Questionable positions in the Hard-Talkchess-2020 set

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Jouni
Posts: 2386
Joined: Wed Mar 08, 2006 7:15 pm

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Jouni » Fri Jan 22, 2021 8:09 am

There is 4 winning moves at least. Analysis by Stockfish 110121:

1. +- (5.27): 1.Qxd2 Ba6 2.Ng4 Rac8 3.Re1 Rfe8 4.Qg5 Kf8 5.Ne5 Rc7 6.Ng6+ Kg8 7.Nf4 Bd3 8.Nxd3 Qd8 9.Qg3 Qxf6 10.Qxc7 cxd4 11.Rf1 Qe7 12.Qxe7 Rxe7 13.cxd4 Rc7 14.Rc1 Rc4 15.Rxc4 dxc4 16.Nb4 b5 17.Nc6 a6 18.Kf1 Kh7 19.Ne5 f6 20.Nd7 Kg8 21.Nc5 Kf7 22.Nxa6 Kf8 23.Ke2 Ke7 24.Kd2 Kd6 25.Kc3 e5 26.dxe5+ fxe5 27.Nb4 Kc5 28.Nc2 g5
2. +- (4.74): 1.Ng4 Qe7 2.Qxd2 cxd4 3.Qg5 dxc3 4.bxc3 d4 5.Rdf1 Be4 6.cxd4 Bg6 7.Rxg6 Qxg5 8.Rxg5 Kh7 9.Rh5+ Kg6 10.Re5 Rad8 11.Re3 f6 12.Rxe6 Rxd4 13.Re7 Rfd8 14.Rxa7 b5 15.Kh2 R8d7 16.Ra5 Rd2 17.Rf3 b4 18.Nf2 b3 19.axb3 R2d5 20.Ra8 f5 21.Rg3+ Kh7 22.b4 f4 23.Rg4 g5 24.Ne4
3. +- (3.87): 1.Rxd2 Qd8 2.Rf4 Qg5 3.Rg4 Qh6 4.Qe1 f6 5.Ng6 Rfe8 6.Rd3 f5 7.Rgg3 e5 8.Nxe5 Rac8 9.Qf2 f4 10.Rg4 cxd4 11.cxd4 Rc1+ 12.Kh2 Ba6 13.Rf3 Rf1 14.Qc2 Rxf3 15.Nxf3 Bc8 16.Rg6 Qh5 17.Qc6 Rf8 18.Qd6 Rf5 19.Rg5 Qf7 20.Qb8 Qf8 21.Rxf5 Bxf5 22.Qxf4 Qf6 23.Kg3 Bb1 24.a3 Be4 25.h4 a5 26.Qxf6 gxf6 27.Kf4 Kh8 28.g4 Kg8 29.g5 fxg5+ 30.Nxg5
4. +- (2.00): 1.Qg4 cxd4 2.cxd4 Qc7 3.Rf3 Ba6 4.Rc3 Qe7 5.Rxd2 Qf6 6.Rf2 Qh6 7.Qg3 f5 8.Rf4 Rfc8 9.Re3 Bb5 10.Rh4 Qf6 11.Ng6 Kf7 12.Nf4 Bd7 13.Rh7 Qxd4 14.Kh2 Rh8 15.Rxh8 Rxh8 16.Ng6 Rg8 17.Ne5+ Ke7 18.Rd3 Qxb2 19.Rc3 g5 20.Rc7 f4 21.Qe1 g4 22.hxg4 Ke8 23.Nxd7 Rxg4 24.Qxe6+ Kd8 25.Qxg4
5. +/= (0.46): 1.Qe3 cxd4 2.cxd4 Rac8 3.Qxd2 Ba6 4.Re1 Qe7 5.Rf3 Bb5 6.Rg3 Rc7 7.Qf4 Be8 8.Nd3 f6 9.Qg4 Rc6 10.a3 Rf7 11.Nf4 f5 12.Qg5 Qf6 13.Kh2 Qxg5 14.Rxg5 Rf6 15.Nxd5 exd5 16.Rxe8+ Kf7 17.Rd8 g6 18.Rd7+ Kf8 19.h4 Rc2 20.h5 gxh5 21.Rxh5 Kg8 22.Rg5+ Kf8 23.Rxa7 f4 24.Rh5 Kg8 25.Ra8+ Kg7
Jouni

Vinvin
Posts: 4911
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Vinvin » Fri Jan 22, 2021 1:34 pm

Paloma wrote:
Fri Jan 22, 2021 3:23 am
Why has Nr.192 (.... bm Qxd2 Ng4; id "Hard-Talkchess-2020.192") 1.Ng4 as second solution?

192: Hard-Talkchess-2020.192
r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1

Analysis by Crystal 110920 Cry3.0:

1. +- (6.57): 1.Qxd2 Ba6 2.Ng4 Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qd6 8.Rf4 Bc4 9.Qh8+ Kf7 10.Qh7 cxd4
2. +- (3.95): 1.Rxd2 Qd8 2.Rf4 g5 3.Rf1 f6 4.Qh5 Qe8 5.Qh6 Qe7 6.Rdf2 Qg7 7.Rxf6 Qxh6 8.Rxh6 Rxf1+ 9.Kxf1 cxd4 10.cxd4 Ba6+
3. +- (3.46): 1.Ng4 cxd4 2.Rdf1 Qc5 3.Nh6+ Kh7 4.Qd3+ Kh8 5.Nxf7+ Kg8 6.b4 Ba6 7.Rh6 Rxf7 8.Qh7+ Kf8 9.Rxf7+ Kxf7 10.Qg6+ Kf8

3core @3.8GHz, depth 34
Jouni wrote:
Fri Jan 22, 2021 8:09 am
There is 4 winning moves at least. Analysis by Stockfish 110121:

1. +- (5.27): 1.Qxd2 Ba6 2.Ng4 Rac8 3.Re1 Rfe8 4.Qg5 Kf8 5.Ne5 Rc7 6.Ng6+ Kg8 7.Nf4 Bd3 8.Nxd3 Qd8 9.Qg3 Qxf6 10.Qxc7 cxd4 11.Rf1 Qe7 12.Qxe7 Rxe7 13.cxd4 Rc7 14.Rc1 Rc4 15.Rxc4 dxc4 16.Nb4 b5 17.Nc6 a6 18.Kf1 Kh7 19.Ne5 f6 20.Nd7 Kg8 21.Nc5 Kf7 22.Nxa6 Kf8 23.Ke2 Ke7 24.Kd2 Kd6 25.Kc3 e5 26.dxe5+ fxe5 27.Nb4 Kc5 28.Nc2 g5
2. +- (4.74): 1.Ng4 Qe7 2.Qxd2 cxd4 3.Qg5 dxc3 4.bxc3 d4 5.Rdf1 Be4 6.cxd4 Bg6 7.Rxg6 Qxg5 8.Rxg5 Kh7 9.Rh5+ Kg6 10.Re5 Rad8 11.Re3 f6 12.Rxe6 Rxd4 13.Re7 Rfd8 14.Rxa7 b5 15.Kh2 R8d7 16.Ra5 Rd2 17.Rf3 b4 18.Nf2 b3 19.axb3 R2d5 20.Ra8 f5 21.Rg3+ Kh7 22.b4 f4 23.Rg4 g5 24.Ne4
3. +- (3.87): 1.Rxd2 Qd8 2.Rf4 Qg5 3.Rg4 Qh6 4.Qe1 f6 5.Ng6 Rfe8 6.Rd3 f5 7.Rgg3 e5 8.Nxe5 Rac8 9.Qf2 f4 10.Rg4 cxd4 11.cxd4 Rc1+ 12.Kh2 Ba6 13.Rf3 Rf1 14.Qc2 Rxf3 15.Nxf3 Bc8 16.Rg6 Qh5 17.Qc6 Rf8 18.Qd6 Rf5 19.Rg5 Qf7 20.Qb8 Qf8 21.Rxf5 Bxf5 22.Qxf4 Qf6 23.Kg3 Bb1 24.a3 Be4 25.h4 a5 26.Qxf6 gxf6 27.Kf4 Kh8 28.g4 Kg8 29.g5 fxg5+ 30.Nxg5
4. +- (2.00): 1.Qg4 cxd4 2.cxd4 Qc7 3.Rf3 Ba6 4.Rc3 Qe7 5.Rxd2 Qf6 6.Rf2 Qh6 7.Qg3 f5 8.Rf4 Rfc8 9.Re3 Bb5 10.Rh4 Qf6 11.Ng6 Kf7 12.Nf4 Bd7 13.Rh7 Qxd4 14.Kh2 Rh8 15.Rxh8 Rxh8 16.Ng6 Rg8 17.Ne5+ Ke7 18.Rd3 Qxb2 19.Rc3 g5 20.Rc7 f4 21.Qe1 g4 22.hxg4 Ke8 23.Nxd7 Rxg4 24.Qxe6+ Kd8 25.Qxg4
5. +/= (0.46): 1.Qe3 cxd4 2.cxd4 Rac8 3.Qxd2 Ba6 4.Re1 Qe7 5.Rf3 Bb5 6.Rg3 Rc7 7.Qf4 Be8 8.Nd3 f6 9.Qg4 Rc6 10.a3 Rf7 11.Nf4 f5 12.Qg5 Qf6 13.Kh2 Qxg5 14.Rxg5 Rf6 15.Nxd5 exd5 16.Rxe8+ Kf7 17.Rd8 g6 18.Rd7+ Kf8 19.h4 Rc2 20.h5 gxh5 21.Rxh5 Kg8 22.Rg5+ Kf8 23.Rxa7 f4 24.Rh5 Kg8 25.Ra8+ Kg7

It seems that now, SF and mods find a clear win after Rxd2. That was not the case 1 year ago.
I will remove this one, thanks !

Eval after Rxd2 :

CF_EXT_x64_281220_ELTO_SSE41_popcnt:
...
41/63 06:57 2 248 092 805 5 379 357 +4,71 1. ... Qe7 2.Ng4 cxd4 3.Nh6+ Kh7 4.Qh5 Qxf6 5.Ng4+ Qh6 6.Nxh6 gxh6 7.cxd4 Ba6 8.Qf3 Bc4 9.Qa3 a5 10.Rf2 Rae8 11.Qg3 Bxa2 12.Qd3+ f5 13.b3 Bb1...
41/60 06:57 2 248 092 805 5 379 357 +4,02 1. ... Qd8 2.Rf4 Qg5 3.Rg4 Qh6 4.Qe1 f6 5.Ng6 Rfe8 6.Rd3 f5 7.Rgg3 e5 8.Nxe5 Re6 9.h4 f4 10.Rg5 Rf8 11.Qf2 Rd6 12.dxc5 bxc5 13.Qxc5 Re6 14.Qc7 Bc6 ...

Jouni
Posts: 2386
Joined: Wed Mar 08, 2006 7:15 pm

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Jouni » Sun Jan 24, 2021 5:59 pm

Crystal 3.1 is excellent in this remaining 116 positions suite. It solves 83 positions with 1 minute limit, when using 6 cores. This is one really stunning solution:


Analysis by Crystal 140121:

...
1.Qxe5 fxe5 2.Rf1 Rc7 3.Bb5 Qd8 4.Ba4 Re7 5.Bd1 Qe8 6.Bb3 Qd8 7.Bd5 b5 8.Bc6 Qb6+ 9.Kh1 Qb8 10.Bxb5 Qd8 11.Kg1 Qc8 12.Bc6 Qb8 13.b3 Qc8
+/= (0.49) Depth: 20/41 00:00:02 20602kN
1.Qxe5
+/- (0.72 ++) Depth: 21/49 00:00:03 28911kN
1.Qxe5 fxe5 2.Rf1 Rc7 3.Bb5 Qe7 4.Ba4 Rc4 5.Bb3 b5 6.a3 a6 7.a4 Qa7+ 8.Kh1 Qa8 9.h3 Qe8 10.Kg1 Qe7 11.Kh2 Qe8 12.Ba2 Qe7 13.Rf3 Qe8 14.Rf2 Qe7 15.b4 Qe8 16.Bb3 Qd8 17.axb5
+/- (0.73) Depth: 21/49 00:00:03 31408kN
1.Qxe5
+/- (1.01 ++) Depth: 22/36 00:00:03 33218kN
1.Qxe5
+/- (1.06 ++) Depth: 22/36 00:00:03 33948kN
1.Qxe5
+/- (1.12 ++) Depth: 22/36 00:00:03 35285kN
1.Qxe5
+/- (1.21 ++) Depth: 22/36 00:00:04 36331kN
1.Qxe5
+/- (1.33 ++) Depth: 22/38 00:00:04 37970kN
1.Qxe5
+- (2.01 ++) Depth: 22/47 00:00:04 39914kN
1.Qxe5
+- (2.45 ++) Depth: 22/48 00:00:04 42220kN
1.Qxe5
+- (3.01 ++) Depth: 22/56 00:00:05 47081kN
1.Qxe5 fxe5 2.Rf1 Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 Re8 6.c4 a6 7.Kh1 Rc8 8.Kg2 Re8 9.Rf6 Rb8 10.Rf2 Re8 11.b4 Ra8 12.Rf6 Rb8 13.Kh3 Rc8 14.Kg3 Re8 15.c5 bxc5 16.bxc5 a5
+- (3.37) Depth: 22/56 00:00:05 48130kN
1.Qxe5
+- (3.41 ++) Depth: 23/51 00:00:05 53634kN
1.Qxe5
+- (3.46 ++) Depth: 23/51 00:00:05 55306kN
1.Qxe5
+- (3.52 ++) Depth: 23/51 00:00:06 56390kN
1.Qxe5
+- (3.61 ++) Depth: 23/51 00:00:06 58842kN
1.Qxe5 fxe5 2.Rf1 Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 Ra8 6.b4 a6 7.c4 Re8 8.Kg2 Rb8 9.Rf6 a5 10.bxa5 bxa5 11.Kg3 Rb3+ 12.Kh4 Rb8 13.Kg4 Ra8 14.Kg3 Rb8 15.c5 Rb3+ 16.Kh4 Rb8 17.c6 a4 18.Kg4 Ra8 19.Kf3 a3 20.bxa3 Rxa3+ 21.Kg4 Ra8 22.c7 Rc8
+- (3.59) Depth: 23/51 00:00:06 59171kN
1.Qxe5
+- (3.84 ++) Depth: 24/49 00:00:06 63090kN
1.Qxe5
+- (3.88 ++) Depth: 24/49 00:00:06 63622kN
1.Qxe5
+- (3.95 ++) Depth: 24/49 00:00:06 65425kN
1.Qxe5
+- (4.03 ++) Depth: 24/49 00:00:07 68395kN
1.Qxe5 fxe5 2.Rf1 Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 Ra8 6.b4 b5 7.Kg2 Rd8 8.Kg3 Rb8 9.Kh4 Rc8 10.Kg5 Ra8 11.Rf2 Rc8 12.Kf6 Rd8 13.Kxe5 Rb8 14.Rf1 g5 15.Rf6 Ra8 16.Kf5
+- (4.06) Depth: 24/49 00:00:07 71402kN, tb=12
1.Qxe5
+- (4.36 ++) Depth: 25/41 00:00:08 76081kN, tb=12
1.Qxe5
+- (4.40 ++) Depth: 25/41 00:00:08 76436kN, tb=12
1.Qxe5
+- (4.46 ++) Depth: 25/41 00:00:08 79495kN, tb=12
1.Qxe5
+- (4.55 ++) Depth: 25/41 00:00:08 80237kN, tb=12
1.Qxe5 fxe5 2.Rf1 Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 Rd8 6.c4 a5 7.Kg2 Ra8 8.Kg3 Rb8 9.Kg4 Ra8 10.Kg5 Rc8 11.Kf6 Rf8+ 12.Bxf8 Kxf8 13.Rd1 Ke8 14.Rd6 Rf8+ 15.Ke6 Rf2 16.Rxb6 Kd8 17.h4 Rxb2 18.Rb5 Kc7 19.Kxe5 Kc6 20.Rxa5 Rxb3 21.Ra7
+- (4.46) Depth: 25/42 00:00:08 82710kN, tb=12
1.Qxe5
+- (4.63 ++) Depth: 26/39 00:00:08 84137kN, tb=12
1.Qxe5
+- (4.68 ++) Depth: 26/39 00:00:08 84410kN, tb=12
1.Qxe5
+- (4.74 ++) Depth: 26/39 00:00:09 86798kN, tb=16
1.Qxe5
+- (4.83 ++) Depth: 26/44 00:00:09 87822kN, tb=16
1.Qxe5
+- (4.95 ++) Depth: 26/44 00:00:10 99479kN, tb=16

10 years ago this was very hard and took hours of time and special settings :!: .
Jouni

Vinvin
Posts: 4911
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Vinvin » Mon Feb 08, 2021 12:28 am

Another refuted solution for 73) .. e6-e5
1... Bg7 seems also good :

Code: Select all

FEN: 4bbk1/3nq2r/pr2p3/Np1p1p1p/1PpP1Pp1/2P1P1P1/PQ1NB1PR/2K4R b - - 0 1
Crystal3.1-sse4-popcnt:
...
 26/47	01:56	 581 639 105	4 978 380	-2,71	1. ... Qf6 2.Rd1 Bd6 3.Rhh1 Rb8 4.Rdg1 Nb6 5.Bd1 Bc7 6.Nb1 Na4 7.Qa1 Bxa5 8.bxa5 Rhb7 9.Bc2 Qd8 10.a3 Qxa5 11.Kd2 Nb6 12.Re1 Nd7 13.Ke2 Nf6 14.Nd2 Qb6 15.Rb1 a5 16.Rhe1
 27/42	01:56	 581 639 105	4 978 380	-3,81	1. ... Bg7 2.Re1 e5 3.Rhh1 Re6 4.fxe5 Nxe5 5.dxe5 Bxe5 6.Rd1 Qf6 7.Nb1 Bxg3 8.Rxd5 Rhe7 9.Qc2 Rxe3 10.Bd1 Be5 11.Kb2 Kg7 12.Qd2 f4 13.Rf1 Bf7 14.Rd8 Bg6 15.Qxe3 fxe3 16.Rxf6 Bxf6 17.Rd6
 27/54	01:56	 581 639 105	4 978 380	-4,08	1. ... e5 2.dxe5 Nxe5 3.fxe5 Qxe5 4.Nf3 gxf3 5.Bxf3 Qxe3+ 6.Qd2 d4 7.Re1 Bh6 8.Rxe3 Bxe3 9.cxd4 Re7 10.Kc2 Bxd2 11.Kxd2 Rd6 12.Rh4 Bf7 13.Nb7 Rg6 14.Rf4 Rxg3 15.Nd6 Bg6 16.Nxf5 Bxf5 17.Rxf5

Vinvin
Posts: 4911
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Vinvin » Mon Feb 08, 2021 1:54 am

One more : 25) e4-e5
1.Rad1 seems as good.

Code: Select all

FEN: 1rb1r1k1/2qn1pbp/pp1p2p1/2nP4/P1p1PP2/2N1BQNP/1PB3P1/R4R1K w - - 0 1

Crystal3.1-sse4-popcnt:
...
 27/57	00:21	 108 471 774	5 078 266	+2,07	1.e5 Qd8 2.Rad1 dxe5 3.f5 e4 4.Ncxe4 Ne5 5.Qf4 Nxe4 6.Bxe4 Qd6 7.h4 b5 8.Bd4 bxa4 9.Bc2 Bb7 10.h5 Qxd5 11.Be4 Qd6 12.Ba7 g5 13.Qxg5 Qf6 14.Qxf6 Bxf6 15.Bxb8 Rxb8 16.Bxb7 Rxb7 17.Ne4 Ng4 18.Nxf6+ Nxf6
 27/49	00:21	 108 471 774	5 078 266	+2,11	1.Rad1 Qd8 2.e5 dxe5 3.f5 e4 4.Ncxe4 Ne5 5.Qf4 Nxe4 6.Bxe4 Qd6 7.Bd4 Bb7 8.Bf3 Rbd8 9.Ne4 Qf8 10.Bxb6 Nd3 11.Qh4 Rxd5 12.Ng5 h6 13.fxg6 Rxg5 14.Bxb7 Rxg6 15.Bd5 Kh8 16.Bd4 Bxd4 17.Qxd4+ Qg7 18.Qxg7+ Rxg7 19.Bxf7 Rc8 20.b3 cxb3 21.Bxb3 Rd7 22.Kh2 Rc3 23.Be6 Rd6 24.Bf5

Vinvin
Posts: 4911
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Questionable positions in the Hard-Talkchess-2020 set

Post by Vinvin » Fri Feb 12, 2021 12:41 am

The 114 remaining positions.
The sheet of results updated : https://www.dropbox.com/s/p9wh7iahnidpm ... s.ods?dl=0

Code: Select all

1B1K1k2/4N2p/3pP1pP/6p1/p7/3N2b1/2r2p2/8 w - - bm Nc6; id "Hard-Talkchess-2020.001" ;
1B1r4/rp2npkp/2b1pbp1/1qp5/nPN1R3/1P1P1QP1/2P2PBP/5R1K w - - bm Qxf6+; id "Hard-Talkchess-2020.002" ;
1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - bm Nc6; id "Hard-Talkchess-2020.003" ;
1k6/3p4/1B6/4Pp1p/1p5R/1p4p1/pP3n2/K6n w - - bm Rxh1; id "Hard-Talkchess-2020.007" ;
1nb3rr/2pp3p/p1k2P2/n1q1PN2/P1pR3N/b4PBp/1R2P3/1KQ5 w - - bm Rd6+; id "Hard-Talkchess-2020.008" ;
1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6; id "Hard-Talkchess-2020.010" ;
1r1q1rk1/1p2b2p/pN6/P1pP1bp1/5p2/2B2Q2/1P4PP/R4RK1 w - - bm g4; id "Hard-Talkchess-2020.011" ;
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7+; id "Hard-Talkchess-2020.012" ;
1r2kb1r/p5p1/1np1p1N1/3pPnB1/1p1P2B1/qP6/2PQ1P1P/1K1R3R b k - bm Nc4; id "Hard-Talkchess-2020.013" ;
1r3r2/4bpkp/1qb1p1p1/3pP1P1/p1pP1Q2/PpP2N1R/1Pn1B2P/3RB2K w - - bm Qf6+; id "Hard-Talkchess-2020.014" ;
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - bm Bxh7+; id "Hard-Talkchess-2020.016" ;
1r3rk1/5p1p/p2pb1p1/3Np1P1/2pRPR2/qP2Q1N1/P1PK3P/8 w - - bm Nf5; id "Hard-Talkchess-2020.019" ;
1r4k1/pb3p1p/r1p1p1p1/2p1P3/P1P2P2/1PB5/2K3PP/5R2 w - - bm a5; id "Hard-Talkchess-2020.020" ;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - bm Rxb3+; id "Hard-Talkchess-2020.021" ;
1rb1qrk1/2b2pp1/p3pBn1/3pP1Pp/1ppP4/2P1QN2/PP3P1P/R2BR1K1 w - - bm Nh4; id "Hard-Talkchess-2020.023" ;
1rbq1r1k/7p/2np2p1/p2N1p2/R1B1PP1b/1PP1N3/8/3Q1K1R w - - bm Ra2; id "Hard-Talkchess-2020.028" ;
1rbq1rk1/1p2ppbn/p2p2p1/P1pP4/4P3/2PB1N2/2P3PP/R1B1QRK1 w - - bm e5; id "Hard-Talkchess-2020.029" ;
2R5/k1p1p1K1/P1p1Pp2/5P2/7P/pB6/2p5/2r5 w - - bm Rxc7+; id "Hard-Talkchess-2020.031" ;
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; id "Hard-Talkchess-2020.034" ;
2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - bm Qxg5; id "Hard-Talkchess-2020.035" ;
2bk2r1/5q2/1p2pP1Q/pP1pP1P1/P2P4/8/2RK4/8 w - - bm Kc1; id "Hard-Talkchess-2020.036" ;
2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - - bm Nc3; id "Hard-Talkchess-2020.038" ;
2k2Br1/p6b/Pq1r4/1p2p1b1/1Ppp2p1/Q1P3N1/5RPP/R3N1K1 b - - bm Rf6; id "Hard-Talkchess-2020.039" ;
2q2r1k/p1p1b1pp/br1p1n2/2p1N1BP/Q1P1P3/8/PP1N1PP1/2KR3R w - - bm Ng6+; id "Hard-Talkchess-2020.043" ;
2r2bk1/pNq3p1/2Pp3p/1p1Prp2/1P2p1P1/6Q1/P4P1P/2RR2K1 w - - bm Qxe5; id "Hard-Talkchess-2020.046" ;
2r2r1k/qb3p1p/p2p1Np1/np1Pp1P1/2P5/3RP2P/5R2/4Q1K1 w - - bm Rf4; id "Hard-Talkchess-2020.047" ;
2r2rk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PPK/8 w - - bm Kg3; id "Hard-Talkchess-2020.049" ;
2r2rk1/2q2p1p/p1p1nPpQ/3p4/4p1B1/8/PPP3PP/R4R1K w - - bm Rf5; id "Hard-Talkchess-2020.050" ;
2r4r/3n1pk1/pq1p1bp1/3B4/1p2P1N1/7P/PP1Q1PK1/3RR3 w - - bm Bxf7; id "Hard-Talkchess-2020.052" ;
2r5/prkpR1p1/2p1ppK1/P1p1N1B1/P1P1P3/8/8/8 w - - bm Bf4; id "Hard-Talkchess-2020.053" ;
3B4/1r2p3/r2p1p2/bkp1P1p1/1p1P1PPp/p1P1K2P/PPB5/8 w - - bm Ba4+; id "Hard-Talkchess-2020.054" ;
3b2n1/1q3p1k/6pp/np2N3/2bBPN2/1pP4P/4QPP1/1B4K1 w - - bm Nexg6; id "Hard-Talkchess-2020.056" ;
3k4/4pp2/n2n4/5BN1/3N4/b7/4K3/8 w - - bm Nxf7+; id "Hard-Talkchess-2020.058" ;
3kB3/5K2/7p/3p4/3pn3/4NN2/8/1b4B1 w - - bm Nf5; id "Hard-Talkchess-2020.059" ;
3q1r1k/6rp/3p4/P2Pbp1Q/N3Pp1n/2P5/P1B2RPP/R6K b - - bm f3; id "Hard-Talkchess-2020.061" ;
3rqbk1/2p3p1/b6p/Q1p5/2N1PP2/1P1P2P1/2P4P/5R1K b - - bm Bc8; id "Hard-Talkchess-2020.065" ;
4B3/1Pb4p/8/4p1k1/3p1p2/5K2/2P5/8 b - - bm e4+; id "Hard-Talkchess-2020.066" ;
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "Hard-Talkchess-2020.067" ;
4K2k/1pQp3p/1R4p1/1P4P1/8/3P3P/1q3r2/8 w - - bm Qd8; id "Hard-Talkchess-2020.068" ;
4R3/P7/2bB2p1/r3pk2/2p2p1P/2P2P1K/6P1/8 w - - bm Rxe5+; id "Hard-Talkchess-2020.069" ;
4b1k1/P4pPp/1R3P1P/2r5/8/1P6/1K6/8 w - - bm a8=B; id "Hard-Talkchess-2020.070" ;
4b3/7p/4k3/B4pPP/5K2/P4P2/8/8 w - - bm g6; id "Hard-Talkchess-2020.072" ;
4k1br/1K1p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 w - - bm Kc8; id "Hard-Talkchess-2020.074" ;
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5; id "Hard-Talkchess-2020.078" ;
4r1rk/p3qpp1/1pnp1n1p/5P2/P1PPP3/4Q2P/2BB2R1/6RK w - - bm Rxg7; id "Hard-Talkchess-2020.081" ;
5k2/8/pppppppp/8/PPPPPPPP/8/8/5K2 w - - bm d5; id "Hard-Talkchess-2020.083" ;
5nr1/2Pp2pk/3Pp1p1/4P1P1/6P1/5K2/8/7n w - - bm c8=N; id "Hard-Talkchess-2020.087" ;
5rk1/pp3p1p/7b/2pR4/8/2P4P/P1PNr1P1/2K4R b - - bm Rxd2; id "Hard-Talkchess-2020.089" ;
6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - bm Bf8+; id "Hard-Talkchess-2020.090" ;
6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - bm Bxc5+; id "Hard-Talkchess-2020.091" ;
6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - bm Ncxe7+; id "Hard-Talkchess-2020.093" ;
6k1/8/1pK4p/bPp5/8/1P6/P1B2P2/8 w - - bm b4; id "Hard-Talkchess-2020.094" ;
6k1/p7/8/4B3/Pp3p1P/qP5P/P1Rb2K1/8 w - - bm Kf3; id "Hard-Talkchess-2020.095" ;
6k1/ppn2p2/8/2P2P1p/1P2K3/2N5/P7/8 w - - bm Nd5; id "Hard-Talkchess-2020.096" ;
6r1/6r1/2p1k1pp/p1pbP2q/Pp1p1PpP/1P1P2NR/1KPQ3R/8 b - - bm Qf5; id "Hard-Talkchess-2020.097" ;
7k/4PBNp/7P/2p5/2P5/2rq2Pp/1P3P1K/8 b - - bm Qxg3+; id "Hard-Talkchess-2020.099" ;
7k/pp2Np1p/2p2P1N/5pP1/7K/P4n2/1q3Q2/5n2 w - - bm Kh5; id "Hard-Talkchess-2020.101" ;
8/1B3b1p/7P/p2p4/P2pp1kp/Q7/1N1Pq2P/7K w - - bm Qh3+; id "Hard-Talkchess-2020.103" ;
8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - bm Nc8; id "Hard-Talkchess-2020.105" ;
8/2N4r/1p3pkp/8/5K1p/2P4N/P3Bn2/8 w - - bm Bh5+; id "Hard-Talkchess-2020.108" ;
8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - bm Be2+; id "Hard-Talkchess-2020.109" ;
8/2pN1k2/p4p1p/Pn1R4/3b4/6Pp/1P3K1P/8 w - - bm Ke1; id "Hard-Talkchess-2020.110" ;
8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - bm Nf6+; id "Hard-Talkchess-2020.113" ;
8/3ppp1p/3P4/4N3/8/3n1pKp/8/7k w - - bm Nxd3; id "Hard-Talkchess-2020.114" ;
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "Hard-Talkchess-2020.116" ;
8/4nk2/1p3p2/2rp2pp/1P1R1N1P/6P1/3KPP2/8 b - - am Rb5?; id "Hard-Talkchess-2020.117" ;
8/5p2/N1p3p1/3pP1P1/7P/2kP4/Pb6/7K w - - bm h5; id "Hard-Talkchess-2020.119" ;
8/6pp/1K6/N5P1/3N4/8/npn1P3/k7 w - - bm Nab3+; id "Hard-Talkchess-2020.121" ;
8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - bm Bh3; id "Hard-Talkchess-2020.122" ;
8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - bm Ng2; id "Hard-Talkchess-2020.125" ;
8/bp4Pk/4KB2/R6p/2pNp1P1/p7/3p1Pnq/2r5 w - - bm Nc6; id "Hard-Talkchess-2020.126" ;
8/p3N3/1n3N2/2n3pP/pkP5/8/3P4/K7 b - - bm Nxc4; id "Hard-Talkchess-2020.127" ;
8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - bm Ba5+; id "Hard-Talkchess-2020.129" ;
N7/8/2KQ2rp/6k1/3p3p/2p4P/4PP2/5N2 w - - bm f4+; id "Hard-Talkchess-2020.130" ;
Nq3n1k/8/P1p2Npp/2Kp3R/pp6/n3p3/8/4Q3 w - - bm Nc7; id "Hard-Talkchess-2020.131" ;
br1r2k1/5pp1/R6p/2pN4/P1P1q3/2P1p1P1/P3P2P/3RQ1K1 b - - bm Qxc4; id "Hard-Talkchess-2020.132" ;
k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - bm Bf3+; id "Hard-Talkchess-2020.133" ;
n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - bm Bc7; id "Hard-Talkchess-2020.135" ;
q7/7R/k7/1p6/1p6/1P2B3/7K/8 w - - bm Bd4; id "Hard-Talkchess-2020.140" ;
r1b1qk1r/pn3pp1/1p2p3/3pP1Bp/1bPN4/4Q1R1/P2N1PP1/R5K1 w - - bm Bf6; id "Hard-Talkchess-2020.144" ;
r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/8/PPP1QPP1/2KR3R w - - bm Rd8; id "Hard-Talkchess-2020.146" ;
r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/P7/1PP1QPP1/2KR3R w - - bm Rd8; id "Hard-Talkchess-2020.147" ;
r1b2rk1/pp3ppp/1n2p3/3pP3/2P2B2/b1PB1qP1/P1Q1NP1P/1K1R3R w - - bm Nd4; id "Hard-Talkchess-2020.153" ;
r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - bm Bg6; id "Hard-Talkchess-2020.155" ;
r1b3k1/ppppn1pp/4n1q1/8/5P2/2N1B3/PPP3QP/3R1RK1 w - - bm f5; id "Hard-Talkchess-2020.156" ;
r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - bm Nb5; id "Hard-Talkchess-2020.158" ;
r1bq1rk1/1p1nbppp/p3p3/2ppP3/5B1P/2PBP3/PP1N1PP1/R2QK2R w - - bm Bxh7+; id "Hard-Talkchess-2020.159" ;
r1bq1rk1/pp2b2p/2p1pppQ/8/1n1PN2P/3B1N2/PPP2PP1/2KR3R w - - bm Neg5; id "Hard-Talkchess-2020.160" ;
r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - am Bxa3; id "Hard-Talkchess-2020.164" ;
r1n2N1k/2n2K1p/3pp3/5Pp1/b5R1/8/1PPP4/8 w - - bm Ng6+; id "Hard-Talkchess-2020.166" ;
r1qn1rk1/p1pp1ppp/1p2p2b/1P2P3/P7/R2B1N2/1P4PP/3Q1R1K w - - bm Bxh7+; id "Hard-Talkchess-2020.169" ;
r2q1r2/1b2bpkp/n3p1p1/2ppP1P1/p6R/1PN1BQR1/NPP2P1P/4K3 w - - bm Qf6+; id "Hard-Talkchess-2020.170" ;
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; id "Hard-Talkchess-2020.171" ;
r2qrbk1/1b3p2/3p2pB/1p1P1N2/1np1P3/5NRP/1P3PP1/1B1Qn1K1 w - - bm N3h4; id "Hard-Talkchess-2020.177" ;
r2r2k1/pqp1bppp/1pn1pn2/8/2NP1B2/2N1P1P1/PPQ2P1P/R4RK1 b - - bm Rxd4; id "Hard-Talkchess-2020.179" ;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p5/2N3P1/PP3P1P/3RKB1b w - - bm h4; id "Hard-Talkchess-2020.181" ;
r3r1k1/1b1n1pbp/pq1p2p1/1pp1P3/3P1B2/nP1B1NNP/P4PP1/R2QR1K1 w - - bm Nh5; id "Hard-Talkchess-2020.182" ;
r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - bm Ng4; id "Hard-Talkchess-2020.183" ;
r3r1k1/pp1q1p2/2p2npb/PPPp1bnp/3PpN2/2N1P1PP/1R1B1PBK/3Q1R2 b - - bm Bg4; id "Hard-Talkchess-2020.184" ;
r3r1k1/pp1q1p2/2p2npb/PPPp4/3Pp3/2NNPpP1/1R1B1P1K/3Q3R b - - bm Kg7; id "Hard-Talkchess-2020.185" ;
r3r2k/1pq2pp1/4b2p/3pP3/p1nB3P/P2B1RQ1/1PP3P1/3R3K w - - bm Rf6; id "Hard-Talkchess-2020.186" ;
r4rk1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B3/PPP1QP1P/2KR2R1 w - - bm Qh5; id "Hard-Talkchess-2020.190" ;
r4rk1/4bppp/bq2p3/npnpP3/p2B1P2/P1PB1N2/1P2QNPP/R4RK1 w - - bm Bxh7+; id "Hard-Talkchess-2020.191" ;
r5k1/6b1/2Nq4/2pP1p2/p1P1pPr1/Pp6/3R2PQ/1K3R2 b - - bm e3; id "Hard-Talkchess-2020.194" ;
r5k1/p1pb2bp/3p3r/P1pPp1p1/2B1Pq2/1R2QPp1/1P4PP/5RBK b - - bm Rxh2+; id "Hard-Talkchess-2020.195" ;
r5rk/1bq1bpp1/1p1ppn1p/pP5P/2P1P3/P1N2P2/1B1Q1P2/1K1R1BR1 w - - bm Nd5; id "Hard-Talkchess-2020.196" ;
r7/1QP1N1Kp/pn2P1b1/Nnk2p2/7p/p4BP1/1rPPp2q/8 w - - bm Nd5; id "Hard-Talkchess-2020.198" ;
r7/1q1r1p1k/3p1Qpp/pbpP4/1nB1P1P1/1P3NBP/5P1K/4R3 w - - bm Bf4; id "Hard-Talkchess-2020.200" ;
rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - bm g3; id "Hard-Talkchess-2020.203" ;
rnb2rk1/1pq1bppp/p3p3/2npP1P1/3N1P2/2NBB3/PPP4P/R2QK2R w KQ - bm Bxh7+; id "Hard-Talkchess-2020.208" ;
rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - bm Bd2; id "Hard-Talkchess-2020.209" ;
rnbq3r/pppp4/3b1pkp/5p2/2BP4/4P3/PPP2PPP/RN1QK2R w KQ - bm Qh5+; id "Hard-Talkchess-2020.210" ;
rnbqk2r/p4p2/2p1p3/1p2N1pp/PbpPn2P/2N1P1B1/1P3PP1/R2QKB1R w KQkq - bm Qf3; id "Hard-Talkchess-2020.211" ;
rqn2rk1/1p2ppb1/p1b3pp/2R1P1N1/8/4BB1Q/3R1PPP/6K1 w - - bm Nxf7; id "Hard-Talkchess-2020.213" ;

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