https://www.stmintz.com/ccc/index.php
I thank Sean for that unselfish endeavor.
Now the position in question:
https://www.stmintz.com/ccc/index.php?id=424110
[d]rn3rk1/p2q1pp1/4p2p/2ppP1NQ/P7/2P1P3/2P3PP/R4RK1 w - - 0 17
Uri Blass, not surprisingly, as Uri is one the top chess analysts in the business, earning an ICCF GM title way before the high end computers and high end chess software were available. Uri was the first to call Rf6 a draw and was probably best move for white. And he also called out that hg5 was black's best response.
Today, SF-McBrain 9.1 ( not yet released) agrees with Uri.
( xboard shows the most recent pv on top, which is more natural to me, ymmv.)
Code: Select all
dep score nodes time (not shown: tbhits knps seldep)
48 0.00 22.0G 15:33.33 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
47 0.00 16.4G 11:42.00 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
46 0.00 14.9G 10:40.79 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
45 0.00 10.6G 7:39.65 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
44 0.00 9.34G 6:46.93 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
43 0.00 8.24G 6:01.28 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
42 0.00 7.38G 5:25.36 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
41 0.00 6.06G 4:30.45 Rf6 hxg5 Raf1 Qb7 R6f3 Nd7 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
40 0.00 4.96G 3:43.79 Rf6 hxg5 Raf1 Qxa4 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
39 0.00 4.82G 3:37.83 Rf6 hxg5 Raf1 Qxa4 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
38 0.00 4.38G 3:19.80 Rf6 hxg5 Raf1 Qxa4 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
37 0.00 3.73G 2:52.24 Rf6 hxg5 Raf1 Qxa4 Rxf7 Rxf7 Qxf7+ Kh7 Qh5+ Kg8 Qf7+
37 -0.02! 3.67G 2:50.09 Rf6!
37 -0.31! 3.54G 2:44.37 Rf6!
37 -0.53! 3.48G 2:41.87 Rf6!
37 -0.69! 3.42G 2:39.09 Rf6!
37 -0.80! 3.38G 2:37.47 Rf6!
37 -0.87! 3.37G 2:37.05 Rf6!
36 -0.95 2.91G 2:15.60 Nh3 Nc6 Nf2 Qe8 e4 Rd8 Rae1 d4 cxd4 cxd4 Ng4 f5 Qxe8 Rdxe8 Nf2 Nxe5 exf5 Rxf5 Re4 Nc6 c3 dxc3 Rc4 Ne7 Rxc3 Rf4 Ra1 Nd5 Rc6 Ref8 Rc2 Rd4 a5 Re8 Re1 Ra4 Nd3 Rxa5 Rce2 Nf6 Rxe6 Rxe6 Rxe6 Ra2
35 -0.97 2.58G 2:00.52 Nh3 Nc6 Nf2 Qe8 e4 Rd8 Rae1 d4 cxd4 cxd4 Ng4 f5 Qxe8 Rdxe8 Nf2 Nxe5 exf5 Rxf5 Re4 Nc6 c3 dxc3 Rc4 Ne7 Rxc3 Rf4 Ra1 Nd5 Rc6 Ref8 Rc2 Rd4 a5 Re8 Re2 Nf6 Rae1 Rd5 Rxe6
35 -0.90! 2.51G 1:56.98 Nh3!
34 -0.98? 2.39G 1:51.29 Nh3 Nc6?
34 -0.82? 2.32G 1:48.18 Nh3 Nc6?
34 -0.67! 2.24G 1:44.45 Nh3!
34 -0.75? 1.91G 1:28.75 Nh3 Nc6?
33 -0.67 1.86G 1:26.48 Nh3 Nc6 Nf2 Qe8 e4 Rd8 Rae1 d4 cxd4 cxd4 Ng4 f5 Nxh6+ gxh6 Qxh6 Rd7 exf5 Rh7 Qxe6+ Qxe6 fxe6 Rxf1+ Rxf1 Rh5 Rf7 Rxe5 Rc7 Rxe6 h4 a6 Kf2 Rf6+ Ke2 Nb4 Rc4 Nc6 Rc5 Rh6 h5 Nb4 Rc4 Nd5 Rxd4 Rxh5 Kd3
33 -0.77! 1.44G 1:06.99 Nh3!
33 -0.92! 1.32G 1:01.65 Nh3!
33 -1.04! 1.29G 1:00.02 Nh3!
33 -1.11! 1.16G 0:54.11 Nh3!
32 -1.19 1.02G 0:47.61 Nf3 Nc6 g4 Qb7 Rfb1 Qa6 g5 g6 Qh4 h5 Rb5 Rab8 c4 Nb4 Ne1 dxc4 Qxc4 Rxb5 Qxb5 Qc8 Qc4 Nd5 e4 Nb6 Qc3 Qc6 Qd3 Nxa4 Nf3 c4 Qd4 a5 h4 Ra8 Nd2 Nc5 Ra3 Qb6 Kh2
32 -1.13! 929.8M 0:43.31 Nf3!
32 -1.25? 915.4M 0:42.64 Nf3 Nc6?
32 -1.10! 830.5M 0:38.68 Nf3!
31 -1.17? 676.8M 0:31.43 Nf3 Nc6?
31 -0.95! 592.8M 0:27.43 Nf3!
31 -1.02! 535.1M 0:24.73 Nf3!
30 -1.10 480.9M 0:22.25 Nf3 Nc6 g4 Qb7 c4 Ne7 Rab1 Qa6 g5 g6 Qg4 h5 Qf4 Rad8 Nd2 Qxa4 cxd5 Qxf4 exf4 Nxd5 Ne4 Ne3 Rf2 Rd4 Nf6+ Kg7 Re1 Nf5 Ra1 Ra8 c3 Rc4 Rfa2 Rxc3 Rxa7
30 -0.95! 413.7M 0:19.18 Nf3!
30 -1.03! 392.0M 0:18.17 Nf3!
29 -1.10 333.8M 0:15.50 Nf3 Nc6 g4 Qb7 c4 Ne7 Rab1 Qa6 g5 g6 Qg4 h5 Qf4 Rad8 Nd2 Nf5 cxd5 exd5 Rf2 Ng7 a5 c4 Nf3 Qxa5 Nd4 Qc7 Rd1 Rde8 Nb5 Qxe5 Nc7 Qxf4 exf4 Rd8 Rxd5 Nf5 Re2 c3 Rxd8 Rxd8 Nb5 Nd4 Nxd4 Rxd4
29 -1.00! 289.9M 0:13.47 Nf3!
28 -1.08 273.9M 0:12.73 Nf3 Nc6 g4 Qb7 c4 Ne7 g5 g6 Qh4 h5 Rfb1 Qc6 cxd5 Nxd5 Qe4 Rab8 Rxb8 Rxb8 Nd2 Qc7 Rf1 Rb2 Rf2 Rb4 c4 Ne7 Qa8+ Rb8 Qf3 Nc6 Ne4 Nxe5 Nf6+ Kh8 Qf4 Rb1+ Rf1 Rb2 Qe4
28 -1.02? 256.2M 0:11.91 Nf3 Nc6?
27 -0.95 246.1M 0:11.44 Nf3 Nc6 g4 Qb7 c4 Ne7 g5 g6 Qh4 h5 Rab1 Qa6 Qf4 Rad8 Nd2 Nf5 cxd5 exd5 Nb3 d4 exd4 Nxd4 Nxd4 Rxd4 Qf3 Rh4 Rb7 Qe6 Rxa7 Qxe5
27 -1.03? 236.3M 0:10.98 Nf3 Nc6?
27 -0.88! 224.1M 0:10.42 Nf3!
26 -0.96 149.7M 0:06.94 Nf3 Nc6 g4 Qb7 c4 Qb2 cxd5 exd5 g5 Qc3 gxh6 Qxe3+ Kg2 Qxh6 Qxh6 gxh6 Rfb1 Nb4 c3 Nd3 Rb7 c4 Nd4 a6 Nf5 Kh7 Rf1 Nc5 Rb6 Rg8+ Kh1 Rg6 Nd6 Nxa4
26 -1.00! 137.6M 0:06.38 Nf3!
25 -1.07 129.2M 0:05.99 Nf3 Nc6 g4 Qb7 Rab1 Qa6 g5 g6 Qg4 h5 Qf4 Rab8 Rxb8 Nxb8 c4 dxc4 Nd2 Qxa4 Qxc4 Qxc4 Nxc4 Nc6 Kf2 Rb8 Ke2 Rb4 Kd3 Ra4 Kc3 a5 Rd1 Kg7
24 -1.07 89.0M 0:04.12 Nf3 Nc6 g4 Qb7 g5 g6 Qh4 h5 Rab1 Qc7 Qf4 Rab8 Rb5 a6 Rxb8 Rxb8 e4 Qd7 Nh4 dxe4 Qxe4 Ne7 Qf4 Nf5 Nxf5 gxf5 Qf3 Rb2 Qxh5 Rxc2 Rd1 Qxa4 g6 Qg4+ Qxg4 fxg4
23 -1.04 73.0M 0:03.37 Nf3 Nc6 g4 Qb7 c4 Qb2 g5 g6 Qh3 h5 cxd5 exd5 Qd7 Nxe5 Qxd5 Nxf3+ Qxf3 Rab8 c4 Qc2 Rac1 Qxa4 Qf4 Rb2 Rf2 Rxf2 Qxf2 Rd8 Qf4 Rd1+ Rxd1 Qxd1+ Kg2
22 -0.97 49.9M 0:02.30 Nf3 Nc6 g4 Qb7 c4 Nb4 g5 g6 Qh4 h5 Rf2 Qa6 Raf1 Nc6 Qf4 Qxc4 Qxc4 dxc4 Nd2 Nxe5 Rf4 Rad8 Nxc4 Ng4 h4
21 -0.96 42.0M 0:01.93 Nf3 Qb7 Rae1 Nc6 e4 Ne7 Nd2 Qb2 exd5 exd5 e6 f6 c4 Qxc2 Qd1 Qxd1 Rxd1 Rfd8 cxd5 Rxd5 Ne4 Re5 Rd7 Rxe4 Rxe7 Rxa4 Rc7
20 -0.62 27.0M 0:01.22 Nf3 Qb7 Rae1 Nc6 e4 Ne7 exd5 Qxd5 Qh4 Qd7 Qc4 Rad8 Qxc5 Rc8 Qd6 Rfd8 Qxd7 Rxd7 Re3 Rc4 Rd3 Rxd3
19 -0.61 24.5M 0:01.10 Nf3 Qb7 Rae1 Nd7 e4 Rab8 exd5 Qxd5 Rd1 Qc6 Qh4 Nb6 Nd2 Qxa4 Ne4 Qxc2 Rd2 Qb3 Qg3 Nd5
18 -0.62 19.5M 0:00.88 Nf3 Qb7 Rae1 Nc6 e4 d4 g4 Qb2 g5 g6 Qxh6 Qxc3 h4 Nxe5 Nxe5 Qg3+ Kh1 Qxe5 h5 Qg7 Qxg7+ Kxg7 h6+ Kh7 Rf2 Rad8 Ref1 Rd7 Rb1
17 -0.77 11.2M 0:00.51 Nf3 Qb7 Rae1 Nd7 e4 Qc6 exd5 exd5 Qf5 Rae8 a5 Re6 Rd1 Rd8 Rfe1 Rde8 Rf1 R6e7 Qf4 Re6 Qd2 Qc7 Qxd5 Nxe5
16 -0.98 7.51M 0:00.34 Nf3 Qb7 Rae1 Nd7 e4 Rab8 exd5 Qxd5 g4 Qa2 Rd1 Nb6 g5 Qxc2 gxh6 Qh7 Qg5 Qxh6 Qxh6
15 -1.06 4.91M 0:00.22 Nf3 Nc6 g4 Qb7 g5 g6 Qh4 h5 e4 Rab8 Qf4 Ne7 Nd2 Qb2 exd5 Nxd5
14 -1.02 1.97M 0:00.09 Nf3 Qb7 e4 dxe4 Nd2 Qd5 Qe2 Nc6 Rae1 Qxe5 Qxe4 Qc7 Rb1 Rab8 Nc4
13 -1.13 662564 0:00.03 Nf3 Nc6 g4 Ne7 g5 g6 Qh4 h5 Qf4 Rab8 Rfb1 Nf5 Rxb8 Rxb8 e4 Ne7 Nh4 Rb2
12 -1.04 591039 0:00.03 Nf3 Nc6 g4 Ne7 g5 g6 Qh4 h5 Qf4 Rab8 Nh4 Nf5 e4 dxe4 Qxe4
11 -1.17 319480 0:00.02 Nf3 Nc6 g4 Ne7 c4 Rab8 g5 g6 Qh3 h5 cxd5 Nxd5 Nd2 Rb4
10 -0.92 141754 0:00.01 Nf3 Qc7 g4 Qa5 c4 Qc3 cxd5 exd5 Rad1 Nc6 Rxd5 Qxc2
9 -1.14 77946 0:00.00 Nf3 Qc7 c4 Nd7 cxd5 exd5 Rfd1 Qc6 g4
8 -1.15 48150 0:00.00 Nf3 Qd8 c4 Nc6 Nd2 Rb8 cxd5 exd5
7 -1.29 18310 0:00.00 Nf3 Nc6 Rab1 Qc7 Rb5 c4 h3
6 -1.32 10251 0:00.00 Nh3 Qc6 a5 Nd7 Nf4 Rab8
5 -1.35 8531 0:00.00 Nh3 Qc6 Nf2 Nd7 c4
4 -1.23 6448 0:00.00 Nh3 Qd8 Nf4 Nd7
3 -0.95 5142 0:00.00 Nh3 Nc6 Nf4
2 -0.70 3717 0:00.00 Nf3 a5
1 -0.50 2276 0:00.00 Nf3
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