MadChess 3.2 Released

[emadsen]

I have released version 3.2 of my chess engine.

The main feature in this release is a sophisticated limit-strength mode, including adjustments to chess knowledge, search speed, chance of erring or blundering, and severity of blunders. MadChess, in limit-strength mode, excludes moves it considers unreasonable (dumb moves even a chess novice wouldn’t play). I have extensively documented the settings and technical implementation of MadChess’ limit-strength mode in The MadChess UCI_LimitStrength Algorithm. I also provide a Limit-Strength FAQ.

MadChess 3.2 is slightly stronger than the prior release. I estimate it has gained 60 rating points, climbing to roughly 2770 Elo at bullet chess.

This likely is the last release of MadChess- at least for a long while. I plan to focus more on playing chess instead of coding chess. And I plan to move on to other (non-chess) programming projects. You may follow along on my general programming blog, ErikTheCoder. Nothing new there yet. But I intend to resume blogging there soon. I’ll keep blogging on MadChess.net also, focused as I said on playing the game, not coding it.

You may download x64 and x86 versions of MadChess 3.2 from the Downloads page. Install the appropriate version for your computer’s CPU. The x64 binary is the strongest version of the engine.

Enjoy!

[Graham Banks]

Thanks, Erik.

[Dariusz]

Thank you very much, Erik

[chessica]

Thank you very much.

[lithander]

This likely is the last release of MadChess- at least for a long while. I plan to focus more on playing chess instead of coding chess. And I plan to move on to other (non-chess) programming projects.

I get the sentiment though. I think you've made a well rounded package there that you'll be able to look back at with pride and without the feeling of having abandoned a project too early! You've been an inspiration to me. For the longest time MadChess was the strongest C# engine I knew and that I want to catch up to!

[AndrewGrant]

Congrats, Erik.

I'll be sure to read through the UCI strength components, as every attempt at that I've ever seen has been wildly unique.

[chessica]

[d]5k2/pp3N2/5K2/5B2/8/8/8/8 w - - 0 1 MadChess-1.0:

Code: Select all

 1/2	00:00,583	 24	41	+5,45	Sf7-e5
 2/3	00:00,666	 229	343	+5,25	Sf7-d6 b7-b6
 3/4	00:00,673	 774	1k	+5,50	Sf7-d6 b7-b6 Kf6-e5
 4/6	00:00,684	 2k	3k	+5,65	Sf7-d6 b7-b6 Sd6-c8 Kf8-e8
 5/8	00:00,714	 7k	9k	+5,65	Sf7-d6 b7-b6 Sd6-c8 Kf8-e8 Sc8xa7
 6/9	00:00,775	 17k	22k	+5,85	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 Kg8-f8
 7/10	00:00,992	 42k	43k	+5,85	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 Kg8-f8 Sc8xa7
 8/11	00:01,403	 106k	75k	+5,95	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 Kg8-f8 Ld3-b5 a7-a6
 9/12	00:02,593	 293k	113k	+6,00	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 Kg8-f8 Sc8xa7 Kf8-e8 Sa7-c6
 10/13	00:04,191	 576k	137k	+6,25	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 b6-b5 Ld3xb5 a7-a5 Sc8-d6 Kg8-f8
 11/14	00:07,582	 1.181k	156k	+6,50	Sf7-d6 b7-b6 Lf5-d3 Kf8-g8 Sd6-c8 b6-b5 Ld3xb5 a7-a5 Sc8-d6 Kg8-f8 Kf6-e5
 12/15	00:15,766	 2.618k	166k	+6,90	Sf7-d6 b7-b6 Lf5-g6 Kf8-g8 Sd6-c8 a7-a5 Sc8xb6 Kg8-h8 Lg6-c2 Kh8-g8 Lc2-d3 Kg8-f8
 13/16	00:34,770	 5.697k	164k	+7,35	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 Sb7-c5 Ke8-d8 Kf6-e5
 14/18	01:14,981	 11.462k	153k	+7,20	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 Kf6-e6 Ke8-f8 Sb7-d6 Kf8-g7
 15/18	04:26,633	 24.503k	92k	+7,35	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 Kf6-e6 Ke8-f8 Sb7-d6 Kf8-g7 Ke6-d5
 16/20	16:55,924	 67.922k	67k	+7,60	Sf7-d6 a7-a5 Lf5-d7 a5-a4 Ld7xa4 Kf8-g8 Sd6xb7 Kg8-h7 Sb7-c5 Kh7-h6 La4-e8 Kh6-h7 Sc5-e6 Kh7-h6 Kf6-e5 Kh6-h7
 17/21	51:25,992	 189.701k	61k	+7,60	Lf5-d7 a7-a5 Sf7-g5 a5-a4 Ld7xa4 b7-b6 La4-d7 Kf8-g8 Ld7-e6+ Kg8-h8 Le6-f7 b6-b5 Kf6-g6 b5-b4 Sg5-e4 b4-b3 Lf7xb3

Code: Select all

MadChess-2.0:

Code: Select all

 1/2	00:00,150	 52	346	+4,38	Sf7-e5
 2/3-	00:00,164	 90	550	 0,00	
 2/3	00:00,166	 177	1k	+4,06	Sf7-d6 b7-b6
 3/4	00:00,167	 399	2k	+4,27	Sf7-d6 b7-b6 Kf6-e5
 4/4-	00:00,167	 764	5k	 0,00	
 4/6	00:00,169	 2k	10k	+3,79	Sf7-d6 b7-b6 Kf6-e5 a7-a5
 5/8	00:00,198	 4k	19k	+3,95	Sf7-e5 b7-b5 Se5-g6+ Kf8-g8 Sg6-e5
 6/8-	00:00,203	 7k	34k	 0,00	
 6/8	00:00,207	 9k	41k	+3,88	Sf7-d6 b7-b6 Kf6-e5 a7-a6 Lf5-e6 b6-b5
 7/10	00:00,214	 14k	65k	+3,99	Sf7-d6 b7-b6 Kf6-e5 a7-a6 Lf5-e6 b6-b5 Le6-d5
 8/10	00:00,269	 26k	98k	+3,91	Sf7-d6 b7-b6 Lf5-d3 a7-a5 Sd6-c4 b6-b5 Sc4xa5 b5-b4
 9/11+	00:00,274	 30k	111k	 0,00	
 9/12	00:00,301	 48k	158k	+4,42	Sf7-d6 b7-b6 Sd6-c8 b6-b5 Sc8xa7 b5-b4 Lf5-e6 Kf8-e8 Sa7-c6
 10/12	00:00,356	 86k	242k	+4,57	Sf7-d6 a7-a5 Lf5-c2 b7-b6 Lc2-b3 b6-b5 Sd6xb5 Kf8-e8 Sb5-d6+ Ke8-d8
 11/13	00:00,467	 171k	367k	+4,80	Sf7-d6 a7-a5 Lf5-c2 b7-b6 Lc2-b3 b6-b5 Sd6xb5 Kf8-e8 Sb5-d6+ Ke8-d7 Kf6-e5
 12/14	00:00,568	 250k	440k	+4,80	
 12/14	00:00,807	 436k	540k	+4,96	Sf7-d6 b7-b6 Sd6-c8 Kf8-e8 Sc8xa7 Ke8-d8 Sa7-b5 Kd8-e8 Sb5-d6+ Ke8-d8 Kf6-e5 Kd8-e7
 13/15	00:00,885	 500k	565k	+4,96	
 13/15	00:01,041	 614k	590k	+5,17	Sf7-d6 b7-b6 Sd6-c8 Kf8-e8 Sc8xa7 Ke8-d8 Sa7-b5 Kd8-e8 Sb5-d6+ Ke8-d8 Kf6-e5 Kd8-c7 Lf5-e4
 14/16	00:01,818	 1.250k	688k	+5,17	
 14/16	00:01,885	 1.316k	698k	+5,91	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-h8 Sb7-a5 Kh8-g8 Sa5-c6 a7-a6 Lf5-d3 Kg8-f8 Ld3xa6 Kf8-e8 La6-c4 Ke8-d7
 15/17	00:02,362	 1.750k	741k	+5,91	
 15/17	00:02,528	 1.921k	760k	+6,01	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-h8 Sb7-a5 Kh8-g8 Sa5-c6 a7-a6 Lf5-d3 Kg8-f8 Ld3xa6 Kf8-e8 La6-c4 Ke8-d7 Sc6-d4
 16/18	00:03,907	 3.250k	832k	+6,01	
 16/18	00:04,010	 3.354k	836k	+5,91	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-h8 Sb7-a5 Kh8-g8 Sa5-c6 a7-a6 Lf5-d3 Kg8-f8 Ld3xa6 Kf8-e8 La6-c4 Ke8-d7 Sc6-d4 Kd7-d8
 17/19	00:06,217	 5.500k	885k	+5,91	
 17/19	00:06,461	 5.730k	887k	+6,13	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-g8 Sa5-c6 a7-a6 Lf5-d3 Kg8-f8 Ld3xa6 Kf8-e8 La6-c4 Ke8-d7 Sc6-e5+ Kd7-d6 Lc4-e6
 18/20	00:10,725	 10.000k	932k	+6,13	
 18/20	00:10,787	 10.064k	933k	+6,29	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 Sb7-d6+ Ke8-f8 Kf6-e5 Kf8-g7 Sd6-f5+ Kg7-g6 La2-d5 Kg6-h5
 19/22	00:15,892	 15.250k	960k	+6,29	
 19/22	00:16,123	 15.499k	961k	+6,36	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 La2-e6 Ke8-f8 Le6-c4 Kf8-e8 Sb7-d6+ Ke8-f8 Kf6-e5 Kf8-g7 Lc4-d5
 20/22	00:26,800	 26.500k	989k	+6,36	
 20/22	00:26,900	 26.608k	989k	+6,34	Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-f7 a4-a3 Sd6xb7 a3-a2 Lf7xa2 Kf8-e8 La2-e6 Ke8-f8 Le6-c4 Kf8-e8 Sb7-d6+ Ke8-f8 Kf6-e5 Kf8-g7 Lc4-f7 Kg7-h6
 21/24	00:46,293	 46.750k	1.010k	+6,34	
 21/24	00:46,554	 46.992k	1.009k	+6,48	Lf5-d7 a7-a5 Sf7-g5 a5-a4 Ld7xa4 b7-b5 La4xb5 Kf8-g8 Lb5-d7 Kg8-h8 Ld7-a4 Kh8-g8 La4-b3+ Kg8-h8 Lb3-c2 Kh8-g8 Sg5-e6 Kg8-h8 Kf6-e5 Kh8-g8 Lc2-e4
 22/24	01:11,288	 72.250k	1.014k	+6,48	
 22/24	01:11,521	 72.475k	1.013k	+6,44	Lf5-d7
 23/27	08:24,204	 418.250k	830k	+6,44	
 23/27	08:24,243	 418.282k	830k	+M11	Lf5-d7 b7-b6
 24/28	41:43,497	 1.958.500k	782k	+M11	
 24/28	41:43,803	 1.958.719k	782k	+M11	Lf5-d7 a7-a6 Sf7-g5 b7-b5
 25/29	55:00,489	 2.578.750k	781k	+M11	

MadChess-3.0:

Code: Select all

 1/2	00:00,123	 55	446	+9,78	Sf7-e5
 2/3	00:00,134	 155	1k	+9,52	Sf7-d6 b7-b6
 3/4	00:00,136	 294	2k	+9,66	Sf7-d6 b7-b6 Kf6-e5
 4/6	00:00,137	 866	6k	+9,04	Sf7-d6 a7-a5 Kf6-e5 a5-a4
 5/7	00:00,140	 3k	19k	+9,02	Sf7-d6 a7-a5 Lf5-e6 b7-b6 Kf6-e5
 6/8	00:00,174	 13k	73k	+8,63	Sf7-d8 a7-a5 Sd8xb7 Kf8-e8
 7/12	00:00,185	 20k	108k	+9,38	Sf7-d6 b7-b6 Sd6-c8 b6-b5 Sc8xa7 b5-b4 Sa7-c6
 8/12	00:00,233	 37k	157k	+8,62	Sf7-d6 b7-b6 Sd6-c8 b6-b5 Sc8xa7 b5-b4 Lf5-e6 Kf8-e8
 9/12	00:00,311	 57k	183k	+9,45	Sf7-d6 b7-b6 Sd6-c8 b6-b5 Sc8xa7 b5-b4 Lf5-e6 Kf8-e8 Sa7-c6
 10/12	00:00,399	 116k	290k	+9,71	Sf7-d6 b7-b6 Sd6-c8 a7-a5 Lf5-d7 b6-b5 Ld7xb5 Kf8-g8 Sc8-e7+ Kg8-h7
 11/14	00:00,547	 244k	447k	+9,88	Sf7-d6 b7-b6 Sd6-c8 a7-a5 Lf5-d7 b6-b5 Ld7xb5 Kf8-g8 Lb5-c4+ Kg8-h7 Sc8-e7
 12/14	00:00,747	 564k	755k	+10,35	Sf7-d6 b7-b6 Sd6-c8 Kf8-e8 Sc8xa7 Ke8-d8 Sa7-b5 Kd8-e8 Sb5-c7+ Ke8-f8 Sc7-d5 b6-b5
 13/16	00:01,183	 1.270k	1.074k	+25,01	Sf7-d6 b7-b6 Lf5-e6 a7-a5 Le6-d7 Kf8-g8 Sd6-c4 Kg8-h7 Sc4xb6 Kh7-g8 Sb6-c4 Sc4xa5
 14/17	00:01,592	 1.984k	1.246k	+25,01	Sf7-d6 b7-b6 Lf5-e6 a7-a5 Le6-d7 Kf8-g8 Sd6-c4 Kg8-h7 Sc4xb6 Kh7-g8 Sb6-c4 a5-a4 Ld7xa4 Kg8-h8
 15/18	00:07,787	 13.837k	1.777k	+25,05	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-e8 Sa5-c6 a7-a6 Lf5-e6 a6-a5 Sc6xa5 Ke8-d8 Le6-f7 Kd8-c7 Sa5-b3
 16/18	00:09,467	 17.188k	1.816k	+25,05	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-e8 Sa5-c6 a7-a6 Lf5-e6 a6-a5 Sc6xa5 Ke8-d8 Le6-f7 Kd8-c7 Sa5-c4 Kc7-d8
 17/20	00:12,381	 23.141k	1.869k	+25,05	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-e8 Sa5-c6 a7-a6 Lf5-e6 a6-a5 Sc6xa5 Ke8-d8 Le6-f7 Kd8-c7 Sa5-c4 Kc7-d8 Sc4-a3
 18/21	00:18,264	 35.336k	1.935k	+25,05	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-e8 Sa5-c6 a7-a6 Lf5-e6 a6-a5 Sc6xa5 Ke8-d8 Le6-g4 Kd8-e8 Lg4-f3 Ke8-d8 Kf6-f7 Kd8-c7
 19/22	00:28,010	 55.867k	1.994k	+25,06	Sf7-d6 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-a5 Kf8-e8 Sa5-c6 a7-a6 Lf5-e6 a6-a5 Sc6xa5 Ke8-d8 Sa5-b3 Kd8-c7 Kf6-e5 Kc7-b6 Le6-c4 Kb6-a7 Ke5-d6
 20/23	05:21,382	 580.529k	1.806k	+25,07	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7xb5 a5-a4 Lb5xa4 Kf8-g8 La4-b3+ Kg8-h7 Lb3-e6 Kh7-h6 Le6-g8 Kh6-h5 Kf6-f5 Kh5-h4 Kf5-f4 Kh4-h3 Sd6-f5 Kh3-h2
 21/24	05:58,695	 645.277k	1.799k	+25,07	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7xb5 a5-a4 Lb5xa4 Kf8-g8 La4-b3+ Kg8-h7 Lb3-e6 Kh7-h6 Le6-g8 Kh6-h5 Kf6-f5 Kh5-h4 Kf5-f4 Kh4-h3 Sd6-f5 Kh3-h2 Sf5-h4
 22/25	06:51,905	 737.690k	1.791k	+25,07	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7xb5 a5-a4 Lb5xa4 Kf8-g8 La4-b3+ Kg8-h7 Kf6-f5 Kh7-h6 Lb3-d5 Kh6-h5 Sd6-f7 Kh5-h4 Kf5-f4 Kh4-h3 Ld5-e6+ Kh3-h2 Kf4-f3 Kh2-g1

MadChess-3.2:

Code: Select all

 1/2	00:00,062	 46	741	+10,97	Sf7-e5
 2/3	00:00,186	 112	601	+10,56	Sf7-d6 b7-b6
 3/6	00:00,196	 358	2k	+10,81	Sf7-d6 b7-b6 Kf6-e5
 4/6	00:00,206	 949	5k	+10,03	Sf7-d6 a7-a5 Sd6xb7 a5-a4
 5/6	00:00,232	 1k	6k	+10,73	Sf7-d6 a7-a5 Sd6xb7 a5-a4 Sb7-d6
 6/8	00:00,250	 4k	17k	+9,52	Sf7-d6 a7-a5 Sd6xb7 a5-a4 Sb7-d6 a4-a3
 7/8	00:00,268	 7k	26k	+9,66	Sf7-d6 a7-a5 Sd6xb7 a5-a4 Sb7-d6 a4-a3 Kf6-e5
 8/12	00:00,365	 18k	50k	+9,70	Lf5-d7
 9/12	00:00,455	 34k	75k	+9,75	Sf7-e5 b7-b5 Se5-c6 Kf8-e8 Sc6xa7 b5-b4 Sa7-c6 b4-b3 Sc6-e5
 10/12	00:00,538	 46k	86k	+10,13	Sf7-e5 b7-b5 Se5-c6 a7-a6 Lf5-c8 a6-a5 Sc6xa5 b5-b4 Lc8-e6 Kf8-e8
 11/16	00:01,009	 148k	147k	+10,68	Sf7-d6 b7-b6 Lf5-c8 Kf8-g8 Lc8-e6+ Kg8-h7 Sd6-c8 b6-b5 Sc8xa7 b5-b4 Sa7-c6
 12/15	00:01,104	 168k	152k	+10,90	Sf7-d6 b7-b6 Lf5-c8 Kf8-g8 Lc8-e6+ Kg8-h7 Sd6-c8 a7-a5 Le6-f5+ Kh7-h6 Sc8xb6 Kh6-h5
 13/14	00:01,170	 193k	165k	+11,20	Sf7-d6 b7-b6 Lf5-c8 Kf8-g8 Lc8-e6+ Kg8-h7 Sd6-c8 a7-a5 Le6-f5+ Kh7-g8 Sc8xb6 Kg8-f8 Lf5-e4
 14/15	00:01,410	 316k	224k	+11,10	Sf7-d6 b7-b6 Lf5-c8 Kf8-g8 Lc8-e6+ Kg8-f8 Sd6-c8 a7-a5 Le6-d7 b6-b5 Ld7xb5 Kf8-g8 Sc8-d6 Kg8-f8
 15/18	00:01,528	 418k	274k	+196,91	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-d7 Kf8-g8 Sc5-b7 Kg8-h8 Sb7xa5
 16/16	00:01,557	 440k	282k	+196,91	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-d7 Kf8-g8 Sc5-b7 a5-a4 Ld7xa4 Kg8-h8
 17/18	00:01,601	 473k	295k	+196,91	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-d7 Kf8-g8 Sc5-b7 a5-a4 Ld7xa4 Kg8-h8 La4-d7
 18/18	00:01,718	 571k	333k	+196,92	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-d7 Kf8-g8 Sc5-b7 a5-a4 Ld7xa4 Kg8-h8 La4-d7 Kh8-g8
 19/20	00:01,803	 654k	363k	+196,92	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-d7 Kf8-g8 Sc5-b7 Kg8-h8 Sb7xa5 Kh8-g8 Sa5-c4 Kg8-h7 Sc4-a5
 20/21	00:02,013	 842k	418k	+196,93	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Sb6-a4 a6-a5 Sa4-c5 Ke8-f8 Lf5-e6 Kf8-e8 Le6-f7+ Ke8-d8 Sc5-b7+ Kd8-c7 Sb7xa5 Kc7-b6 Sa5-c4+ Kb6-a6
 21/22	00:02,265	 1.133k	500k	+196,94	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Lf5-d3 a6-a5 Sb6-c4 Ke8-f8 Sc4xa5 Kf8-g8 Sa5-c4 Kg8-h8 Sc4-d6 Kh8-g8 Sd6-f7 Kg8-f8 Ld3-h7 Kf8-e8 Lh7-c2
 22/23	00:02,642	 1.558k	590k	+196,94	Sf7-d6 b7-b6 Sd6-c8 a7-a6 Sc8xb6 Kf8-e8 Lf5-d3 a6-a5 Sb6-c4 Ke8-f8 Sc4xa5 Kf8-g8 Sa5-c4 Kg8-h8 Sc4-d6 Kh8-g8 Sd6-f7 Kg8-f8 Ld3-h7 Kf8-e8 Kf6-g7 Ke8-d7
 23/26	00:37,960	 36.875k	971k	+196,97	Sf7-d6 a7-a5 Lf5-d7 a5-a4 Ld7xa4 Kf8-g8 Sd6xb7 Kg8-h7 La4-b3 Kh7-h8 Lb3-c4
 24/26	00:43,803	 43.171k	986k	+196,97	Sf7-d6 a7-a5 Lf5-d7 a5-a4 Ld7xa4 Kf8-g8 Sd6xb7 Kg8-h7 La4-b3 Kh7-h8 Lb3-c4 Kh8-h7 Lc4-d3+ Kh7-h6 Ld3-e2 Kh6-h7 Kf6-g5 Kh7-h8 Sb7-a5 Kh8-g7 Le2-c4 Kg7-h7 Kg5-f6
 25/26	00:48,074	 48.104k	1.001k	+196,97	Sf7-d6 a7-a5 Lf5-d7 a5-a4 Ld7xa4 Kf8-g8 Sd6xb7 Kg8-h7 La4-b3 Kh7-h8 Lb3-c4 Kh8-h7 Lc4-d3+ Kh7-h6 Ld3-e2 Kh6-h7 Sb7-a5 Kh7-g8 Le2-c4+ Kg8-h8 Lc4-f7
 26/28	02:40,034	 140.889k	880k	+196,98	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7-e6 a5-a4 Le6-f7 a4-a3 Sd6xb5 a3-a2 Lf7xa2 Kf8-e8 Sb5-a3 Ke8-f8 La2-e6
 27/30	02:51,857	 153.144k	891k	+196,98	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7-e6 a5-a4 Le6-f7 a4-a3 Sd6xb5 a3-a2 Lf7xa2 Kf8-e8 Sb5-a3 Ke8-f8 La2-e6
 28/30	03:04,939	 166.567k	901k	+196,98	Sf7-d6 a7-a5 Lf5-d7 b7-b5 Ld7-e6 a5-a4 Le6-f7 a4-a3 Sd6xb5 a3-a2 Lf7xa2 Kf8-e8 Sb5-a3 Ke8-f8 La2-e6
 29/31	13:45,248	 743.977k	902k	+M9	Lf5-d7 b7-b5 Ld7xb5 a7-a5 Sf7-g5 a5-a4 Sg5-h7+ Kf8-g8 Kf6-g6 a4-a3 Lb5-c4+ Kg8-h8 Sh7-f8 a3-a2 Kg6-h6 a2-a1D Sf8-g6+
 30/30	55:00,722	 3.096.194k	938k	+M9	Lf5-d7 b7-b5 Ld7xb5 a7-a5 Sf7-g5 a5-a4 Sg5-h7+ Kf8-g8 Kf6-g6 Kg8-h8 Lb5-c4 a4-a3 Sh7-f8 a3-a2 Kg6-h6 a2-a1D Sf8-g6+

[Carlos777]

Congrats and thank you for the new release.

I am interested in the limit strenght mode. Is there a way I can install MadChess on my Android smartphone?

[mvanthoor]

The main feature in this release is a sophisticated limit-strength mode, including adjustments to chess knowledge, search speed, chance of erring or blundering, and severity of blunders. MadChess, in limit-strength mode, excludes moves it considers unreasonable (dumb moves even a chess novice wouldn’t play). I have extensively documented the settings and technical implementation of MadChess’ limit-strength mode in The MadChess UCI_LimitStrength Algorithm. I also provide a Limit-Strength FAQ.

Great. I'm sure going to save those as PDF's for future reference. I'm going to need that.

This likely is the last release of MadChess- at least for a long while. I plan to focus more on playing chess instead of coding chess. And I plan to move on to other (non-chess) programming projects. You may follow along on my general programming blog, ErikTheCoder. Nothing new there yet. But I intend to resume blogging there soon. I’ll keep blogging on MadChess.net also, focused as I said on playing the game, not coding it.

You may download x64 and x86 versions of MadChess 3.2 from the Downloads page. Install the appropriate version for your computer’s CPU. The x64 binary is the strongest version of the engine.

Enjoy!

Thanks, and good luck with your other projects. Your blog (especially the strength gains per feature) is what inspired me to have the SPRT testing page on my site with the results of every (part of a) feature. It also gave a good indication of expected gains.

[Chessqueen]

Congrats and thank you for the new release.

I am interested in the limit strenght mode. Is there a way I can install MadChess on my Android smartphone?

I decided to set the strength limit to 1200 and I just simply outplayed it with the Clemenz Opening 1.h3....

[pgn][Event "Computer chess game"] [Site "DESKTOP-4QNC0GS"] [Date "2024.02.01"] [Round "?"] [White "ChessQueen"] [Black "MadChess.Engine"] [Result "1-0"] [BlackElo "1200"] [ECO "A00"] [Opening "Clemenz (Mead-Basman-de Klerk-Welling) Opening"] [Time "23:53:18"] [WhiteElo "????"] [TimeControl "600+3"] [Termination "normal"] [PlyCount "56"] [WhiteType "human"] [BlackType "program"] 1. h3 c5 2. c3 d6 3. Nf3 b5 4. d4 Be6 5. dxc5 a6 6. cxd6 exd6 7. Ng5 h5 8. Bf4 Qb6 9. Qd3 h4 10. Nxe6 fxe6 11. Qg6+ Kd7 12. Nd2 Nc6 13. Nf3 Qc7 14. Bg5 Ne5 15. Nxe5+ dxe5 16. O-O-O+ Bd6 17. Qxg7+ Kc6 18. Qxh8 Re8 19. Qxh4 Ne7 20. Qg4 Nf5 21. e4 Ng7 22. Bf6 Bf8 23. Qg5 Qb7 24. Bd3 Kb6 25. Bxe5 Ka7 26. Qg6 Re7 27. Bd4+ Ka8 28. Qf6 Re8 29. Rhe1 Nh5 {Black resigns} *[/pgn]