Fairly difficult EG puzzle

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acase
Posts: 983
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Fairly difficult EG puzzle

Post by acase »

Nordlandia wrote: ↑Sat Mar 28, 2020 3:51 pm M. Garcia & Peter Krug | Commendation

[d]2r2krb/1qp2p2/2NPpN2/1P5B/p2Bp2p/1p5b/7p/R3K2Q w Q - 0 0

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r2krb/1qp2p2/2NPpN2/1P5B/p2Bp2p/1p5b/7p/R3K2Q w Q - 0 0"]
[PlyCount "25"]

{[#]} 1. Nh7+ Ke8 2. Bg7 Bxg7 3. d7+ Kxd7 4. O-O-O+ Ke8 5. Rd7 Bh6+ 6. Kb2 Bg7+
7. Ka3 Bf8+ 8. Nxf8 Qxb5 9. Re7+ Kxf8 10. Rxf7+ Ke8 11. Qd1 Qxc6 12. Rxc7+ Kf8
13. Qd4 *
[/pgn]
Plain old Stockfish development version finds the key move rather quickly in slightly less than 40 seconds:

FEN: 2r2krb/1qp2p2/2NPpN2/1P5B/p2Bp2p/1p5b/7p/R3K2Q w Q - 0 1

Code: Select all

Stockfish_20040215_x64_bmi2:
 1/1	00:00	 2k	601k	+10.88	1.d6-d7
 2/4	00:00	 6k	2,002k	+1.85	1.d6-d7 Bh8xf6 2.d7xc8Q+ Qb7xc8
 3/5	00:00	 11k	3,521k	+0.53	1.Nf6-d7+ Kf8-e8 2.Bd4xh8 Ke8xd7 3.Nc6-e5+ Kd7-d8
 4/6	00:00	 13k	4,179k	+1.48	1.Nf6-d7+ Kf8-e8 2.Bd4xh8 Rg8xh8
 5/8	00:00	 61k	12,283k	-2.83	1.Qh1xh2 Bh8xf6 2.Bd4xf6 Qb7xb5 3.d6-d7
 6/9	00:00	 66k	13,267k	+1.08	1.Nf6-d7+ Kf8-e8
 7/12	00:00	 69k	13,815k	+1.39	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2
 8/21	00:00	 124k	17,699k	+0.96	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-e2
 9/17	00:00	 160k	19,986k	+1.33	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1
 10/17	00:00	 171k	18,957k	+2.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-d7 5.O-O-O Rg8-g1 6.Qh1xh2
 11/23	00:00	 242k	22,016k	+1.49	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Qb7xc6 3.b5xc6 c7xd6 4.Qh1xh2 Bh8xd4 5.Qh2xh3 Ke8-e7 6.Ra1xa4 d6xc5 7.Qh3xb3 Ke7-f6 8.Ra4-a7
 12/23	00:00	 282k	21,715k	+1.97	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Qb7xc6 3.b5xc6 Bh8xd4 4.d6-d7+ Ke8-e7 5.d7xc8Q Rg8xc8 6.O-O-O Bd4xc5 7.Qh1xh2
 13/25	00:00	 327k	23,343k	+2.82	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Qb7xc6 3.b5xc6 c7xd6 4.Qh1xh2 Bh8xd4 5.Qh2xh3 Ke8-e7 6.Bh5xf7 Rg8-g1+ 7.Ke1-d2 Rg1xa1
 14/31	00:00	 1,161k	26,996k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 15/17	00:00	 1,225k	27,223k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 16/17	00:00	 1,396k	27,374k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 17/17	00:00	 1,640k	27,331k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 18/17	00:00	 2,373k	27,592k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 19/17	00:00	 2,927k	27,617k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 20/17	00:00	 5,085k	27,790k	 0.00	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 Bh8xd4 3.d6-d7+ Ke8-f8 4.Nc5xb7 Rg8-g1+ 5.Ke1-d2 Rc8-a8 6.Qh1xh2 Rg1xa1 7.Qh2xc7 Ra1-a2+ 8.Kd2-d1 Ra2-a1+
 21/47	00:00	 20,622k	27,943k	-1.42	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Bh5-g6 Be3-g5 12.Rh4-h8+ Kf8-g7 13.Rh8-h2 Kg7xg6 14.Rh2xg2 Kg6-h5 15.Rg2-g1 Bg5-e3 16.Rg1-a1 Be3-c5 17.Nd6-e8 Rc7-b7 18.Ra1xa4 Kh5-g4 19.Ne8-f6+ Kg4-f3 20.Kb2xb3 Rb7xb5+ 21.Kb3-c4
 22/45	00:00	 22,219k	27,913k	-0.81	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.O-O-O Rg8-g2 5.Rd1xd4 Rc8-a8 6.Nc6-a5 Rg2-g1+ 7.Rd4-d1 Ra8-c8+ 8.Na5-c6 Rg1xh1 9.Rd1xh1 Ke8-d7 10.Nb7-a5 f7-f5 11.Rh1xh2 Bh3-f1 12.Kc1-b2 Bf1xb5 13.Nc6-d4 Bb5-c4 14.Bh5-f7 Bc4-d5 15.Rh2xh4 Rc8-c5 16.Na5xb3 Bd5xb3 17.Bf7xe6+ Bb3xe6
 23/51	00:01	 45,825k	28,010k	-1.49	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Bh5xf7 Bh3-g4 10.Rd1-f1 Bg4-e2 11.Rf1-e1 Be2xb5 12.Nd6xb5 Rc7xc6 13.Bf7-g6 Rc6-c2+ 14.Kb2-b1 Be3-c5 15.Re1xe4 Rc2-g2 16.Re4xa4 Rg2xg6 17.Ra4xh4 Rg6-g2 18.Rh4-h3 Kf8-f7 19.Rh3xb3 Kf7-f6 20.Rb3-c3 Bc5-b4 21.Rc3-e3
 24/56	00:02	 78,631k	28,133k	-1.11	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Bh5-g6 Be3-g5 12.Rh4-h8+ Kf8-g7 13.Rh8-h2 Kg7xg6 14.Rh2xg2 Kg6-h5 15.Rg2-h2+ Kh5-g4 16.Rh2-g2+ Kg4-h4 17.Rg2-g1 e4-e3 18.Kb2-a3 e3-e2 19.Nd6-c4 Rc7-g7 20.Rg1-e1 f5-f4 21.Nc4-d2
 25/56+	00:03	 90,016k	28,156k	-1.01	1.Nf6-d7+
 25/56+	00:03	 93,162k	28,154k	-0.92	1.Nf6-d7+
 25/56-	00:03	 95,015k	28,153k	-1.21	1.Nf6-d7+ Kf8-e8
 25/56	00:03	 99,714k	28,136k	-1.40	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 Rc7-d7 11.Nd6-c4 Be3-c5 12.Bh5-e2 e4-e3 13.Kb2-c3 f7-f5 14.Nc6-e5 Rd7-c7 15.Ne5-d3 Bc5-e7 16.b5-b6 Be7-f6+ 17.Kc3-b4 Rc7-b7 18.Rh4-f4 b3-b2 19.Nd3xb2 Bf6xb2 20.Nc4xb2 Rb7xb6+ 21.Kb4-a3 Rb6-b3+ 22.Ka3-a2 Bg2-d5 23.Rf4xa4 Kf8-e7 24.Be2-c4 Bd5xc4
 26/55+	00:03	 102,861k	28,112k	-1.30	1.Nf6-d7+
 26/55+	00:03	 103,465k	28,108k	-1.20	1.Nf6-d7+
 26/55+	00:03	 104,878k	28,110k	-1.06	1.Nf6-d7+
 26/55	00:03	 105,557k	28,103k	-1.21	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 Rc7-d7 11.Nd6-c4 Be3-c5 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Bf1xe2 14.Rh2xe2 Rd7-b7 15.Re2xe4 Rb7xb5 16.Re4-e1 Rb5-b7 17.Re1-f1 Kf8-g8 18.Rf1-c1 Kg8-g7 19.Nc4-a3 Bc5-f8 20.Na3-c4 Rb7-c7 21.Nc6-d4 Bf8-c5 22.Nd4-b5 Rc7-b7 23.Nb5-c3 Bc5-d4 24.Kb2-a3 Rb7-a7 25.Nc3xa4
 27/59+	00:03	 110,435k	28,108k	-1.11	1.Nf6-d7+
 27/59+	00:03	 112,308k	28,112k	-1.01	1.Nf6-d7+
 27/59+	00:04	 117,804k	28,136k	-0.86	1.Nf6-d7+
 27/60	00:04	 120,574k	28,139k	-0.87	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-f5 10.Rh1xh4 Rc7-d7 11.Nd6-c4 Be3-c5 12.Bh5-e2 e4-e3 13.Rh4-h8+ Kf8-g7 14.Rh8-h1 Bf5-c2 15.Rh1-g1+ Kg7-f6 16.Rg1-f1+ Kf6-g5 17.Nc6-e5 a4-a3+ 18.Kb2-c3 Rd7-d5 19.Ne5xf7+ Kg5-g6 20.Nf7-e5+ Kg6-g7 21.b5-b6 Bc5xb6 22.Nc4xb6 Rd5xe5 23.Nb6-d7
 28/56-	00:04	 128,254k	28,151k	-0.97	1.Nf6-d7+ Kf8-e8
 28/56-	00:04	 138,288k	28,102k	-1.07	1.Nf6-d7+ Kf8-e8
 28/56-	00:05	 147,044k	28,105k	-1.22	1.Nf6-d7+ Kf8-e8
 28/65+	00:06	 170,160k	28,107k	-1.09	1.Nf6-d7+
 28/65-	00:06	 171,037k	28,099k	-1.42	1.Nf6-d7+ Kf8-e8
 28/65+	00:06	 185,218k	28,089k	-1.12	1.Nf6-d7+
 28/65	00:06	 186,841k	28,088k	-1.17	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Nd6-e8 Rc7-e7 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Re7xe8 14.Be2xf1 Kf8-f7 15.Bf1-c4 Kf7-f6 16.Kb2-c3 Be3-c5 17.Rh2-h6+ Kf6-g5 18.Rh6-h1 f5-f4 19.Rh1-a1 a4-a3 20.Kc3xb3 f4-f3 21.Ra1-h1 Re8-a8 22.Kb3-a2 f3-f2 23.Nc6-e5 e4-e3 24.Bc4-e2 Kg5-f5 25.Ne5-d7
 29/63-	00:07	 223,687k	28,084k	-1.27	1.Nf6-d7+ Kf8-e8
 29/63-	00:08	 236,157k	28,080k	-1.37	1.Nf6-d7+ Kf8-e8
 29/63-	00:09	 259,639k	28,109k	-1.51	1.Nf6-d7+ Kf8-e8
 29/63+	00:09	 278,638k	28,128k	-1.39	1.Nf6-d7+
 29/63	00:10	 287,428k	28,143k	-1.17	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Qh1xh2 Rg8-g1+ 5.Qh2xg1 Bd4xg1 6.Nb7xd6+ Ke8-f8 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Nd6-e8 Rc7-e7 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Re7xe8 14.Be2xf1 Kf8-f7 15.Bf1-c4 Kf7-f6 16.Kb2-c3 f5-f4 17.Rh2-h6+ Kf6-g5 18.Rh6-h1 f4-f3 19.Rh1-a1 e6-e5 20.Ra1xa4 Be3-d4+ 21.Kc3xb3 Kg5-f4 22.Kb3-c2
 30/56-	00:11	 319,020k	28,192k	-1.27	1.Nf6-d7+ Kf8-e8
 30/60-	00:11	 336,480k	28,216k	-1.37	1.Nf6-d7+ Kf8-e8
 30/60-	00:12	 354,399k	28,248k	-1.52	1.Nf6-d7+ Kf8-e8
 30/60+	00:12	 362,516k	28,253k	-1.39	1.Nf6-d7+
 30/60	00:12	 363,453k	28,254k	-1.53	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Qh1xh2 Rg8-g1+ 5.Qh2xg1 Bd4xg1 6.Nb7xd6+ Ke8-f8 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Nd6-e8 Rc7-e7 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Re7xe8 14.Be2xf1 Kf8-f7 15.Bf1-c4 Kf7-f6 16.Kb2-c3 Re8-g8 17.Kc3-b4 Be3-c1 18.b5-b6 b3-b2 19.Bc4-a2 a4-a3 20.b6-b7 Bc1-f4 21.Rh2-h1 Bf4-d6+ 22.Kb4-a4 Rg8-g3 23.Rh1-h6+ Rg3-g6 24.Rh6xg6+ Kf6xg6 25.b7-b8Q Bd6xb8 26.Ka4xa3 e4-e3 27.Nc6-d4 Bb8-e5 28.Nd4-f3
 31/57-	00:16	 457,735k	28,318k	-1.63	1.Nf6-d7+ Kf8-e8
 31/67-	00:16	 467,235k	28,317k	-1.73	1.Nf6-d7+ Kf8-e8
 31/67+	00:16	 471,641k	28,313k	-1.63	1.Nf6-d7+
 31/67-	00:17	 506,716k	28,338k	-1.88	1.Nf6-d7+ Kf8-e8
 31/67+	00:19	 541,391k	28,320k	-1.65	1.Nf6-d7+
 31/67	00:19	 557,859k	28,328k	-1.86	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Qh1xh2 Rg8-g1+ 5.Qh2xg1 Bd4xg1 6.Nb7xd6+ Ke8-f8 7.Nd6xc8 b3-b2 8.Ra1-b1 a4-a3 9.Nc6-b4 e6-e5 10.Nb4-c2 Bh3xc8 11.Nc2xa3 h4-h3 12.Rb1xb2 h3-h2 13.Rb2xh2 Bg1xh2 14.Ke1-f1 Kf8-e7 15.b5-b6 Bh2-f4 16.Na3-c4 e4-e3 17.Bh5-f3 Bc8-e6 18.Nc4-a5 f7-f5 19.Na5-c6+ Ke7-d7 20.b6-b7 e5-e4 21.b7-b8Q Bf4xb8 22.Nc6xb8+ Kd7-d6 23.Bf3-d1 f5-f4 24.Nb8-a6 f4-f3 25.Bd1-e2 Kd6-e5
 32/48-	00:22	 645,582k	28,357k	-1.96	1.Nf6-d7+ Kf8-e8
 32/72+	00:23	 678,651k	28,360k	-1.86	1.Nf6-d7+
 32/72-	00:24	 697,574k	28,376k	-2.06	1.Nf6-d7+ Kf8-e8
 32/73+	00:25	 727,483k	28,397k	-1.88	1.Nf6-d7+
 32/73	00:26	 761,896k	28,411k	-2.10	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Nd6-e8 Rc7-e7 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Re7xe8 14.Be2xf1 Kf8-f7 15.Rh2-h3 Be3-b6 16.Rh3-h1 Kf7-f6 17.Bf1-c4 Re8-g8 18.Rh1-h6+ Rg8-g6 19.Rh6xg6+ Kf6xg6 20.Nc6-e5+ Kg6-g5 21.Ne5-d7 Bb6-d4+ 22.Kb2-c1 f5-f4 23.b5-b6 b3-b2+ 24.Kc1-c2 a4-a3 25.b6-b7 Bd4-a7 26.Nd7-e5 Ba7-b8 27.Ne5-c6 Bb8-d6 28.Bc4xe6 f4-f3 29.Nc6-d4 f3-f2 30.Be6-c4 Bd6-e5
 33/64+	00:28	 807,333k	28,409k	-2.00	1.Nf6-d7+
 33/77+	00:28	 812,407k	28,406k	-1.91	1.Nf6-d7+
 33/77+	00:28	 815,342k	28,405k	-1.76	1.Nf6-d7+
 33/77	00:29	 831,130k	28,406k	-1.72	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.O-O-O Bg1-e3+ 8.Kc1-b2 Rc8-c7 9.Rd1-h1 Bh3-g2 10.Rh1xh4 f7-f5 11.Nd6-e8 Rc7-e7 12.Rh4-h2 Bg2-f1 13.Bh5-e2 Re7xe8 14.Be2xf1 Kf8-f7 15.Rh2-h3 Be3-b6 16.Bf1-c4 Kf7-f6 17.Rh3-h1 Re8-g8 18.Rh1-h6+ Rg8-g6 19.Rh6xg6+ Kf6xg6 20.Nc6-e5+ Kg6-g5 21.Ne5-d7 Bb6-d4+ 22.Kb2-c1 f5-f4 23.b5-b6 f4-f3 24.b6-b7 Bd4-a7 25.Nd7-c5 e4-e3 26.Nc5xa4 Ba7-b8 27.Na4-c3 Bb8-e5 28.Kc1-d1 b3-b2 29.Bc4-d3
 34/76+	00:31	 885,294k	28,410k	-1.62	1.Nf6-d7+
 34/76-	00:31	 903,879k	28,414k	-1.82	1.Nf6-d7+ Kf8-e8
 34/76+	00:32	 920,035k	28,422k	-1.67	1.Nf6-d7+
 34/76+	00:34	 986,672k	28,462k	-1.20	1.Nf6-d7+
 34/76	00:35	 1,002,145k	28,471k	-1.08	1.Nf6-d7+ Kf8-e8 2.Nd7-c5 c7xd6 3.Nc5xb7 Bh8xd4 4.Nb7xd6+ Ke8-f8 5.Qh1xh2 Rg8-g1+ 6.Qh2xg1 Bd4xg1 7.Nd6xc8 b3-b2 8.Ra1-b1 a4-a3 9.Nc6-b4 e6-e5 10.Nb4-c2 Bh3xc8 11.Nc2xa3 h4-h3 12.Ke1-f1 h3-h2 13.Kf1-g2 Bc8-b7 14.Rb1xg1 h2xg1Q+ 15.Kg2xg1 f7-f5 16.Kg1-f1 f5-f4 17.Kf1-e2 Kf8-e7 18.Ke2-d2 Ke7-f6 19.Bh5-d1 Kf6-g5 20.Kd2-c2 f4-f3 21.Na3-c4 b2-b1B+ 22.Kc2xb1 Kg5-f4 23.Kb1-c1 Bb7-d5
 35/76-	00:35	 1,012,464k	28,477k	-1.18	1.Nf6-d7+ Kf8-e8
 35/76-	00:35	 1,018,114k	28,475k	-1.28	1.Nf6-d7+ Kf8-e8
 35/76+	00:37	 1,080,382k	28,457k	-1.18	1.Nf6-h7+
 35/76+	00:39	 1,128,517k	28,425k	+1.53	1.Nf6-h7+
 35/76	00:40	 1,140,742k	28,428k	+1.96	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-b4+ Ke7-f6 17.Rd1xd8 Rg8xd8 18.Qb4xe4 b3-b2 19.Ka3xb2 Rd8-d2+ 20.Kb2-c3 Rd2-c2+ 21.Kc3-d4 h2-h1Q 22.Qe4xh1 e6-e5+ 23.Kd4-e3 a4-a3 24.Qh1-e4 Bh3-f5 25.Qe4-b4 Kf6-g5 26.Bh5-f3 a3-a2 27.Qb4-e7+ Kg5-g6 28.Qe7xe5 Rc2-c1
 36/67+	00:40	 1,163,035k	28,437k	+2.06	1.Nf6-h7+
 36/67+	00:41	 1,171,493k	28,436k	+2.16	1.Nf6-h7+
 36/69+	00:42	 1,211,628k	28,434k	+2.78	1.Nf6-h7+
 36/72	00:43	 1,229,135k	28,431k	+3.04	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 e4-e3 25.Qh2-f4+ Kd4-d3 26.Ka4xb3 Bf5-e4 27.Qf4-f1+ Kd3-d4 28.Qf1-a1+ Kd4-d5 29.Qa1-a5+ Kd5-d6 30.Qa5-b6+ Kd6-d7 31.Bh5-e2 Rc8-a8 32.Kb3-b4
 37/70+	00:44	 1,259,817k	28,442k	+3.14	1.Nf6-h7+
 37/70+	00:44	 1,266,233k	28,447k	+3.23	1.Nf6-h7+
 37/83+	00:46	 1,338,289k	28,479k	+3.58	1.Nf6-h7+
 37/83	00:47	 1,345,636k	28,484k	+3.41	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 h2-h1Q 16.Qd4-d7+ Ke7-f6 17.Rd1xh1 Bh3-f5 18.Qd7-d4+ Kf6-e7 19.Rh1xh4 Rg8-g3 20.Rh4-h2 Rg3-d3 21.Qd4-b4+ Ke7-f6 22.Bh5-e2 Rd3-d8 23.Be2-b5 Rc8-c1 24.Bb5xa4 Rc1-a1+ 25.Ka3xb3 Ra1-b1+ 26.Rh2-b2 Rd8-d3+ 27.Kb3-a2 Rb1xb2+ 28.Ka2xb2 e4-e3 29.Qb4-h4+ Kf6-e5 30.Qh4-g3+ Ke5-f6 31.Ba4-b5 Rd3-d5 32.Bb5-c4 Rd5-e5 33.Qg3-h2
 38/68+	00:47	 1,366,036k	28,494k	+3.51	1.Nf6-h7+
 38/68-	00:50	 1,431,522k	28,529k	+3.31	1.Nf6-h7+ Kf8-e8
 38/68+	00:50	 1,451,097k	28,541k	+3.46	1.Nf6-h7+
 38/82+	00:51	 1,482,110k	28,559k	+3.93	1.Nf6-h7+
 38/92	00:53	 1,542,648k	28,584k	+4.11	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 h2-h1Q 16.Qd4-d7+ Ke7-f6 17.Rd1xh1 Bh3-f5 18.Qd7-d4+ Kf6-e7 19.Rh1-d1 b3-b2 20.Qd4-b4+ Ke7-f6 21.Qb4xb2+ Kf6-e7 22.Qb2-b4+ Ke7-f6 23.Qb4-d4+ Kf6-e7 24.Bh5-e2 Rc8-a8 25.Rd1-b1 Rg8-g3+ 26.Ka3-a2 Ke7-f7 27.Rb1-b7+ Kf7-g8 28.Be2-c4 a4-a3 29.Qd4-f6 Rg3-g2+ 30.Ka2-a1 Rg2-g1+ 31.Rb7-b1 Rg1xb1+ 32.Ka1xb1 Kg8-h7 33.Kb1-a2 h4-h3 34.Bc4xe6 Bf5xe6+ 35.Qf6xe6 Ra8-h8 36.Qe6xh3+ Kh7-g7 37.Qh3-g4+ Kg7-f6 38.Qg4-f4+ Kf6-g7 39.Qf4xe4
 39/71+	00:55	 1,583,977k	28,604k	+4.21	1.Nf6-h7+
 39/94+	00:57	 1,647,779k	28,637k	+4.30	1.Nf6-h7+
 39/94+	00:58	 1,668,414k	28,643k	+4.45	1.Nf6-h7+
 39/94	00:59	 1,715,496k	28,665k	+4.52	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-d5 24.Ka3xa4 Kd4-c3 25.Qh2-c7+ Kc3-d2 26.Ka4xb3 Rd5-d3+ 27.Kb3-b2 Kd2-e1 28.Qc7-c1+ Ke1-f2 29.Qc1-f4+ Kf2-e1 30.Qf4-h4+ Ke1-f1 31.Qh4-h1+ Kf1-f2 32.Qh1-h2+ Kf2-e3 33.Qh2-g3+ Ke3-d4 34.Qg3-f4 Kd4-d5 35.Bh5-e2 Rd3-h3 36.Kb2-c2 Bf5-g6 37.Qf4-c7 Bg6-f5 38.Be2-c4+ Kd5-d4 39.Bc4-f1 Rh3-h7 40.Qc7-c3+ Kd4-d5 41.Bf1-c4+ Kd5-d6 42.Qc3-d4+ Kd6-c7 43.Kc2-c3 Kc7-b8 44.Qd4-e5+ Kb8-b7 45.Bc4xe6
 40/80	01:03	 1,827,337k	28,711k	+4.61	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Kd4-c4 25.Qh2-e2+ Kc4-d4 26.Qe2-d2+ Kd4-e5 27.Qd2-h2+ Ke5-d4 28.Qh2-d6+ Kd4-c3 29.Qd6-b4+ Kc3-c2 30.Qb4xb3+ Kc2-d2 31.Qb3-b4+ Kd2-d3 32.Qb4-d6+ Kd3-e3 33.Ka4-b3 Ke3-f2 34.Qd6-h2+ Kf2-e3 35.Qh2-g3+ Ke3-d4 36.Bh5-e2 Rc8-c6 37.Qg3-g1+ Kd4-e5 38.Qg1-f2 Rc6-c8 39.Qf2-g3+ Ke5-d5
 41/80+	01:06	 1,900,017k	28,755k	+4.70	1.Nf6-h7+
 41/86	01:08	 1,970,231k	28,800k	+4.72	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Kd4-c4 25.Qh2-e2+ Kc4-d4 26.Qe2-d2+ Kd4-e5 27.Qd2-h2+ Ke5-f6 28.Bh5-d1 Rc8-g8 29.Ka4xb3 Rg8-g7 30.Qh2-h4+ Kf6-e5 31.Qh4-h8 Ke5-f6 32.Bd1-h5 Bf5-g6 33.Bh5-e2 Kf6-f7 34.Kb3-b4 Bg6-f5 35.Qh8-h5+ Rg7-g6 36.Qh5-h7+ Kf7-f6 37.Qh7-h8+ Kf6-e7 38.Be2-h5 Rg6-g2 39.Qh8-d4 Rg2-c2 40.Kb4-b3 Rc2-c8 41.Qd4-e5 Rc8-a8 42.Qe5-g7+ Ke7-d6
 42/83+	01:14	 2,165,373k	28,887k	+4.82	1.Nf6-h7+
 42/84	01:15	 2,193,955k	28,909k	+4.83	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Kd4-c4 25.Qh2-e2+ Kc4-d4 26.Qe2-d2+ Kd4-e5 27.Qd2-h2+ Ke5-f6 28.Bh5-d1 Rc8-g8 29.Ka4xb3 Kf6-f7 30.Qh2-h4 e4-e3 31.Bd1-h5+ Bf5-g6 32.Qh4-f4+ Kf7-e7 33.Bh5-e2 Bg6-f5 34.Qf4-e5 Ke7-f7 35.Be2-h5+ Bf5-g6 36.Bh5-d1 Kf7-e7 37.Bd1-e2 Ke7-d7 38.Be2-b5+ Kd7-e7 39.Qe5-g5+ Ke7-f7
 43/80+	01:22	 2,390,219k	28,982k	+4.92	1.Nf6-h7+
 43/80+	01:28	 2,570,890k	29,043k	+5.02	1.Nf6-h7+
 43/92+	01:35	 2,799,417k	29,186k	+5.17	1.Nf6-h7+
 43/92	01:37	 2,847,828k	29,213k	+5.25	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Rc8-c2 25.Qh2-d6+ Kd4-e3 26.Qd6-g3+ Ke3-d4 27.Ka4xb3 Rc2-c6 28.Qg3-f2+ Kd4-e5 29.Qf2-b2+ Ke5-d5 30.Qb2-d2+ Kd5-e5 31.Qd2-d7 Rc6-c1 32.Qd7-g7+ Ke5-d5 33.Bh5-d1 e4-e3 34.Bd1-f3+ Kd5-d6 35.Qg7-d4+ Kd6-e7 36.Qd4xe3 Rc1-c8 37.Qe3-g5+ Ke7-d6 38.Bf3-e2 Rc8-h8 39.Kb3-b4 Rh8-h7 40.Qg5-f4+ Kd6-e7 41.Kb4-c5 Ke7-f6
 44/75+	01:41	 2,964,070k	29,271k	+5.35	1.Nf6-h7+
 44/86	01:43	 3,021,638k	29,296k	+5.38	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-d5 24.Ka3xa4 Kd4-c3 25.Qh2-b8 Kc3-d2 26.Qb8xb3 Rd5-d4+ 27.Ka4-b5 Rd4-d3 28.Qb3-b2+ Kd2-e3 29.Kb5-c4 Ke3-f4 30.Qb2-h2+ Kf4-g5 31.Bh5-e2 Rd3-d7 32.Kc4-c3 Kg5-f6 33.Qh2-h4+ Kf6-e5 34.Qh4-h8+ Ke5-f4 35.Qh8-h2+ Kf4-g5 36.Be2-c4 Kg5-g4 37.Qh2-g2+ Kg4-f4 38.Qg2-f2+ Kf4-g5 39.Qf2-e3+ Kg5-g6 40.Qe3-g3+ Kg6-f6 41.Qg3-h4+ Kf6-g6 42.Qh4-h2 Rd7-f7 43.Kc3-d4 Rf7-f6 44.Qh2-h4
 45/98+	01:52	 3,295,016k	29,400k	+5.48	1.Nf6-h7+
 45/98+	01:55	 3,391,654k	29,429k	+5.58	1.Nf6-h7+
 45/98+	02:16	 4,060,754k	29,711k	+6.56	1.Nf6-h7+
 45/99-	02:19	 4,135,552k	29,739k	+5.28	1.Nf6-h7+ Kf8-e8
 45/99+	02:19	 4,158,066k	29,746k	+6.15	1.Nf6-h7+
 45/99	02:27	 4,405,826k	29,811k	+6.79	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Rc8-c4+ 25.Ka4-a3 Rc4-c6 26.Qh2-f2+ Kd4-e5 27.Ka3xb3 Rc6-c8 28.Qf2-h2+ Ke5-f6 29.Bh5-e2 Kf6-e7 30.Qh2-h4+ Ke7-d6 31.Qh4-f4+ Kd6-e7 32.Qf4-g5+ Ke7-d6 33.Be2-c4 Rc8-b8+ 34.Kb3-c3 Rb8-b1 35.Qg5-d8+ Kd6-e5 36.Qd8-h8+ Ke5-d6 37.Bc4-e2 Kd6-d7 38.Kc3-d4 Rb1-b2 39.Qh8-e5 Kd7-e7 40.Qe5-g7+ Ke7-d6 41.Qg7-f8+ Kd6-c7 42.Qf8-c5+ Kc7-b8 43.Qc5-e5+ Kb8-a7 44.Be2-c4 Rb2-b1 45.Qe5-c5+ Ka7-b8
 46/99	02:30	 4,486,739k	29,821k	+6.79	1.Nf6-h7+ Kf8-e8 2.Bd4-g7 Bh8xg7 3.d6-d7+ Ke8xd7 4.O-O-O+ Kd7-e8 5.Rd1-d7 Bg7-h6+ 6.Kc1-b2 Bh6-g7+ 7.Kb2-a3 Bg7-f8+ 8.Nh7xf8 Qb7xb5 9.Rd7-e7+ Ke8xf8 10.Re7xf7+ Kf8-e8 11.Qh1-d1 Qb5xc6 12.Rf7xc7+ Ke8-f8 13.Qd1-d4 Qc6-c1+ 14.Rc7xc1 Kf8-e7 15.Rc1-d1 Rc8-d8 16.Qd4-a7+ Ke7-f6 17.Qa7-f7+ Kf6-g5 18.Rd1xd8 Rg8xd8 19.Qf7-g6+ Kg5-f4 20.Qg6-f6+ Bh3-f5 21.Qf6xh4+ Kf4-e3 22.Qh4-g3+ Ke3-d4 23.Qg3xh2 Rd8-c8 24.Ka3xa4 Rc8-c4+ 25.Ka4-a3 Rc4-c6 26.Qh2-f2+ Kd4-e5 27.Ka3xb3 Rc6-c8 28.Qf2-h2+ Ke5-f6 29.Bh5-e2 Kf6-e7 30.Qh2-h4+ Ke7-d6 31.Qh4-f4+ Kd6-e7 32.Qf4-g5+ Ke7-d6 33.Be2-c4 Rc8-b8+ 34.Kb3-c3 Rb8-b1 35.Qg5-d8+ Kd6-e5 36.Qd8-h8+ Ke5-d6 37.Bc4-e2 Kd6-d7 38.Kc3-d4 Rb1-b2 39.Qh8-e5 Kd7-e7 40.Qe5-g7+ Ke7-d6 41.Qg7-f8+ Kd6-c7 42.Qf8-c5+ Kc7-b8 43.Qc5-e5+ Kb8-a7 44.Be2-c4 Rb2-b1 45.Qe5-c5+ Ka7-b8
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jp
Posts: 1470
Joined: Mon Apr 23, 2018 7:54 am

Re: Fairly difficult EG puzzle

Post by jp »

Nordlandia wrote: ↑Thu Apr 02, 2020 9:59 pm Jan Timman | Special Price

1. Nd5 💣

8/p7/1pp3b1/4p3/P3P1P1/2N1k2p/2B4K/8 w - - 0 0
Komodo 13.2 fails (depth 38):
+0.33 1.Bb1 Bf7 2.g5 Kd4 3.Ne2+ Ke3 4.Nc1 b5 5.axb5 cxb5 6.Kxh3 a5 7.Ba2 Be8 8.Kg4 Bg6 9.Bd5 a4 10.Bc6 a3 11.Bd5 Kd2 12.Na2 Kc2 13.Kf3 Kd3 14.Kf2 Kd2 15.Kg3 Kc2 16.Kg4 Kd2 17.Kh4 Kd3 18.Be6 Kd2 19.Kg3 Kd3 20.Bf5 Bf7 21.Nb4+ Kc3 22.g6 Bg8

Even with 1.Nd5 on the board it can only find a draw:
depth=44
0.00 1...cxd5 2.exd5 Be8 3.g5 Kd4 4.g6 Bxg6 5.Bxg6 Kxd5 6.Kxh3 Kc5 7.Be8 a6 8.Kg4 b5 9.axb5 axb5 10.Bxb5 Kxb5 11.Kf5 Kb4 12.Kxe5 Kc5 13.Ke4 Kb4 14.Kf3 Kc5 15.Ke3 Kb4 16.Kd2 Kc5 17.Kc2 Kd5 18.Kd2 Kc5
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mmt
Posts: 343
Joined: Sun Aug 25, 2019 8:33 am
Full name: .

Re: Fairly difficult EG puzzle

Post by mmt »

LC0 0.24.1 with 384x30-t60-3180 gets Nh7+ with a positive score in 9 seconds on my system (Titan V + 2080Ti). With 63053 it finds Nh7+ with a positive score in 6 seconds.
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acase
Posts: 983
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Fairly difficult EG puzzle

Post by acase »

Nordlandia wrote: ↑Thu Apr 02, 2020 9:59 pm Jan Timman | Special Price

1. Nd5 💣

[d]8/p7/1pp3b1/4p3/P3P1P1/2N1k2p/2B4K/8 w - - 0 0
Sting-SF 19 finds the key move in 7 seconds on my 20 core dual xeon 2.8GHZ 8GB hash (max for sting)


Code: Select all

Sting-sf-19:
 1	00:03	 39	10	+1.97	1.Kh2xh3
 2	00:03	 148	39	+1.93	1.Kh2xh3 c6-c5
 3	00:03	 1k	282	+0.68	1.a4-a5 Ke3-d4 2.a5xb6
 4	00:03	 1k	388	+0.48	1.a4-a5 b6-b5 2.Kh2xh3 b5-b4 3.Nc3-a2
 5	00:03	 2k	594	+0.44	1.Nc3-d1+ Ke3-d2 2.Bc2-b3 Bg6xe4 3.Kh2xh3
 6-	00:03	 3k	774	+0.28	1.Nc3-d1+ Ke3-d2
 6	00:03	 3k	909	+0.28	1.Bc2-b3 Ke3-d2 2.Nc3-b1+ Kd2-d3 3.Kh2xh3 Bg6xe4
 7-	00:03	 6k	2k	+0.14	1.Bc2-b3 Ke3-d2
 7-	00:03	 6k	2k	 0.00	1.Bc2-b3 Ke3-d2
 7-	00:03	 7k	2k	-0.16	1.Bc2-b3 Ke3-d2
 7	00:03	 8k	2k	-0.16	1.Bc2-b3 Ke3-d2 2.Nc3-d1 Bg6xe4 3.Kh2xh3 Be4-d5 4.Bb3xd5 c6xd5
 8+	00:03	 9k	2k	-0.02	1.Bc2-b3
 8+	00:03	 10k	3k	+0.09	1.Bc2-b3
 8	00:03	 11k	3k	 0.00	1.Bc2-b3 Ke3-d2 2.Nc3-d1 c6-c5 3.Kh2xh3 c5-c4 4.Bb3xc4 Kd2xd1 5.Bc4-d5 Kd1-d2
 9	00:03	 25k	7k	 0.00	1.Bc2-b3 Ke3-d2 2.Nc3-d1 c6-c5 3.Kh2xh3 c5-c4 4.Bb3xc4 Kd2xd1 5.Bc4-d5 Kd1-d2 6.Kh3-g3 Kd2-e3 7.g4-g5 Ke3-d4
 10	00:03	 39k	10k	 0.00	1.Bc2-b3 Ke3-d2 2.Nc3-d1 c6-c5 3.Kh2xh3 c5-c4 4.Bb3xc4 Kd2xd1 5.Bc4-d5 Kd1-e2 6.g4-g5 Bg6-e8 7.Kh3-g4
 11-	00:03	 50k	13k	-0.08	1.Bc2-b3 Ke3-d2
 11-	00:03	 53k	14k	-0.16	1.Bc2-b3 Ke3-d2
 11	00:03	 54k	14k	-0.16	1.Bc2-b3 Ke3-d2 2.Nc3-d1 c6-c5 3.Kh2xh3 c5-c4 4.Bb3xc4 Kd2xd1 5.Bc4-d5 Kd1-e2 6.g4-g5 Ke2-f3 7.Bd5-c6 a7-a6 8.Bc6-d5 Kf3-f4
 12+	00:03	 86k	22k	-0.04	1.Bc2-b3
 12	00:03	 95k	25k	 0.00	1.Bc2-b3 Ke3-d2 2.Nc3-d1 c6-c5 3.Kh2xh3 c5-c4 4.Bb3xc4 Kd2xd1 5.Bc4-d5 Kd1-e2 6.Kh3-g3 Ke2-e3 7.g4-g5 Ke3-d4
 13-	00:03	 161k	41k	-0.08	1.Bc2-b3 Ke3-d2
 13-	00:03	 177k	45k	-0.16	1.Bc2-b3 Ke3-d2
 13-	00:03	 199k	51k	-0.28	1.Bc2-b3 Ke3-d2
 13	00:03	 236k	60k	-0.16	1.Bc2-b3 Ke3-d2 2.Nc3-d1 b6-b5 3.Kh2xh3 b5-b4 4.Nd1-f2 Kd2-c3 5.Bb3-e6 c6-c5 6.Kh3-h4 Bg6-e8 7.Kh4-g5 c5-c4 8.Kg5-f5 Kc3-d4 9.a4-a5
 14-	00:03	 335k	84k	-0.28	1.Bc2-b3 Ke3-d2
 14-	00:03	 377k	95k	-0.40	1.Bc2-b3 Ke3-d2
 14	00:04	 399k	100k	-0.32	1.Bc2-b3 Ke3-d2 2.Nc3-d1 b6-b5 3.Kh2xh3 b5-b4 4.Nd1-f2 c6-c5 5.Kh3-h4 Kd2-e3 6.Kh4-g5 Bg6-e8 7.Nf2-d1+ Ke3xe4 8.Kg5-f6 Ke4-d4 9.Kf6-e7 Be8-g6 10.Ke7-d6
 15-	00:04	 511k	127k	-0.44	1.Bc2-b3 Ke3-d2
 15+	00:04	 550k	136k	-0.20	1.Bc2-b3
 15-	00:04	 602k	148k	-0.56	1.Bc2-b3 Ke3-d2
 15+	00:04	 630k	155k	-0.02	1.Bc2-b3
 15	00:04	 723k	177k	 0.00	1.Bc2-b3 Ke3-d2 2.Nc3-d1 b6-b5 3.Kh2xh3 b5-b4 4.Nd1-f2 c6-c5 5.Kh3-g3 Kd2-c3 6.Bb3-e6 b4-b3 7.Nf2-d1+ Kc3-b4 8.Be6-f5 Bg6-e8 9.g4-g5 Be8-h5 10.Bf5-g4 Bh5-g6 11.Bg4-f5 Bg6-h5
 16+	00:04	 1,254k	299k	+0.08	1.Bc2-b1
 16+	00:04	 1,292k	308k	+0.16	1.Bc2-b1
 16+	00:04	 1,425k	338k	+0.46	1.Bc2-b1
 16-	00:04	 1,683k	396k	 0.00	1.Bc2-b1 a7-a6
 16+	00:04	 1,700k	399k	 0.00	1.Bc2-b1
 16	00:04	 1,733k	405k	 0.00	1.Bc2-b1 a7-a6 2.Kh2xh3 b6-b5 3.a4xb5 a6xb5 4.Kh3-h4 Ke3-d2 5.Kh4-g5 Bg6-f7 6.Kg5-f6 Bf7-c4 7.Nc3-d5 c6xd5 8.e4xd5 Bc4xd5 9.Kf6xe5 Bd5-c4
 17-	00:04	 2,066k	478k	-0.08	1.Bc2-b1 a7-a6
 17+	00:04	 2,130k	491k	 0.00	1.Bc2-b1
 17-	00:04	 2,142k	492k	 0.00	1.Bc2-b1 a7-a6
 17-	00:04	 2,372k	540k	-0.18	1.Bc2-b1 a7-a6
 17	00:04	 2,429k	551k	 0.00	1.Bc2-b1 a7-a6 2.Kh2xh3 b6-b5 3.a4xb5 a6xb5 4.Kh3-h4 b5-b4 5.Kh4-g5 Bg6-e8 6.Nc3-a4 Ke3-d4 7.Bb1-c2 c6-c5 8.Na4xc5 Kd4xc5 9.Kg5-f6 Kc5-d4 10.g4-g5 Kd4-c3 11.Bc2-d1 Kc3-d4 12.Bd1-c2
 18	00:04	 2,829k	627k	 0.00	1.Bc2-b1 a7-a6
 19+	00:04	 3,077k	677k	+0.08	1.Bc2-b1
 19	00:04	 3,627k	778k	 0.00	1.Bc2-b1 a7-a6 2.Kh2xh3 b6-b5 3.a4xb5 a6xb5 4.Kh3-h4 b5-b4 5.Kh4-g5 b4xc3 6.Kg5xg6 Ke3-d2 7.Kg6-f5 Kd2-c1 8.Bb1-d3 Kc1-d2 9.Bd3-b1
 20	00:04	 4,584k	945k	 0.00	1.Bc2-b1 a7-a6 2.Kh2xh3 b6-b5 3.a4xb5 a6xb5 4.Kh3-h4 b5-b4 5.Kh4-g5 b4xc3 6.Kg5xg6 Ke3-d2 7.Kg6-f5 Kd2-c1 8.Bb1-d3 Kc1-d2 9.Bd3-b1
 21	00:04	 5,238k	1,050k	 0.00	1.Bc2-b1 a7-a6
 22+	00:05	 6,326k	1,235k	+0.08	1.Bc2-b1
 22+	00:05	 6,765k	1,307k	+0.16	1.Bc2-b1
 22+	00:05	 8,985k	1,665k	+0.46	1.Bc2-b1
 22	00:06	 17,833k	2,956k	+0.52	1.Bc2-b1 Bg6-f7 2.g4-g5 Ke3-f4 3.Kh2xh3 Kf4xg5 4.Kh3-g3 Bf7-c4 5.Nc3-d1 Bc4-b3 6.Nd1-b2 b6-b5 7.a4xb5 c6xb5 8.Nb2-d3 Kg5-f6 9.Nd3-c5 Bb3-c4 10.Nc5-a6 Kf6-e6 11.Kg3-f2 Ke6-d7 12.Bb1-c2 Kd7-c6 13.Kf2-e3
 23-	00:06	 20,396k	3,245k	+0.40	1.Bc2-b1 Bg6-f7
 23-	00:06	 22,071k	3,421k	+0.28	1.Bc2-b1 Bg6-f7
 23	00:06	 27,492k	3,953k	+0.52	1.Bc2-b1 Bg6-f7 2.g4-g5 Ke3-f4 3.Kh2xh3 Kf4xg5 4.Kh3-g3 a7-a6 5.Bb1-d3 b6-b5 6.a4xb5 a6xb5 7.Kg3-f3 Bf7-b3 8.Nc3-b1 b5-b4 9.Nb1-d2 Bb3-e6 10.Nd2-c4 Kg5-f6 11.Kf3-e3 b4-b3 12.Nc4-b2 c6-c5 13.Ke3-d2 Kf6-g5 14.Bd3-b5 Kg5-f4 15.Nb2-d3+
 24+	00:07	 33,023k	4,427k	+0.64	1.Nc3-d5+
 24+	00:07	 34,580k	4,526k	+0.76	1.Nc3-d5+
 24+	00:08	 38,964k	4,827k	+1.22	1.Nc3-d5+
 24	00:08	 44,558k	5,227k	+1.53	1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c5 7.Bg6-d3 Kc5-b4 8.Bd3-b5 a7-a6 9.Bb5xa6 Kb4xa4 10.Kh3-g4 b6-b5 11.Kg4-f5 b5-b4 12.Ba6-d3 b4-b3 13.Kf5xe5 b3-b2 14.Bd3-b1 Ka4-b3 15.Ke5-d4 Kb3-b4 16.Kd4-d3 Kb4-b3 17.Kd3-d2
 25-	00:08	 45,525k	5,262k	+1.41	1.Nc3-d5+ c6xd5
 25	00:08	 46,805k	5,330k	+1.53	1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c5 7.Bg6-d3 Kc5-b4 8.Bd3-b5 a7-a6 9.Bb5xa6 Kb4xa4 10.Kh3-g4 b6-b5 11.Kg4-f5 b5-b4 12.Kf5xe5 b4-b3 13.Ba6-d3 b3-b2 14.Bd3-b1 Ka4-b3 15.Ke5-d4 Kb3-b4 16.Kd4-d3 Kb4-b3 17.Kd3-d2
 26-	00:08	 49,605k	5,516k	+1.41	1.Nc3-d5+ c6xd5
 26	00:09	 51,595k	5,608k	+1.37	1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c5 7.Bg6-d3 Kc5-b4 8.Bd3-b5 a7-a6 9.Bb5xa6 Kb4xa4 10.Kh3-g4 b6-b5 11.Kg4-f5 b5-b4 12.Kf5xe5 b4-b3 13.Ba6-d3 b3-b2 14.Bd3-b1 Ka4-b3 15.Ke5-d4 Kb3-b4 16.Kd4-d3 Kb4-b3 17.Kd3-d2 Kb3-c4 18.Kd2-c2 Kc4-d4
 27-	00:09	 53,119k	5,657k	+1.25	1.Nc3-d5+ c6xd5
 27	00:09	 55,338k	5,752k	+1.37	1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Bg6-d3 Kd5-c5 7.Kh2xh3
 28-	00:10	 60,062k	6,001k	+1.29	1.Nc3-d5+ c6xd5
 28-	00:10	 65,255k	6,274k	+1.21	1.Nc3-d5+ c6xd5
 28-	00:11	 74,967k	6,651k	+0.90	1.Nc3-d5+ c6xd5
 28	00:11	 84,097k	7,044k	+1.29	1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c4 7.Bg6-h5 Kc4-b4 8.Bh5-e8 a7-a6 9.Kh3-g4 b6-b5 10.a4xb5 a6xb5 11.Kg4-f5 Kb4-c4 12.Kf5xe5 b5-b4 13.Be8-g6 b4-b3 14.Ke5-f4 b3-b2 15.Bg6-b1 Kc4-d4 16.Kf4-f3 Kd4-c5 17.Kf3-e3
 29	00:12	 85,468k	7,076k	+1.29	1.Nc3-d5+ c6xd5
 30+	00:14	 114,944k	8,062k	+1.37	1.Nc3-d5+
 30+	00:15	 131,209k	8,558k	+1.45	1.Nc3-d5+
 30+	00:20	 206,037k	10,109k	+2.03	1.Nc3-d5+
 30	00:31	 394,102k	12,606k	+1.73	1.Nc3-d5+ Ke3-d2 2.Nd5-e7 Bg6-f7 3.Bc2-b1 b6-b5 4.a4xb5 c6xb5 5.Ne7-c6 Bf7-e8 6.Nc6xe5 Kd2-e3 7.Kh2xh3 Ke3-f4 8.Ne5-d3+ Kf4xe4 9.Nd3-c5+ Ke4-e5 10.Nc5-a6 Be8-d7 11.Kh3-g3 Bd7-c8 12.Na6-b4 Ke5-d6 13.g4-g5 a7-a5 14.Nb4-d3 Bc8-f5 15.Kg3-f4 Bf5-g6 16.Bb1-c2 a5-a4 17.Nd3-b4 Bg6xc2 18.Nb4xc2 Kd6-e7
 31+	00:33	 424,168k	12,714k	+1.85	1.Nc3-d5+
 31+	00:34	 434,731k	12,694k	+1.97	1.Nc3-d5+
 31+	00:37	 481,172k	12,850k	+2.43	1.Nc3-d5+
 31	00:40	 527,171k	13,054k	+2.30	1.Nc3-d5+ Ke3-d2 2.Nd5-e7 Bg6-f7 3.Bc2-b1 b6-b5 4.a4xb5 c6xb5 5.g4-g5 b5-b4 6.g5-g6 Bf7-e6 7.Ne7-c6 b4-b3 8.Nc6xe5 Kd2-c3 9.g6-g7 Be6-g8 10.Ne5-f3
 32+	00:42	 563,152k	13,185k	+2.42	1.Nc3-d5+
 32+	00:46	 624,772k	13,455k	+2.54	1.Nc3-d5+
 32+	00:50	 694,367k	13,641k	+2.72	1.Nc3-d5+
 32	00:52	 718,990k	13,579k	+2.38	1.Nc3-d5+ Ke3-d2 2.Nd5-e7 Bg6-f7 3.Bc2-b1 b6-b5 4.a4xb5 c6xb5 5.g4-g5 b5-b4 6.g5-g6 Bf7-e6 7.Ne7-c6 b4-b3 8.Nc6xe5 Kd2-c3 9.Ne5-f3 Kc3-b2 10.e4-e5 Kb2xb1 11.Nf3-d4 Be6-g8 12.e5-e6 Bg8xe6 13.Nd4xe6 b3-b2 14.Ne6-c5 Kb1-c2 15.g6-g7 b2-b1Q 16.g7-g8Q Qb1-f1 17.Qg8-b3+ Kc2-c1 18.Nc5-d3+ Kc1-d2 19.Qb3-b2+ Kd2-e3 20.Qb2-e5+ Ke3-d2 21.Qe5-a5+ Kd2-c2 22.Qa5-a4+ Kc2-d2 23.Nd3-f4 Qf1-f3 24.Qa4-d4+ Kd2-e1 25.Qd4-b4+ Ke1-d1 26.Nf4xh3
 33+	00:58	 810,379k	13,947k	+2.50	1.Nc3-d5+
 33+	01:03	 889,271k	14,024k	+2.62	1.Nc3-d5+
 33+	02:09	 2,166,003k	16,670k	+4.10	1.Nc3-d5+
 33	02:43	 2,783,850k	17,015k	+4.16	1.Nc3-d5+ Ke3-d4 2.Nd5-e7 Bg6-e8 3.g4-g5 a7-a6 4.Kh2xh3 b6-b5 5.g5-g6 Be8xg6 6.Ne7xg6 c6-c5 7.a4xb5 a6xb5 8.Kh3-g4 c5-c4 9.Kg4-f5 Kd4-c3 10.Bc2-d1 Kc3-d2 11.Kf5xe5 Kd2xd1 12.Ke5-d4 Kd1-d2 13.Ng6-e5 c4-c3 14.Ne5-f3+ Kd2-c2 15.e4-e5 b5-b4 16.e5-e6 b4-b3 17.e6-e7 b3-b2 18.e7-e8Q b2-b1Q 19.Qe8-e2+ Kc2-b3 20.Qe2-b5+ Kb3-a2 21.Qb5-a5+ Ka2-b3 22.Qa5xc3+ Kb3-a4 23.Qc3-c6+ Qb1-b5 24.Qc6-c2+ Qb5-b3 25.Qc2-g2 Qb3-b4+ 26.Kd4-e5 Ka4-b5
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jp
Posts: 1470
Joined: Mon Apr 23, 2018 7:54 am

Re: Fairly difficult EG puzzle

Post by jp »

acase wrote: ↑Fri Apr 03, 2020 7:43 pm Sting-SF 19 finds the key move in 7 seconds on my 20 core dual xeon 2.8GHZ 8GB hash (max for sting)

Sting-sf-19:
28 00:11 84,097k 7,044k +1.29 1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c4 7.Bg6-h5 Kc4-b4 8.Bh5-e8 a7-a6 9.Kh3-g4 b6-b5 10.a4xb5 a6xb5 11.Kg4-f5 Kb4-c4 12.Kf5xe5 b5-b4 13.Be8-g6 b4-b3 14.Ke5-f4 b3-b2 15.Bg6-b1 Kc4-d4 16.Kf4-f3 Kd4-c5 17.Kf3-e3
29 00:12 85,468k 7,076k +1.29 1.Nc3-d5+ c6xd5
<snip>
30 00:31 394,102k 12,606k +1.73 1.Nc3-d5+ Ke3-d2 2.Nd5-e7 Bg6-f7 3.Bc2-b1 b6-b5 4.a4xb5 c6xb5 5.Ne7-c6 Bf7-e8 6.Nc6xe5 Kd2-e3 7.Kh2xh3 Ke3-f4 8.Ne5-d3+ Kf4xe4 9.Nd3-c5+ Ke4-e5 10.Nc5-a6 Be8-d7 11.Kh3-g3 Bd7-c8 12.Na6-b4 Ke5-d6 13.g4-g5 a7-a5 14.Nb4-d3 Bc8-f5 15.Kg3-f4 Bf5-g6 16.Bb1-c2 a5-a4 17.Nd3-b4 Bg6xc2 18.Nb4xc2 Kd6-e7
But Sting does not find the correct 1. ... cxd5 line in 7 seconds. The line it gives at depth 28 just gives a draw. (It may have found it at depth 30, when it switches to 1 ... Kd2 so we don't see its 1 .. cxd5 line.)
Last edited by jp on Fri Apr 03, 2020 9:17 pm, edited 3 times in total.
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Nordlandia
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Location: Sortland, Norway

Re: Fairly difficult EG puzzle

Post by Nordlandia »

[d]1B5k/p3P2p/4bPpP/3p2n1/3p3p/3Pq2P/1p2P1K1/bB6 w - - 0 1

[pgn][Event "New in Chess Magazine"]
[Site "?"]
[Date "2007.??.??"]
[Round "?"]
[White "Timman=J"]
[Black "(+3083.67g2h8)"]
[Result "1-0"]
[SetUp "1"]
[FEN "1B5k/p3P2p/4bPpP/3p2n1/3p3p/3Pq2P/1p2P1K1/bB6 w - - 0 1"]
[PlyCount "23"]
[EventDate "2007.??.??"]

1. e8=Q+ Bg8 2. f7 $1 Nxf7 (2... Qxh3+ 3. Kf2 Qf5+ 4. Ke1 Nxf7 5. Qe7 $1 h3 6.
Bc7 h2 7. Bxh2) 3. Qxe3 dxe3 4. Bh2 $1 (4. Bf4 $2 a5 5. Kf1 a4 6. Ke1 a3 7. Kd1
a2 8. Kc2 g5 9. Bh2 d4) 4... d4 5. Bf4 $1 a6 6. Kg1 $1 g5 7. Bh2 a5 8. Kf1 a4
9. Ke1 a3 10. Kd1 a2 11. Kc2 g4 12. hxg4 1-0[/pgn]
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Fairly difficult EG puzzle

Post by peter »

Nordlandia wrote: ↑Fri Apr 03, 2020 9:13 pm [d]1B5k/p3P2p/4bPpP/3p2n1/3p3p/3Pq2P/1p2P1K1/bB6 w - - 0 1

[pgn][Event "New in Chess Magazine"]
[Site "?"]
[Date "2007.??.??"]
[Round "?"]
[White "Timman=J"]
[Black "(+3083.67g2h8)"]
[Result "1-0"]
[SetUp "1"]
[FEN "1B5k/p3P2p/4bPpP/3p2n1/3p3p/3Pq2P/1p2P1K1/bB6 w - - 0 1"]
[PlyCount "23"]
[EventDate "2007.??.??"]

1. e8=Q+ Bg8 2. f7 $1 Nxf7 (2... Qxh3+ 3. Kf2 Qf5+ 4. Ke1 Nxf7 5. Qe7 $1 h3 6.
Bc7 h2 7. Bxh2) 3. Qxe3 dxe3 4. Bh2 $1 (4. Bf4 $2 a5 5. Kf1 a4 6. Ke1 a3 7. Kd1
a2 8. Kc2 g5 9. Bh2 d4) 4... d4 5. Bf4 $1 a6 6. Kg1 $1 g5 7. Bh2 a5 8. Kf1 a4
9. Ke1 a3 10. Kd1 a2 11. Kc2 g4 12. hxg4 1-0[/pgn]
How to continue after 3...Qe3+ instead of ...Qf5+ (? #9) in the 2...Qxh3+ side line?
1.e8=Q+ Bg8 2.f7 Qxh3+ 3.Kf2 Qe3+
MateFinder can't find anything better than perpetual from there.
Peter.
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acase
Posts: 983
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Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Fairly difficult EG puzzle

Post by acase »

jp wrote: ↑Fri Apr 03, 2020 9:13 pm
acase wrote: ↑Fri Apr 03, 2020 7:43 pm Sting-SF 19 finds the key move in 7 seconds on my 20 core dual xeon 2.8GHZ 8GB hash (max for sting)

Sting-sf-19:
28 00:11 84,097k 7,044k +1.29 1.Nc3-d5+ c6xd5 2.e4xd5 Bg6-e8 3.g4-g5 Ke3-d4 4.g5-g6 Be8xg6 5.Bc2xg6 Kd4xd5 6.Kh2xh3 Kd5-c4 7.Bg6-h5 Kc4-b4 8.Bh5-e8 a7-a6 9.Kh3-g4 b6-b5 10.a4xb5 a6xb5 11.Kg4-f5 Kb4-c4 12.Kf5xe5 b5-b4 13.Be8-g6 b4-b3 14.Ke5-f4 b3-b2 15.Bg6-b1 Kc4-d4 16.Kf4-f3 Kd4-c5 17.Kf3-e3
29 00:12 85,468k 7,076k +1.29 1.Nc3-d5+ c6xd5
<snip>
30 00:31 394,102k 12,606k +1.73 1.Nc3-d5+ Ke3-d2 2.Nd5-e7 Bg6-f7 3.Bc2-b1 b6-b5 4.a4xb5 c6xb5 5.Ne7-c6 Bf7-e8 6.Nc6xe5 Kd2-e3 7.Kh2xh3 Ke3-f4 8.Ne5-d3+ Kf4xe4 9.Nd3-c5+ Ke4-e5 10.Nc5-a6 Be8-d7 11.Kh3-g3 Bd7-c8 12.Na6-b4 Ke5-d6 13.g4-g5 a7-a5 14.Nb4-d3 Bc8-f5 15.Kg3-f4 Bf5-g6 16.Bb1-c2 a5-a4 17.Nd3-b4 Bg6xc2 18.Nb4xc2 Kd6-e7
But Sting does not find the correct 1. ... cxd5 line in 7 seconds. The line it gives at depth 28 just gives a draw. (It may have found it at depth 30, when it switches to 1 ... Kd2 so we don't see its 1 .. cxd5 line.)
That's because it already rejected 1...cxd5 at the 12 second mark as the best defense and instead focused on 1...Ke3-d2
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jp
Posts: 1470
Joined: Mon Apr 23, 2018 7:54 am

Re: Fairly difficult EG puzzle

Post by jp »

acase wrote: ↑Fri Apr 03, 2020 11:25 pm That's because it already rejected 1...cxd5 at the 12 second mark as the best defense and instead focused on 1...Ke3-d2
Do we know that at the 12 second mark? At depth 29, it only gives 1.Nc3-d5+ c6xd5. Does that really mean it's rejected its previous 2nd move? (Clearly at the 31 second mark it has.)

It remains true that Sting claiming +1.29 while giving a drawing line at depth 28 is wrong, though.
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acase
Posts: 983
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Fairly difficult EG puzzle

Post by acase »

jp wrote: ↑Fri Apr 03, 2020 11:40 pm
acase wrote: ↑Fri Apr 03, 2020 11:25 pm That's because it already rejected 1...cxd5 at the 12 second mark as the best defense and instead focused on 1...Ke3-d2
Do we know that at the 12 second mark? At depth 29, it only gives 1.Nc3-d5+ c6xd5. Does that really mean it's rejected its previous 2nd move? (Clearly at the 31 second mark it has.)

It remains true that Sting claiming +1.29 while giving a drawing line at depth 28 is wrong, though.
and it remains true that it still found the key move (Nd5) at the 7 second mark whether the follow up was absolutely correct or not.
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