a7+ Kd7-c6 Ta7xg7 Kc6-d6 Kf5-f6 Kd6-c5 Tg7-c7+ Kc5-d4 Tc7-c6 Kd4-d3 Tc6-e6 Kd3-d2 Te6-e4 Kd2-c2
 27	00:01,406	 10.284k	7.309k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-e7 Kf4-f5 Ke7-d7 Ta6-g6 Kd7-e7 Tg6xg7+ Ke7-d6 Tg7-g6+ Kd6-c5 Tg6-e6 Kc5-c4 Te6-e5 Kc4-c3 Te5-e8 Kc3-d2 Te8-e4 Kd2-c2
 28	00:01,828	 13.310k	7.277k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f5 Ta1-a7 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-e7 Kf4-f5 Ke7-d7 Ta6-g6 Kd7-e7 Tg6xg7+ Ke7-d6 Tg7-g6+ Kd6-c5 Tg6-e6 Kc5-c4 Te6-e5 Kc4-d3 Te5-e7 Kd3-c2 Te7-d7 Kc2-b3
 29	00:03,000	 21.954k	7.315k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f6+ Ke5-e4 Kg6-f7 Ta1-a7+ Kf7-e6 Ta7xg7 f6-f5+ Ke4-e3 Ke6-d5 Ke3-f4 Kd5-c4 Tg7-c7+ Kc4-d3 Kf4xf5 Kd3-e3 Tc7-d7 Ke3-f3 Td7-d3+ Kf3-e2 Td3-g3 Ke2-d2 Kf5-f6 Kd2-e2 Tg3-g5 Ke2-d3 Tg5-d5+ Kd3-c2 Td5-e5
 30	00:03,297	 24.088k	7.304k	+6,26	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f6+ Ke5-e4 Kg6-f7 Ta1-a7+ Kf7-e6 Ta7xg7 f6-f5+ Ke4-e3 Ke6-d5 Ke3-f4 Kd5-c4 Tg7-c7+ Kc4-d3 Kf4xf5 Kd3-d4 Tc7-d7+ Kd4-c3 Td7-d6 Kc3-c2 Kf5-e4 Kc2-b3 Ke4-e5 Kb3-c2 Td6-d7 Kc2-b3
 31	00:04,859	 40.345k	8.301k	+M17	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f6+ Ke5-f4 Kg6-f7 Ta1-a7+ Kf7-e6 Ta7xg7 Ke6-d5 Kf4-f5 Kd5-c6 Kf5xf6 Kc6-d5 Tg7-g4 Kd5-d6 Tg4-g5 Kd6-c6 Kf6-e7 Kc6-b7 Ke7-d6 Kb7-b6 Tg5-d5 Kb6-b7 Td5-b5+ Kb7-a6 Kd6-c6 Ka6-a7 Tb5-a5+ Ka7-b8
 32	00:05,531	 47.142k	8.522k	+M17	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f6+ Ke5-e4 Kg6-g5 Ta1-g1+ Kg5-h6 Ke4-f5 Kh6-h7 Tg1-h1+ Kh7-g8 Th1-a1 Kg8-f7 Ta1-a7+ Kf7-e8 Ta7xg7 Ke8-d8 Kf5-g6 f6-f5 Kg6xf5 Kd8-c8 Kf5-e4 Kc8-b8 Ke4-d5 Kb8-c8 Tg7-f7 Kc8-b8 Kd5-e5 Kb8-c8
 33	00:06,609	 57.751k	8.737k	+M16	Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f7-f6+ Ke5-e4 Kg6-g5 Ta1-g1+ Kg5-h6 Ke4-f5 Kh6-h7 Tg1-h1+ Kh7-g8 Kf5-e6 f6-f5 Ke6xf5 Kg8-f8 Th1-e1 Kf8-f7 Te1-e4 g7-g5 Kf5xg5 Kf7-g7 Te4-e7+ Kg7-f8 Kg5-f6 Kf8-g8 Te7-a7 Kg8-h8
 34	00:07,875	 69.421k	8.814k	+M16	Kb2-c3 g7-g5 Kc3-d4 Kh8-g7 Kd4-e5 Kg7-g6 Ta1-a6+ Kg6-g7 Ke5-f5 Kg7-f8 Ta6-a7 g5-g4 Kf5xg4 Kf8-e8 Kg4-f5 Ke8-d8 Ta7xf7 Kd8-c8 Tf7-g7 Kc8-b8 Kf5-e6 Kb8-a8 Ke6-e5 Ka8-b8 Ke5-d6 Kb8-a8 Tg7-g5 Ka8-b7 Tg5-d5 Kb7-a6 Kd6-c6
 35	00:10,578	 96.412k	9.114k	+M15	Ta1-a7 Kh8-g8 Kb2-c3 f7-f5 Kc3-d4 f5-f4 Kd4-e4 Kg8-f8 Ke4xf4 g7-g6 Ta7-h7 Kf8-g8 Th7-b7 Kg8-f8 Kf4-e5 Kf8-e8 Ke5-d6 g6-g5 Tb7-g7 Ke8-f8 Tg7xg5 Kf8-f7 Tg5-f5+ Kf7-g8 Kd6-e5 Kg8-g7 Ke5-e6 Kg7-g6 Tf5-d5
 36	00:11,625	 106.600k	9.169k	+M15	Ta1-a7 Kh8-g8 Kb2-c3 f7-f5 Kc3-d4 f5-f4 Kd4-e4 f4-f3 Ke4xf3 Kg8-h7 Kf3-f4 Kh7-g6 Kf4-e5 Kg6-h6 Ke5-f5 g7-g6+ Kf5-f4 g6-g5+ Kf4-g4 Kh6-g6 Ta7-a5 Kg6-f7 Ta5xg5 Kf7-e7 Kg4-f4 Ke7-d6 Kf4-e3 Kd6-c7 Ke3-d4
 37	00:14,000	 130.496k	9.320k	+M15	Ta1-a7 Kh8-g8 Kb2-c3 g7-g5 Kc3-d4 Kg8-g7 Kd4-e5 Kg7-g6 Ta7-a6+ Kg6-h5 Ke5-f5 Kh5-h4 Ta6-f6 g5-g4 Tf6xf7 Kh4-g3 Kf5-g5 Kg3-h3 Kg5-f4 g4-g3 Tf7-g7 Kh3-g2 Tg7xg3+ Kg2-f2 Tg3-g6 Kf2-f1 Kf4-e3 Kf1-e1
 38	00:15,890	 149.391k	9.401k	+M14	Ta1-a7 Kh8-g8 Kb2-c3 g7-g5 Kc3-d4 Kg8-g7 Kd4-e4 g5-g4 Ke4-e5 g4-g3 Ta7-a1 f7-f6+ Ke5-f5 g3-g2 Ta1-g1 Kg7-f7 Tg1xg2 Kf7-e7 Tg2-d2 Ke7-f7 Td2-e2 Kf7-f8 Kf5xf6 Kf8-g8 Te2-g2+ Kg8-h7 Tg2-g1
 39	00:19,203	 180.654k	9.407k	+M14	Ta1-a7 Kh8-g8 Kb2-c3 g7-g5 Kc3-d4 Kg8-g7 Kd4-e5 Kg7-g6 Ta7-a6+ Kg6-h5 Ke5-f5 Kh5-h4 Ta6-f6 g5-g4 Tf6xf7 Kh4-g3 Kf5-g5 Kg3-h3 Kg5-f4 g4-g3 Kf4-f3 Kh3-h4 Tf7-g7 g3-g2 Kf3-f4 Kh4-h5
 40	00:23,359	 226.450k	9.694k	+M14	Ta1-a7 f7-f5 Kb2-c3 Kh8-h7 Kc3-d4 Kh7-g6 Kd4-e5 f5-f4 Ke5xf4 Kg6-f6 Ta7-a6+ Kf6-e7 Kf4-e5 Ke7-d7 Ta6-g6 Kd7-c7 Tg6xg7+ Kc7-c6 Tg7-g5 Kc6-b5 Ke5-d4+ Kb5-b4 Kd4-d3 Kb4-b3 Tg5-g4 Kb3-b2 Tg4-b4+
 41	00:28,000	 272.420k	9.729k	+M14	Ta1-a7 f7-f6 Kb2-c3 g7-g6 Kc3-d4 Kh8-g8 Kd4-d5 f6-f5 Kd5-e5 Kg8-f8 Ta7-c7 Kf8-e8 Tc7-c6 f5-f4 Ke5xf4 Ke8-d7 Tc6xg6 Kd7-c7 Kf4-e4 Kc7-b7 Ke4-d4 Kb7-a7 Kd4-c5 Ka7-b7 Tg6-g7+ Kb7-b8
 42	00:40,484	 409.622k	10.118k	+M14	Ta1-a7 f7-f6 Kb2-c3 g7-g6 Kc3-d4 Kh8-g8 Kd4-d5 f6-f5 Kd5-e5 Kg8-f8 Ta7-c7 Kf8-e8 Tc7-g7 Ke8-f8 Tg7xg6 Kf8-e8 Ke5xf5 Ke8-d7 Kf5-f4 Kd7-e8 Tg6-g3 Ke8-f8 Tg3-e3 Kf8-g7 Kf4-g5 Kg7-h8 Te3-f3
 43	00:51,047	 523.501k	10.255k	+M14	Ta1-a7 f7-f6 Kb2-c2 f6-f5 Kc2-d3 g7-g6 Kd3-e3 Kh8-g8 Ta7-a6 g6-g5 Ta6-a5 Kg8-f7 Ta5xf5+ Kf7-g6 Ke3-e4 g5-g4 Ke4-f4 g4-g3 Tf5-g5+ Kg6-f6 Tg5xg3 Kf6-e6 Kf4-e4 Ke6-e7 Tg3-d3 Ke7-f8 Td3-d7
 44	01:01,140	 625.256k	10.226k	+M14	Ta1-a7 f7-f6 Kb2-c2 f6-f5 Kc2-d3 g7-g6 Kd3-e3 Kh8-g8 Ta7-a6 g6-g5 Ta6-f6 Kg8-g7 Tf6xf5 Kg7-g6 Ke3-e4 g5-g4 Ke4-f4 g4-g3 Tf5-g5+ Kg6-f6 Tg5xg3 Kf6-e7 Tg3-d3 Ke7-e6 Td3-d4 Ke6-f6
 45	01:31,484	 955.586k	10.445k	+M14	Kb2-c2 f7-f6 Kc2-d3 Kh8-h7 Kd3-e3 Kh7-g6 Ke3-f4 Kg6-f7 Ta1-a7+ Kf7-e6 Ta7xg7 Ke6-d6 Tg7-g6 Kd6-c6 Kf4-e4 Kc6-b7 Tg6xf6 Kb7-a7 Ke4-e5 Ka7-b7 Ke5-d5 Kb7-c7 Tf6-f1 Kc7-b7 Kd5-c5 Kb7-c7
 46	01:54,500	 1.225.479k	10.703k	+M14	Kb2-c2 Kh8-h7 Kc2-d3 g7-g5 Kd3-e4 Kh7-g6 Ta1-a6+ Kg6-h5 Ta6-f6 Kh5-g4 Tf6xf7 Kg4-g3 Ke4-e3 g5-g4 Tf7-g7 Kg3-h3 Ke3-f4 Kh3-g2 Tg7xg4+ Kg2-f2 Kf4-e4 Kf2-e2 Ke4-d4 Ke2-d1 Kd4-c3 Kd1-e2

[OliverBr]

[d]7k/5pp1/8/8/8/8/1K6/R7 w - - 8 1
#18 Ra7!

Yes, there is an issue.
It's even more evident, if you fast forward 7 moves, OliThink says mate in 7, while it's mate in 11. (Following with the UCI version, same result of course)

Code: Select all

position fen 7k/5pp1/8/8/8/8/1K6/R7 w - - 8 1 moves a1a7 f7f5 b2c3 h8g8 c3d4 f5f4 d4e4 g7g5 a7a5 g8f8 a5g5 f8e7 e4f4 e7e6
go ponder infinite
...
info depth 50 score mate 7 time 9378 nodes 84537807 nps 9013520 pv g5g3 e6d5 g3c3 d5d6 f4f5 d6d5 c3d3 d5c6 f5e5 c6c5 d3g3 c5b5

"Mate 7" ist something like a "limit" here, because if you forward more moves it's staying with 7 oder jumping back to 8 until it's correct.

The issue hadn't been addressed, because it doesn't seem to have impact on the playing strength. But maybe the reason for this issue has. I will look into it.