STS (v7.0) - "Offer of Simplification"

[Dann Corbit]

Try this:
http://cap.connx.com/epd/sts.zip

[beachknight]

Try this:
http://cap.connx.com/epd/sts.zip

Thanks, SuperDann!

Best,

[Jan Brouwer]

Rotor 0.5 at 10 s / 1.3 GHz CeleronM: 61/100

Jan

[JVMerlino]

Thanks again for another very useful test! I've been considering putting in code to recognize simplification (at least a very simple ratio of material), so this is very timely.

My latest version of Myrddin got 40 positions correct, and 560 points.

My goal is to make Myrddin average 60 correct solutions and 700 points per test suite. Including this new one, Myrddin's only averaging 49 solutions and 618 points -- so still some work to go.

Thanks again!

jm

[swami]

Try this:
http://cap.connx.com/epd/sts.zip

Excellent - Neatly Organized!

[swami]

Thanks again for another very useful test! I've been considering putting in code to recognize simplification (at least a very simple ratio of material), so this is very timely.

My latest version of Myrddin got 40 positions correct, and 560 points.

My goal is to make Myrddin average 60 correct solutions and 700 points per test suite. Including this new one, Myrddin's only averaging 49 solutions and 618 points -- so still some work to go.

Thanks again!

jm

You're welcome. I hope you enjoy the test suites a great deal.

I'm looking forward to Myrddin's progress. I believe recent versions have shown signs of improvement. 618 points out of 1000 average is obviously good.

[Eelco de Groot]

Thanks for posting the results, guys!

Keep 'em coming!

Hello Swami,

This position searched a bit deeper by Rainbow Serpent seems to turn up Bb2=5 as at least an alternative solution:

[d]1r2r1k1/5pp1/R2p3n/3P1P1p/2p2PP1/1qb2B1P/Q7/2BR1K2 b - - bm Bd2; id "STS(v7.0) Simplification.009"; c0 "Bd2=10, Bb2=5, Bb4=5, hxg4=3";

1r2r1k1/5pp1/R2p3n/3P1P1p/2p2PP1/1qb2B1P/Q7/2BR1K2 b - -

Engine: Rainbow Serpent 1.5 Build 004 (Athlon 2009 MHz, 128 MB)
by Romstad, Costalba, Kiiski, De Groot

7.01 0:11 +0.76 1...hxg4 2.hxg4 Qxa2 3.Rxa2 Bb4
4.Kg2 c3 5.Ra7 (31.483) 2

7.38 0:11 +1.05++ 1...Bd4 2.Qxb3 Rxb3 3.Be2 Rxh3
4.Rxd4 Rh1+ (62.255) 5

8.01 0:11 +1.09 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 hxg4 5.hxg4 Rc3 6.Bd2 Re2+
7.Kf1 (75.174) 6

9.01 0:11 +1.09 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 hxg4 5.hxg4 Rc3 6.Bd2 Re2+
7.Kf1 (110.148) 9

10.01 0:11 +1.29++ 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 Rc3 5.Bd2 Rb3 6.Rxd6 c3 (179.605) 15

11.01 0:11 +0.88 1...Bd4 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Re3 5.Kf2 Bb6 6.Bc1 Re8+
7.Kg3 c3 8.Ba3 hxg4 9.hxg4 (350.908) 29

12.01 0:13 +0.92 1...Bd4 2.Ra3 Qb4 3.Qd2 Qxd2 4.Bxd2 Rb2
5.Be1 Re3 6.Ra8+ Kh7 7.Bg2 Rbe2
8.Bf3 (1.112.342) 80

13.01 0:17 +0.72 1...Bd4 2.Ra3 Qb4 3.Qd2 Bc5 4.Qxb4 Bxb4
5.Re3 Kf8 6.Rd4 Rxe3 7.Bxe3 Bc5
8.Re4 Bxe3 9.Rxe3 hxg4 10.hxg4 (2.731.341) 156

13.02 0:18 +0.88 1...Ba5 2.Qxb3 Rxb3 3.Be2 Bb4 4.Rb6 Re4
5.Rb8+ Kh7 6.Rb6 hxg4 7.hxg4 Bc5
8.Rxb3 cxb3 9.Ke1 (3.036.859) 167

14.01 0:24 +0.72 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb4 4.Ra2 c3
5.Rc2 Ba5 6.Rd3 hxg4 7.hxg4 Kf8
8.Kg3 Rb1 (5.998.159) 242

15.01 0:44 +0.56 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb4 4.Ra2 c3
5.Rc2 Kf8 6.Kg3 Ng8 7.Rd3 hxg4
8.hxg4 Nf6 9.Re3 (14.549.471) 328

16.01 1:59 +0.52 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb6 4.Ra2 c3
5.Rd3 Rc8 6.Rc2 hxg4 7.hxg4 Kf8
8.Kg3 Ke7 9.Rd1 Bc5 10.Re1+ Kf6 (47.109.943) 395

16.04 2:31 +0.56 1...Bd2 2.Kg2 Re3 3.Qxd2 Rxf3 4.Ra3 Rd3
5.Rxb3 Rxd2+ 6.Rxd2 Rxb3 7.Rc2 hxg4
8.hxg4 Nxg4 9.Rxc4 Nf6 10.Rc8+ Kh7
11.Rc7 Nxd5 12.Rxf7 (61.190.930) 404

17.01 3:32 +0.56 1...Bd2 2.Kg2 Re3 3.Qxd2 Rxf3 4.Ra3 Rd3
5.Rxb3 Rxd2+ 6.Rxd2 Rxb3 7.Rc2 hxg4
8.hxg4 Nxg4 9.Rxc4 Nf6 10.Rc8+ Kh7
11.Rc7 Nxd5 12.Rxf7 (87.688.699) 412

18.01 6:07 +0.76++ 1...Bd2 (156.205.105) 424

19.01 7:31 +1.09 1...Bd2 2.Kg2 Bxc1 3.Qxb3 Rxb3
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rxd6 h4+
7.Kxh4 Rxf3 8.Rxc4 Kh7 9.f6 g6
10.Ra6 Rh2 11.Kg5 Rfxh3 12.f5 gxf5
13.gxf5 Rh5+ 14.Kf4 Nxf5 (200.030.486) 442

20.01 10:14 +1.13 1...Bd2 2.Kg2 Bxc1 3.Qxb3 Rxb3
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3 7.Rc6 Kh7
8.f6 gxf6 9.f5 c2 10.Rf2 Nxg4
11.Rcxc2 Nxf2 12.Rxb2 Nxh3 13.Rh2 h4+
14.Kg4 (280.549.827) 456

21.01 16:47 +0.92-- 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Bxf4 5.Rd4 Re3 6.Rxf4 Rxa3
7.gxh5 Ra1+ 8.Ke2 c3 9.Kd3 (484.738.606) 481

22.01 31:14 +0.92 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Bxf4 5.Rd4 Re3 6.Rxf4 Rxa3
7.gxh5 f6 8.Ke2 Ra4 9.Be4 Ra2+
10.Ke3 Nf7 11.Kd4 Ne5 12.Rf1 Ra3
13.h4 Kf7 14.Rb1 (913.146.080) 487

23.01 55:39 +0.32 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Bxc1
4.Rxb3 cxb3 5.Rxc1 b2 6.Rb1 Rb8
7.Kf2 Rb3 8.Ke2 f6 9.gxh5 Nxf5
10.Bg4 Ng3+ 11.Kd2 f5 12.Kc2 Rb4
13.Bd1 Rc4+ 14.Kxb2 Kf7 (1.639.448.693) 490

23.07 137:37 +0.84 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 h4+ 11.Kg2 Ng8 12.g5 g6
13.fxg6+ fxg6 14.Rb1 Ne7 (3.457.727.060) 418

24.01 173:47 +0.84 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 hxg4 11.hxg4 Nxg4 12.Rxd2 cxd2
13.Rh1+ Nh6 14.Kf2 Kg8 (4.433.885.890) 425

25.01 266:40 +0.92 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 hxg4 11.hxg4 Nxg4 12.Rxd2 cxd2
13.Rh1+ Nh6 14.Kf2 Kg8 (6.901.866.922) 431

26.01 385:11 +1.13++ 1...Bb2 (10.035.588.937) 434

best move: Bc3-b2 time: 486:18.390 min n/s: 422.747 nodes: 12.334.890.260

[yanquis1972]

Deep Shredder 12 UCI 4CPU 10s/move 84/100

[swami]

Hi Eelco, I'll see if Bb2 qualifies as alternative solution on par with Bd2.

Few engines that I have tried says Bd2 is ultimate solution. I'll see what Dann has to say on this. I believe he had run Rybka, Naum and Zapchess to see if they all agree in unison after significant amount of time.

[Dann Corbit]

Thanks for posting the results, guys!

Keep 'em coming!

Hello Swami,

This position searched a bit deeper by Rainbow Serpent seems to turn up Bb2=5 as at least an alternative solution:

[d]1r2r1k1/5pp1/R2p3n/3P1P1p/2p2PP1/1qb2B1P/Q7/2BR1K2 b - - bm Bd2; id "STS(v7.0) Simplification.009"; c0 "Bd2=10, Bb2=5, Bb4=5, hxg4=3";

1r2r1k1/5pp1/R2p3n/3P1P1p/2p2PP1/1qb2B1P/Q7/2BR1K2 b - -

Engine: Rainbow Serpent 1.5 Build 004 (Athlon 2009 MHz, 128 MB)
by Romstad, Costalba, Kiiski, De Groot

7.01 0:11 +0.76 1...hxg4 2.hxg4 Qxa2 3.Rxa2 Bb4
4.Kg2 c3 5.Ra7 (31.483) 2

7.38 0:11 +1.05++ 1...Bd4 2.Qxb3 Rxb3 3.Be2 Rxh3
4.Rxd4 Rh1+ (62.255) 5

8.01 0:11 +1.09 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 hxg4 5.hxg4 Rc3 6.Bd2 Re2+
7.Kf1 (75.174) 6

9.01 0:11 +1.09 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 hxg4 5.hxg4 Rc3 6.Bd2 Re2+
7.Kf1 (110.148) 9

10.01 0:11 +1.29++ 1...Bd4 2.Qxb3 Rxb3 3.Rxd4 Rxf3+
4.Kg2 Rc3 5.Bd2 Rb3 6.Rxd6 c3 (179.605) 15

11.01 0:11 +0.88 1...Bd4 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Re3 5.Kf2 Bb6 6.Bc1 Re8+
7.Kg3 c3 8.Ba3 hxg4 9.hxg4 (350.908) 29

12.01 0:13 +0.92 1...Bd4 2.Ra3 Qb4 3.Qd2 Qxd2 4.Bxd2 Rb2
5.Be1 Re3 6.Ra8+ Kh7 7.Bg2 Rbe2
8.Bf3 (1.112.342) 80

13.01 0:17 +0.72 1...Bd4 2.Ra3 Qb4 3.Qd2 Bc5 4.Qxb4 Bxb4
5.Re3 Kf8 6.Rd4 Rxe3 7.Bxe3 Bc5
8.Re4 Bxe3 9.Rxe3 hxg4 10.hxg4 (2.731.341) 156

13.02 0:18 +0.88 1...Ba5 2.Qxb3 Rxb3 3.Be2 Bb4 4.Rb6 Re4
5.Rb8+ Kh7 6.Rb6 hxg4 7.hxg4 Bc5
8.Rxb3 cxb3 9.Ke1 (3.036.859) 167

14.01 0:24 +0.72 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb4 4.Ra2 c3
5.Rc2 Ba5 6.Rd3 hxg4 7.hxg4 Kf8
8.Kg3 Rb1 (5.998.159) 242

15.01 0:44 +0.56 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb4 4.Ra2 c3
5.Rc2 Kf8 6.Kg3 Ng8 7.Rd3 hxg4
8.hxg4 Nf6 9.Re3 (14.549.471) 328

16.01 1:59 +0.52 1...Ba5 2.Qxb3 Rxb3 3.Kg2 Bb6 4.Ra2 c3
5.Rd3 Rc8 6.Rc2 hxg4 7.hxg4 Kf8
8.Kg3 Ke7 9.Rd1 Bc5 10.Re1+ Kf6 (47.109.943) 395

16.04 2:31 +0.56 1...Bd2 2.Kg2 Re3 3.Qxd2 Rxf3 4.Ra3 Rd3
5.Rxb3 Rxd2+ 6.Rxd2 Rxb3 7.Rc2 hxg4
8.hxg4 Nxg4 9.Rxc4 Nf6 10.Rc8+ Kh7
11.Rc7 Nxd5 12.Rxf7 (61.190.930) 404

17.01 3:32 +0.56 1...Bd2 2.Kg2 Re3 3.Qxd2 Rxf3 4.Ra3 Rd3
5.Rxb3 Rxd2+ 6.Rxd2 Rxb3 7.Rc2 hxg4
8.hxg4 Nxg4 9.Rxc4 Nf6 10.Rc8+ Kh7
11.Rc7 Nxd5 12.Rxf7 (87.688.699) 412

18.01 6:07 +0.76++ 1...Bd2 (156.205.105) 424

19.01 7:31 +1.09 1...Bd2 2.Kg2 Bxc1 3.Qxb3 Rxb3
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rxd6 h4+
7.Kxh4 Rxf3 8.Rxc4 Kh7 9.f6 g6
10.Ra6 Rh2 11.Kg5 Rfxh3 12.f5 gxf5
13.gxf5 Rh5+ 14.Kf4 Nxf5 (200.030.486) 442

20.01 10:14 +1.13 1...Bd2 2.Kg2 Bxc1 3.Qxb3 Rxb3
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3 7.Rc6 Kh7
8.f6 gxf6 9.f5 c2 10.Rf2 Nxg4
11.Rcxc2 Nxf2 12.Rxb2 Nxh3 13.Rh2 h4+
14.Kg4 (280.549.827) 456

21.01 16:47 +0.92-- 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Bxf4 5.Rd4 Re3 6.Rxf4 Rxa3
7.gxh5 Ra1+ 8.Ke2 c3 9.Kd3 (484.738.606) 481

22.01 31:14 +0.92 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Rxa3
4.Bxa3 Bxf4 5.Rd4 Re3 6.Rxf4 Rxa3
7.gxh5 f6 8.Ke2 Ra4 9.Be4 Ra2+
10.Ke3 Nf7 11.Kd4 Ne5 12.Rf1 Ra3
13.h4 Kf7 14.Rb1 (913.146.080) 487

23.01 55:39 +0.32 1...Bd2 2.Qxb3 Rxb3 3.Ra3 Bxc1
4.Rxb3 cxb3 5.Rxc1 b2 6.Rb1 Rb8
7.Kf2 Rb3 8.Ke2 f6 9.gxh5 Nxf5
10.Bg4 Ng3+ 11.Kd2 f5 12.Kc2 Rb4
13.Bd1 Rc4+ 14.Kxb2 Kf7 (1.639.448.693) 490

23.07 137:37 +0.84 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 h4+ 11.Kg2 Ng8 12.g5 g6
13.fxg6+ fxg6 14.Rb1 Ne7 (3.457.727.060) 418

24.01 173:47 +0.84 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 hxg4 11.hxg4 Nxg4 12.Rxd2 cxd2
13.Rh1+ Nh6 14.Kf2 Kg8 (4.433.885.890) 425

25.01 266:40 +0.92 1...Bb2 2.Qxb3 Rxb3 3.Kf2 Bxc1
4.Rxc1 Rb2+ 5.Kg3 Re3 6.Rf1 c3
7.Ra8+ Kh7 8.Raa1 Rd2 9.Rae1 Red3
10.Rf2 hxg4 11.hxg4 Nxg4 12.Rxd2 cxd2
13.Rh1+ Nh6 14.Kf2 Kg8 (6.901.866.922) 431

26.01 385:11 +1.13++ 1...Bb2 (10.035.588.937) 434

best move: Bc3-b2 time: 486:18.390 min n/s: 422.747 nodes: 12.334.890.260

This is some interesting analysis, and I will look into it. Since the key idea remains valid (offer of simplification) it may be an excellent alternative. The score also seems similar to the value I have stored for the key move.