Test position

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glorfindel

Test position

Post by glorfindel »

A position from a recent blitz game. Not very difficult for most engines I guess, but some don't seem to find it immediately.
[d]rn3r1k/pp2p1bp/1q1P2b1/6NQ/2Bp4/5N2/PP1B1PP1/R3K3 w Q - 0 17

Complete game:
[Event "FICS rated blitz game"]
[Site "FICS, San Jose, California USA"]
[Date "2009.01.17"]
[Round "-"]
[White "me"]
[Black "barrrabasss"]
[Result "0-1"]
[WhiteElo "1830"]
[BlackElo "1844"]
[ECO "A85"]
[Time "23:57:16"]
[TimeControl "180+0"]
[Mode "ICS"]

1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.h4 Bg7 5.h5 Nxh5 6.Rxh5 gxh5 7.e4 O-O 8.Qxh5
fxe4 9.Nxe4 d5 10.Ng5 Bf5 11.N1f3 c5 12.Be3 Qa5+ 13.Bd2 Qb6 14.cxd5 cxd4
15.d6 Bg6 16.Bc4+ Kh8 17.Qxg6 $3 hxg6 18.O-O-O $1 Bh6 19.dxe7 $2
( 19.Rh1 $1 Kg7 20.Ne6+ Kf7 21.Bxh6 $18 )
19...Rc8 20.Kb1 Qf6 21.Rh1 Kg7 22.Ne6+ Kf7 23.Nd8+ $2
( 23.Nc7+ Kxe7 24.Nd5+ Ke6 25.Nxf6+ Rxc4 26.Rxh6 Kxf6 27.Rh8 $14 )
23...Kxe7 $19 24.Bxh6 Qf5+ 25.Ka1 Rxc4 26.Re1+ Kxd8
{White resigns}
0-1

rn3r1k/pp2p1bp/1q1P2b1/6NQ/2Bp4/5N2/PP1B1PP1/R3K3 w Q - 0 17
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hgm
Posts: 28391
Joined: Fri Mar 10, 2006 10:06 am
Location: Amsterdam
Full name: H G Muller

Re: Test position

Post by hgm »

If you don't specify the side to move, the FEN will not be rendered.
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smrf
Posts: 484
Joined: Mon Mar 13, 2006 11:08 am
Location: Klein-Gerau, Germany

Re: Test position

Post by smrf »

This is, what SMIRF MS-175i has been thinking:
  • 03:54.6 (16.01=) +4.133 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rc8 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.Nc5+ Kg7
    03:48.8 (16.01+) +3.938 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rc8 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.Nc5+ Kg7
    01:05.6 (15.01=) +3.494 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rc8 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.Nc7+ Kg7
    00:31.2 (14.01=) +3.494 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rc8 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.Nc7+ Kg7
    00:12.8 (13.01=) +3.365 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rxf3 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.gxf3 Qxd6
    00:11.7 (12.01=) +3.322 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Qc6 22.Rxg6+ Kh8 23.Rh6+ Kg8 24.Nc5+ Qd5
    00:11.5 (12.01+) +2.514 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kf6 21.Rxh6 Nc6 22.Bg5+ Kf5 23.Nxf8 Qxb2+ 24.Kxb2 Rxf8
    00:03.6 (11.01=) +2.070 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kf6 21.Rxh6 Nc6 22.Nxf8 Rxf8 23.Bg5+ Kf5 24.dxe7 Nxe7
    00:03.4 (10.01=) +2.117 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Kg7 20.Ne6+ Kg8 21.Rxh6 Rc8 22.Rxg6+ Kh7 23.Rh6+ Kg8 24.Nc5+ e6
    00:03.3 (10.01+) +0.803 17.Qxg6 (=/=) hxg6 18.O-O-O Bh6 19.Rh1 Qxb2+ 20.Kxb2 Rxf3 21.gxf3 exd6
    00:03.2 (10.01+) -0.529 17.Qxg6 (=/=) hxg6 18.dxe7 Qxb2 19.exf8=R+ Bxf8 20.Nf7+ Kg7 21.Bh6+ Kg8 22.N7g5+ Kh8 23.Nf7+ Kh7 24.N3g5+ Kg8
    00:01.5 (09.01=) -0.973 17.Qxg6 (=/=) hxg6 18.dxe7 Qxb2 19.exf8=R+ Bxf8 20.Nf7+ Kg7 21.Bh6+ Kg8 22.N7g5+ Kh8 23.Nf7+ Kh7 24.N3g5+ Kg8
    00:00.7 (08.01=) -0.760 17.Qxg6 (Qh2) hxg6 18.dxe7 Nc6 19.exf8=R+ Rxf8 20.Nf7+ Rxf7 21.Bxf7 Qxb2 22.Rc1 d3 23.Bxg6 Qxc1+ 24.Bxc1 Bc3+
    00:00.2 (07.01=) -0.680 17.Qxg6 (Qh2) hxg6 18.dxe7 Nc6 19.exf8=B Rxf8 20.Nxd4 Bxd4 21.Nf7+ Rxf7 22.Bxf7
    00:00.2 (06.07=) -0.680 17.Qxg6 (Qh2) hxg6 18.dxe7 Nc6 19.exf8=B Rxf8 20.Nf7+ Rxf7 21.Bxf7 Qxb2 22.Nxd4 Bxd4 23.Bxg6
    00:00.1 (06.01=) -2.598 17.Qh2 (dxe7) exd6 18.Rc1 Nc6 19.Ne6 d5
    00:00.0 (04.06=) -2.119 17.Qh2 (Qh3) exd6 18.Rd1 Re8+ 19.Be6 h6
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Will Singleton
Posts: 128
Joined: Thu Mar 09, 2006 5:14 pm
Location: Los Angeles, CA

Re: Test position

Post by Will Singleton »

That's a nice one, most programs take some time to solve it due to pruning after the queen sac. You likely played it speculatively, since you forgot to play Rh1.
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Cyclone 3.0

Post by kgburcham »

[d] rn3r1k/pp2p1bp/1q1P2b1/6NQ/2Bp4/5N2/PP1B1PP1/R3K3 w Q -

Cyclone 3.0

13/50 0:07 +2.44 1.Qxg6 hxg6 2.O-O-O e6 3.Rh1+ Kg8 4.Bxe6+ Rf7 5.Bxf7+ Kf8 6.Bb3 Qxd6 7.Ne6+ Ke8 8.Nxg7+ Kd7 9.Ne6 Nc6 10.Rh7+ Ne7 11.Nexd4 a6 12.Kb1 b5 13.Be6+ Kc7 (7.163.834) 3645
14/50 0:11 +2.44 1.Qxg6 hxg6 2.O-O-O e6 3.Rh1+ Kg8 4.Bxe6+ Rf7 5.Bxf7+ Kf8 6.Bb3 Qxd6 7.Ne6+ Ke8 8.Nxg7+ Kd7 9.Ne6 Nc6 10.Rh7+ Ne7 11.Nexd4 a6 12.Kb1 b5 13.Be6+ Kc7 (10.792.857) 3661
15/58 0:27 +2.24 1.Qxg6 hxg6 2.O-O-O Bh6 3.Rh1 Kg7 4.Ne6+ Kf7 5.Bxh6 Qxd6 6.Bxf8 Ke8 7.Rh8 Kd7 8.Bh6 Qb4 9.Ne5+ Kd6 10.Bf4 Na6 11.Rxa8 Qe1+ 12.Kc2 Qxf2+ 13.Kb1 (25.712.862) 3708
16/58 0:37 +1.39 1.Qxg6 hxg6 2.O-O-O Bh6 3.Rh1 Kg7 4.Ne6+ Kf7 5.Bxh6 Nd7 6.Nfg5+ Ke8 7.Nc7+ Kd8 8.Nd5 Qxd6 9.Bxf8 Ke8 10.Bxe7 Qe5 11.Nf3 Qg7 12.Kb1 (35.185.741) 3779
17/58 1:43 +2.37 1.Qxg6 hxg6 2.O-O-O Bh6 3.Rh1 Kg7 4.Ne6+ Kf7 5.Bxh6 Nd7 6.Nfg5+ Ke8 7.Nc7+ Kd8 8.Nd5 Qxd6 9.Bxf8 Nxf8 10.Nf7+ Kd7 11.Bb5+ Ke6 12.Nxd6 Kxd6 13.Nf4 e5 14.Nd3 (95.577.321) 3688
18/64 4:27 +3.72 1.Qxg6 hxg6 2.O-O-O Bh6 3.Rh1 Kg7 4.Ne6+ Kf7 5.Nc7+ Kf6 6.Nd5+ Ke6 7.Nxb6+ Kxd6 8.Bxh6 Rxf3 9.Nxa8 Rxf2 10.Rd1 e5 11.Rd2 Rxd2 12.Bf8+ Kc6 13.Kxd2 e4 14.a4 (250.091.182) 3743
best move: Qh5xg6 time: 5:29.594 min n/s: 3.736.901 nodes: 1.231.660.000
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glorfindel

Re: Test position

Post by glorfindel »

Yes, perhaps you are right that some engines might prune the sacrifice and this is what delays them. Because there are other engines that find it in 2 seconds, so it is not very deep. I have a very strong engine here using two threads that needs 30 sec to play Qxg6.

I did not forget to play Rh1, this was my initial plan, but then I saw dxe7 could be played with tempo and so I was diverted. It turned out to lose a tempo, because Black played ...Rc8. Anyway, this is a blitz game, so by definition it is speculative, and it cannot really stand to be analyzed seriously.
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rightrook
Posts: 1452
Joined: Wed Mar 08, 2006 8:45 pm

Re: Test position

Post by rightrook »

Good test.........Thanks...!

Hiarcs 11.2 finds Qxg6 right away...and keeps it there.

Ruffian also finds it quickly but soon changes to Qh3....

regards

Robert
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Dann Corbit
Posts: 12792
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Test position

Post by Dann Corbit »

Rybka

Code: Select all

    Searching move: 
    Best move (Rybka 3): Qh5xg6
    Not found in: 10:00
      2	00:00	         388	397.312	-1.37	Qh5h3
      2	00:00	         682	698.368	-1.02	Qh5h2
      3	00:00	       1.019	1.043.456	-1.37	Qh5h2
      4	00:00	       1.733	1.774.592	-1.25	Qh5h2
      4	00:00	       1.994	2.041.856	-1.22	Qh5h4
      5	00:00	       3.644	219.497	-1.46	Qh5h2 Qb6xd6
      6	00:00	       6.354	197.166	-1.37	Qh5h2 Qb6xd6 Qh2xd6 e7xd6 Nf3h4 Bg6h5
      6+	00:00	       9.364	199.765	-1.26	Qh5g4
      6	00:00	      11.512	245.589	-1.08	Qh5g4 Qb6xd6 Ng5e6
      6+	00:00	      11.518	184.288	-1.06	Qh5h3 Qb6xd6
      6	00:00	      14.340	229.440	-0.95	Qh5h3 e7xd6 Ra1c1
      7	00:00	      27.645	180.308	-0.89	Qh5h3 Qb6xd6 Nf3h4 Bg6c2 Ng5f7+ Rf8xf7
      8	00:00	      44.580	194.254	-1.08	Qh5h3 Qb6xb2 Ra1c1 Nb8c6
      8	00:00	      65.866	172.498	-1.06	Qh5g4 Qb6xb2 Ra1c1 Nb8c6 d6d7 Bg7h6 Qg4h4
      8+	00:00	      66.437	173.993	-0.49	Qh5xg6
      8+	00:00	     127.260	181.243	+2.51	Qh5xg6
      8	00:00	     145.892	183.755	+2.79	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+
      9	00:01	     185.226	189.671	+2.78	Qh5xg6 h7xg6 OOO e7e6 Rd1h1+ Kh8g8 Bc4xe6+ Rf8f7
     10+	00:01	     229.189	190.186	+2.98	Qh5xg6
     10	00:01	     292.521	197.717	+3.15	Qh5xg6 h7xg6 OOO e7e6 Rd1h1+ Kh8g8 Bc4xe6+ Rf8f7 Be6xf7+ Kg8f8 Bf7c4 Qb6xd6 Ng5e6+ Kf8g8 Ne6xd4+ Kg8f8 Nd4e6+ Kf8g8 Ne6c7+ Kg8f8 Rh1e1 Nb8c6 Nc7e6+ Kf8e8 Ne6xg7+ Ke8d7 Re1d1 Kd7c8
     11+	00:03	     850.776	238.552	+3.35	Qh5xg6 h7xg6
     11	00:05	   1.422.154	248.216	+4.07	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1d1 Kd6c5 Bc4f1 e7e5 Na8c7
     12	00:06	   1.518.612	242.485	+4.07	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1d1 Kd6c5 Bc4f1 e7e5 Na8c7
     13+	00:09	   2.184.820	237.022	+4.27	Qh5xg6 h7xg6
     13	00:10	   2.465.718	240.810	+4.27	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1d1 Kd6c5 Bc4d3
     14+	00:15	   3.252.450	221.679	+4.47	Qh5xg6
     14	00:17	   3.859.428	224.179	+4.48	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1e1 Nb8c6 Re1e2 Rf2f1+ Kc1d2 Rf1h1
     15	00:24	   5.488.352	228.579	+4.48	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1e1 Nb8c6 Re1e2 Rf2f1+ Kc1d2 Rf1h1
     16	00:42	   9.725.218	236.687	+4.53	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1e1 Nb8c6 Re1e2 Rf2f1+ Kc1d2 Rf1h1 Bh6f8 Rh1b1 Kd2c2 Rb1h1 Re2e6+ Kd6c5 Bc4e2
     17	01:23	  19.460.446	238.051	+4.64	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1e1 e7e5 Re1e2 Rf2f5 Kc1d2 Nb8d7 g2g4 Rf5f3 g4g5 Nd7c5 Bh6g7 Rf3f5 Bg7f6
     18	03:39	  57.799.035	270.146	+4.76	Qh5xg6 h7xg6 OOO Bg7h6 Rd1h1 Kh8g7 Ng5e6+ Kg7f7 Ne6c7+ Kf7f6 Nc7d5+ Kf6e6 Nd5xb6+ Ke6xd6 Bd2xh6 Rf8xf3 Nb6xa8 Rf3xf2 Rh1e1 Nb8c6 Re1e2 Rf2f1+ Kc1d2 Rf1h1 Bh6f8 Rh1b1
     19+	07:06	 103.679.362	249.087	+4.96	Qh5xg6
   1/19/2009 6:25:01 PM, Time for this analysis: 00:10:00, Rated time: 10:16
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