True Legend

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Rebel, chrisw

Maharadja
Posts: 78
Joined: Thu Dec 24, 2009 1:22 pm

Re: True Legend

Post by Maharadja »

Yes, get his name, this game deserves to be submitted to chessgames.com.

He played very well even though he missed the win.
I got the name of the legend: Duppi (=nick on playchess)
his rating was 1990 when he played his immortal game
Last edited by Maharadja on Tue Mar 01, 2011 8:52 pm, edited 1 time in total.
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Maharadja
Posts: 78
Joined: Thu Dec 24, 2009 1:22 pm

Re: True Legend

Post by Maharadja »

Thanks for sharing this! Very amusing Too bad that the player didn't find the win. It was probably a "once in a lifetime" chance. But the draw against F11 under these circumstances is very good too.

It is also nice to see what would happen after 22...Kg6:

23.Nh4+ Kh7 24.Qh5+ Kg8 25.Qh8+! Kxh8 26.Ng6+ Kg8 27.Rh8#

[D]1r3rkR/3bbpp1/1qn2PN1/p2pP1P1/3P4/2P5/6K1/qNB5 b - - 0 27
wow coooool. thanx for this line.
most of time we (=me) concentrate only on the mainline the engine gives while most of time the most beautifull line is not the mainline
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Tom Barrister
Posts: 227
Joined: Tue Oct 05, 2010 5:29 pm

Re: True Legend

Post by Tom Barrister »

Terry McCracken wrote:[ I can force mate. Don't believe me? We'll play it out. It's easy.
You can force mate because White has a win, but with correct defense, it won't happen before move 50, and maybe not before move 70.

Here is the position after 26 ... Qbb2+

[D] 1r3rk1/3bb1p1/1qn2Pp1/p2pP1N1/3P4/2P5/6K1/qNB4Q b - - 1 26

White has only one good line:

27 Bxb2

Other moves lose.

27 Nd2 Qxd2+, 28 Bxd2 (else 28...Qxg5) Qxh1.

27 Bd2 Qxd2+ 28 Nxd2 (else 28 ... Qxg5) Qxh1.

27 Kg2 Qxc1+ followed by Qxg5.

27 Kf1 Qxc1+ followed by Qxg5.

27 Kg3 Qc3+, 28 Nxc3 (28 Kg2 Rb2+ mates quickly) Qxc3+, 29 Kg2 Qc2+, 30 Kg3 Rb3+ and White will soon be mated or be forced to move the Knight or Queen away from the mating pattern.

29 Kf3 Qc3+ (yes, I know the engine has a line faster by a move), 30 Be3 (the only move that differs from the previous note) Qxe3+!, 31 Kxe3 Qxd4+, and Black will bring in the Rook next move with check and mate soon after.


27 ... Qxb2+
28 Kg3

Again, other moves lose, i.e. 28 Kf3 Rxf6+!

28 ... Qf2+
29 Kxf2 Rxf6+
30 exf6 Bxf6

Black has extricated himself from the mating net, but at the cost of both Queens, a Rook, and soon a Bishop and pawn:

31 Qxd5+ Kh8
32 Nf7+ Kh7
33 Qxd7

The smoke has cleared, and White is up a Queen for a Rook and pawn.
This production is being brought to you by Rybka: "The engine made from scratch.™"
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Maharadja
Posts: 78
Joined: Thu Dec 24, 2009 1:22 pm

Re: True Legend

Post by Maharadja »

By the way, i said it was fritz 11, but i think i'm wrong because the latest fritz is actually 12. And i suppose that the fritz who plays in the main room is he latest fritz thus deep fritz 12.
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: True Legend

Post by Terry McCracken »

Paloma wrote:

Code: Select all

Try not capturing with the Bishop. Try Nd2 instead.
What?? 27.Nd2 Qxd2 28.Bxd2 Qxh1 and white lost his Queen!![/code]
Sorry, hadn't time to read your line. I'm going to take a look. Maybe Black can force it beyond ten moves. It's tricky when the losing side can throw everything at you including the kitchen sink.

People tend to prune those moves automatically. I do at least.
Terry McCracken
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: True Legend

Post by Terry McCracken »

Tom Barrister wrote:
Terry McCracken wrote:[ I can force mate. Don't believe me? We'll play it out. It's easy.
You can force mate because White has a win, but with correct defense, it won't happen before move 50, and maybe not before move 70.

Here is the position after 26 ... Qbb2+

[D] 1r3rk1/3bb1p1/1qn2Pp1/p2pP1N1/3P4/2P5/6K1/qNB4Q b - - 1 26

White has only one good line:

27 Bxb2

Other moves lose.

27 Nd2 Qxd2+, 28 Bxd2 (else 28...Qxg5) Qxh1.

27 Bd2 Qxd2+ 28 Nxd2 (else 28 ... Qxg5) Qxh1.

27 Kg2 Qxc1+ followed by Qxg5.

27 Kf1 Qxc1+ followed by Qxg5.

27 Kg3 Qc3+, 28 Nxc3 (28 Kg2 Rb2+ mates quickly) Qxc3+, 29 Kg2 Qc2+, 30 Kg3 Rb3+ and White will soon be mated or be forced to move the Knight or Queen away from the mating pattern.

29 Kf3 Qc3+ (yes, I know the engine has a line faster by a move), 30 Be3 (the only move that differs from the previous note) Qxe3+!, 31 Kxe3 Qxd4+, and Black will bring in the Rook next move with check and mate soon after.


27 ... Qxb2+
28 Kg3

Again, other moves lose, i.e. 28 Kf3 Rxf6+!

28 ... Qf2+
29 Kxf2 Rxf6+
30 exf6 Bxf6

Black has extricated himself from the mating net, but at the cost of both Queens, a Rook, and soon a Bishop and pawn:

31 Qxd5+ Kh8
32 Nf7+ Kh7
33 Qxd7

The smoke has cleared, and White is up a Queen for a Rook and pawn.

Yes, I looked at the wrong line. I didn't comb through it with a computer.

I've looked at it again briefly and see where I went wrong. There's no immediate mate. My mistake.
Terry McCracken
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Robert Flesher
Posts: 1280
Joined: Tue Aug 18, 2009 3:06 am

Re: True Legend

Post by Robert Flesher »

M ANSARI wrote:Engines are actually very good in these type of positions. Of course an extra queen can skew things for a while, but it doesn't take long for an engine to see the sac. But 5 minutes on fast hardware and R4.1 sees no mate.


New game
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - 0 1

Analysis by Rybka 4.1 RC 2:

1.Qc2 g6 2.fxe7 Nxe7 3.Na3 Bf5 4.c4 Bxd3 5.Qxd3 Qb3 6.Qd2 dxc4
-+ (-9.69) Depth: 6 00:00:00 8kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qd8 4.Qf3 Nf5 5.Kg1
-+ (-9.35) Depth: 6 00:00:00 20kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qd8 4.Ba3 Qa2 5.Kg1 Bb5 6.Rd6
-+ (-9.37) Depth: 7 00:00:00 29kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qd8 4.Ba3 Qa2 5.Qe2 Re8 6.c4 Be6
-+ (-9.39) Depth: 8 00:00:00 59kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qb7 4.Ba6 Nf5 5.Qe1 Qc7 6.Ba3 Rfe8 7.Bd3 Qcxc3 8.Bxf5 Bxf5 9.Nxc3
-+ (-9.64) Depth: 9 00:00:00 126kN
1.Qe1 Qa2+ 2.Nbd2 Rfc8 3.Rh1 g6 4.e6 Bxe6 5.fxe7 Nxe7 6.Qh4 h5 7.gxh6 f6 8.h7+ Kf7 9.Re1 Rxc3 10.h8Q Rxh8 11.Qxh8 Rxd3 12.Qh6
-+ (-8.36) Depth: 9 00:00:02 1024kN
1.Qe1 g6 2.Qh4 Rfc8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Kh8 7.h7 Qe6 8.Ng5 Qe7 9.Bd2 Qb2 10.Bxf5 Bxf5 11.Kg3
-+ (-8.29) Depth: 10 00:00:04 2021kN
1.Qe1 g6 2.Qh4 Rfc8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Qe6 7.Bd2 Qb2 8.h7+ Kh8 9.Ng5 Qe7 10.Kg1 Qa2 11.Bxf5
-+ (-8.23) Depth: 11 00:00:05 2324kN
1.Qe1 g6 2.Qh4[] Rfc8 3.fxe7 Nxe7 4.Rh1[] h5 5.gxh6 Nf5 6.h7+ Kh8 7.Bxf5 Qa2+ 8.Kg3 gxf5 9.Bg5 Qg6 10.Nbd2 Rxc3 11.Kf4 Rb6 12.Bf6+ Rxf6 13.Qxf6+ Qxf6 14.exf6 Qc2 15.Rg1 Qd3 16.Rg8+
-+ (-7.86) Depth: 12 00:00:10 4152kN
1.Bxh7+ Kxh7 2.Rh1+ Kg8 3.Rh8+ Kxh8[] 4.Qh1+[] Kg8 5.fxg7 Kxg7 6.Qh6+[] Kg8[] 7.g6[] Qbb2+ 8.Bxb2 Qxb2+ 9.Nfd2 Bh3+ 10.Kxh3 fxg6 11.Qxg6+ Kh8 12.Qh6+[] Kg8 13.Qg6+ Kh8 14.Qh6+[] Kg8 15.Qg6+ Kh8 16.Qh6+[]
= (0.00) Depth: 12 00:00:14 6295kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.fxg7 Kxg7 6.Qh6+[] Kg8[] 7.g6[] Qbb2+ 8.Bxb2 Qxb2+ 9.Nbd2 Bh3+ 10.Kxh3 fxg6 11.Qxg6+ Kh8[] 12.Qh6+[] Kg8[] 13.Qg6+ Kh8[] 14.Qh6+[] Kg8[] 15.Qg6+ Kh8[] 16.Qh6+[]
= (0.00) Depth: 13 00:00:16 6982kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6 fxg6 6.Ng5 Qbb2+ 7.Bxb2 Rxb2+ 8.Kg3 Rg2+ 9.Kxg2 Bh3+ 10.Qxh3
= (0.12 !) Depth: 14 00:00:20 9109kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6 fxg6 6.Ng5 Qbb2+ 7.Bxb2
+/= (0.27 !) Depth: 14 00:00:21 9673kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[] Qab2+ 7.Bxb2 Qxb2+ 8.Kg3[] Qh2+ 9.Qxh2[]
+/= (0.67 !) Depth: 14 00:00:24 10562kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[]
+- (1.47 !) Depth: 14 00:00:27 12044kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5
+- (3.07 !) Depth: 14 00:00:32 14156kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[] Qbb2+ 7.Bxb2[] Qxb2+ 8.Kg3[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3
+- (4.88) Depth: 14 00:00:39 17866kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8[] 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2 Qxb2+ 7.Kg3 fxg6 8.Ng5 Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+ Kh8 12.Nf7+ Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3
+- (4.88) Depth: 15 00:00:50 23056kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8[] 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2 Qxb2+ 7.Kg3 fxg6 8.Ng5 Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+ Kh8 12.Nf7+ Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3
+- (5.00 !) Depth: 16 00:01:05 30051kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8[] 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2 Qxb2+ 7.Kg3 fxg6 8.Ng5 Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+ Kh8 12.Nf7+ Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3
+- (5.15 !) Depth: 16 00:01:20 36507kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8[] 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2[] Qxb2+ 7.Kg3[] fxg6 8.Ng5[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (5.55 !) Depth: 16 00:01:46 47973kN, tb=1
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2[] Qxb2+ 7.Kg3[] fxg6 8.Ng5[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (5.59) Depth: 16 00:02:08 58263kN, tb=1
1.Bxh7+ Kxh7 2.Rh1+[] Kg8[] 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2[] Qxb2+ 7.Kg3[] fxg6 8.Ng5[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (5.62) Depth: 17 00:02:56 80307kN, tb=3
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] Qbb2+ 6.Bxb2[] Qxb2+ 7.Kg3[] fxg6 8.Ng5[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (6.01) Depth: 18 00:04:56 139mN, tb=17

(, Microsoft 01.03.2011)

Rybka is by far the best engine in this position as it finds g6!! very fast. Houdini and Critter both want to play fxg7 for a very long time.


New game
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - 0 1

Analysis by Deep Rybka 4 SSE42 x64:

1.Qc2 g6 2.fxe7 Nxe7 3.Ba3 Qe6 4.Bc1 Bb5 5.Bxb5 Qg4+ 6.Kh1 Qh3+
-+ (-9.67) Depth: 6 00:00:00 17kN
1.Qc2 g6 2.fxe7 Nxe7 3.Bf4 Qab2 4.e6 Qxe6 5.Bxb8 Qh3+ 6.Kf2 Qxb8 7.Nbd2 Qbg3+ 8.Ke2
-+ (-9.67) Depth: 7 00:00:00 53kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qd8 4.Ba3 Kh8 5.Kg1 a4 6.Qf3 Be6 7.Bd6 Rb2
-+ (-9.33) Depth: 7 00:00:00 159kN
1.Nfd2 g6 2.fxe7 Nxe7 3.Rf6 Qb7 4.Ba3 Bf5 5.Qf3 Bxd3 6.Qxd3 Qa2 7.Kh1 Qd7 8.Bd6
-+ (-9.82) Depth: 8 00:00:00 186kN
1.fxe7 Nxe7 2.Rh1 g6 3.Ba3 Qe6 4.Bd6 Rb2+ 5.Nfd2 Rc8 6.Ba3 Ra2 7.Bd6
-+ (-9.70) Depth: 8 00:00:00 250kN
1.Qe1 g6 2.Qh4 Rfe8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Qc7 7.Bg5 Rb6 8.Bxf5 Bxf5 9.Qh4 Qb2+ 10.Nbd2 Kh7 11.Bf6 Qcxc3 12.Qg5
-+ (-8.31) Depth: 8 00:00:02 792kN
1.Qe1 g6 2.Qh4 Rfe8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Qc7 7.Bg5 Rb6 8.Bxf5 Bxf5 9.Qh4 Qb2+ 10.Nbd2 Kh7 11.Bf6 Qcxc3 12.Qg5
-+ (-8.18) Depth: 9 00:00:02 809kN
1.Qe1 g6 2.Qh4 Rfe8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Qc7 7.Bg5 Rb6 8.Bxf5 Bxf5 9.Qh4 Qb2+ 10.Nbd2 Kh7 11.Bf6 Qcxc3 12.Qg5
-+ (-8.18) Depth: 10 00:00:02 960kN
1.Qe1 g6 2.Qh4 Rfe8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.Qf2 Qc7 7.Bg5 Rb6 8.Bxf5 Bxf5 9.Qh4 Qb2+ 10.Nbd2 Kh7 11.Bf6 Qcxc3 12.Qg5
-+ (-8.18) Depth: 11 00:00:03 1225kN
1.Qe1 g6 2.Qh4 Rfc8 3.fxe7 Nxe7 4.Rh1 h5 5.gxh6 Nf5 6.h7+ Kh8 7.Bxf5 Bxf5 8.Bg5 Rc6 9.Bh6 Qd8 10.Bg5 f6 11.Bxf6+ Rxf6 12.Nbd2 Qxc3 13.exf6 a4 14.Qg5 a3 15.Ne5 Qdc7 16.f7
-+ (-8.21) Depth: 12 00:00:06 2198kN
1.Bxh7+ Kxh7 2.Rh1+ Kg8 3.Rh8+ Kxh8[] 4.Qh1+[] Kg8 5.fxg7 Kxg7 6.Qh6+ Kg8[] 7.g6[] Qa2+ 8.Kg1 Qf2+ 9.Kxf2[] Bh4+ 10.Kg2 Bh3+ 11.Kxh3 fxg6 12.Qxg6+ Kh8 13.Qh6+[] Kg8 14.Qg6+ Kh8 15.Qh6+[] Kg8 16.Qg6+
= (0.00) Depth: 12 00:00:10 3688kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.fxg7 Kxg7 6.Qh6+[] Kg8[] 7.g6[] Qa2+ 8.Kg1 Qf2+ 9.Kxf2[] Bh4+ 10.Kg2 Bh3+ 11.Kxh3 fxg6 12.Qxg6+ Kh8 13.Qh6+[] Kg8 14.Qg6+ Kh8 15.Qh6+[] Kg8 16.Qg6+
= (0.00) Depth: 13 00:00:11 4280kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.fxg7 Kxg7 6.Qh6+[] Kg8[] 7.g6[] Qa2+ 8.Kg1 Qf2+ 9.Kxf2[] Bh4+ 10.Kg2 Bh3+ 11.Kxh3 fxg6 12.Qxg6+ Kh8 13.Qh6+[] Kg8 14.Qg6+ Kh8 15.Qh6+[] Kg8 16.Qg6+
= (0.00) Depth: 14 00:00:13 5198kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6 fxg6 6.Ng5 Qbb2+ 7.Bxb2 Rxb2+ 8.Kg3 Bh3 9.Qxh3 Rg2+ 10.Kxg2 Qa2+ 11.Kg3
= (0.12 ++) Depth: 15 00:00:24 9955kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6 fxg6 6.Ng5
+/= (0.27 ++) Depth: 15 00:00:30 11555kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[]
+/= (0.67 ++) Depth: 15 00:00:38 13794kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[]
+- (1.47 ++) Depth: 15 00:00:49 18103kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[]
+- (3.07 ++) Depth: 15 00:01:05 24845kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[] Qbb2+ 7.Bxb2[] Qxb2+ 8.Kg3[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (5.10) Depth: 15 00:01:29 35525kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[] Qbb2+ 7.Bxb2[] Qxb2+ 8.Kg3[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rf8 16.Ke3[]
+- (5.52) Depth: 16 00:02:24 58981kN
1.Bxh7+ Kxh7 2.Rh1+[] Kg8 3.Rh8+[] Kxh8[] 4.Qh1+[] Kg8 5.g6[] fxg6 6.Ng5[] Qbb2+ 7.Bxb2[] Qxb2+ 8.Kg3[] Qf2+ 9.Kxf2[] Rxf6+ 10.exf6[] Bxf6 11.Qxd5+[] Kh8 12.Nf7+[] Kh7 13.Qxd7[] Nd8 14.Nxd8[] Rxd8 15.Qa7[] Rd5 16.Nd2
+- (5.91) Depth: 17 00:04:18 107mN

(, Microsoft 01.03.2011)
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: True Legend

Post by Terry McCracken »

Paloma wrote:From this position posted by Robert Flesher
[d]1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - 0 21
21. Bxh7+ Kxh7 22. Rh1+ Kg8 23. Rh8+ Kxh8 24. Qh1+ Kg8 25. g6!!
Winning! amazing test position!

we reach this position:
[d]1r3rk1/3bbpp1/1qn2PP1/p2pP3/3P4/2P2N2/6K1/qNB4Q b - - 0 25
you posted: Yes, that's the win and it's forced mate. 25..fg 26. Ng5! and after tossing pieces Black is mated.

after 25..fg 26. Ng5! we reach this position:
[d]1r3rk1/3bb1p1/1qn2Pp1/p2pP1N1/3P4/2P5/6K1/qNB4Q b - - 0 26
and now only 26...Qbb2! avoid mate! 27.Bxb2 Qxb2+ 28.Kg3 Qf2+! 29.Kxf2 Rxf6+ 30.exf6 Bxf6 31.Qd5+ +6.xx for white

second best move (26...Bh3+) leads after 27.Qxh3 to mate in 8 for white. :)
Okay guys I change it to mate in 35, or close!? :o
Terry McCracken
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Allard Siemelink
Posts: 297
Joined: Fri Jun 30, 2006 9:30 pm
Location: Netherlands

Re: True Legend

Post by Allard Siemelink »

Robert Flesher wrote: Rybka is by far the best engine in this position as it finds g6!! very fast. Houdini and Critter both want to play fxg7 for a very long time.
Spark, single threaded, needs ~5 seonds:

Code: Select all

 [10/26]    1.389     1463k     -655  Nfd2 g6 fxe7 Nxe7 Rf6 Nf5 Kh1 Qb7 Ba3 Rfc8 Bc5
 [10/26]    1.513     1630k     -655  ok/2.4
 [11/26]    1.529     1651k     -680  --Nf3d2
 [11/26]    1.919     2111k     -679  ++6/41 Rf1h1
 [11/26]    1.950     2159k     -630  Rh1 g6
 [11/26]    1.997     2227k     -605  Rh1 g6
 [11/26]    2.091     2342k     -555  Rh1 g6
 [11/28]    2.793     3231k     -562  Rh1 Qa2+ Nfd2 h6 fxg7 Kxg7 Rxh6 Rg8 Qh5 Be6 Rh7+ Kf8 Rh8 f5 exf6 Rxh8 Qxh8+ Kf7
 [11/28]    3.042     3537k     -561  ++7/41 Bd3xh7
 [11/28]    3.136     3655k     -455  Bxh7+ Kxh7
 [11/30]    3.479     4086k     -355  Bxh7+ Kxh7
 [11/30]    3.651     4286k     -255  Bxh7+ Kxh7
 [11/30]    3.916     4624k      -55  Bxh7+ Kxh7
 [11/36]    4.462     5316k      145  Bxh7+ Kxh7
 [11/36]    4.743     5660k      264  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Bh3 Qxh3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 gxf6
 [11/36]    4.758     5665k      264  ok/3.5
 [12/36]    4.899     5862k      289  Bxh7+ Kxh7
 [12/36]    5.023     6043k      314  Bxh7+ Kxh7
 [12/36]    5.242     6330k      364  Bxh7+ Kxh7
 [12/36]    5.616     6833k      459  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 Qh3+ Kg8 Qh8+ Kxf7 Qxb8
 [12/36]    5.647     6847k      459  ok/1.2
 [13/36]    5.725     6947k      434  --Bd3xh7
 [13/36]    5.741     6980k      409  --Bd3xh7
 [13/36]    5.757     7003k      359  --Bd3xh7
 [13/36]    5.835     7114k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Rb2+ Ke3 Nxd4 cxd4 Rxb1
 [13/36]    5.850     7124k      327  ok/1.0
 [14/36]    6.365     7897k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Rb2+ Ke3 Nxd4 cxd4 Rxb1
 [14/36]    6.505     8092k      327  ok/1.1
 [15/36]    7.083     8938k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1
 [15/36]    7.785     9840k      327  ok/1.2
 [16/44]    9.594    12359k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1
 [16/44]   17.145    22542k      327  ok/2.3
 [17/47]   22.589    30423k      343  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rb3+ Kf4 Rxb1 Ng5+ Kh6
 [17/50]   30.561    41367k      343  ok/1.8
 [18/50]   32.043    43485k      368  Bxh7+ Kxh7
 [18/50]   33.072    45060k      393  Bxh7+ Kxh7
 [18/50]   35.038    47861k      443  Bxh7+ Kxh7
 [18/50]   46.083    63377k      465  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1 Qc8 Bxd4+ Kxd4 Rd1+ Ke4 Re1+ Kd5
 [18/57]  0:01:10    96844k      465  ok/2.3
 [19/60]  0:01:41      135m      487  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rb4 Qe8 Bxd4+ Kd3 g5 Nxg5+ Kh6
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Robert Flesher
Posts: 1280
Joined: Tue Aug 18, 2009 3:06 am

Re: True Legend

Post by Robert Flesher »

Allard Siemelink wrote:
Robert Flesher wrote: Rybka is by far the best engine in this position as it finds g6!! very fast. Houdini and Critter both want to play fxg7 for a very long time.
Spark, single threaded, needs ~5 seonds:

Code: Select all

 [10/26]    1.389     1463k     -655  Nfd2 g6 fxe7 Nxe7 Rf6 Nf5 Kh1 Qb7 Ba3 Rfc8 Bc5
 [10/26]    1.513     1630k     -655  ok/2.4
 [11/26]    1.529     1651k     -680  --Nf3d2
 [11/26]    1.919     2111k     -679  ++6/41 Rf1h1
 [11/26]    1.950     2159k     -630  Rh1 g6
 [11/26]    1.997     2227k     -605  Rh1 g6
 [11/26]    2.091     2342k     -555  Rh1 g6
 [11/28]    2.793     3231k     -562  Rh1 Qa2+ Nfd2 h6 fxg7 Kxg7 Rxh6 Rg8 Qh5 Be6 Rh7+ Kf8 Rh8 f5 exf6 Rxh8 Qxh8+ Kf7
 [11/28]    3.042     3537k     -561  ++7/41 Bd3xh7
 [11/28]    3.136     3655k     -455  Bxh7+ Kxh7
 [11/30]    3.479     4086k     -355  Bxh7+ Kxh7
 [11/30]    3.651     4286k     -255  Bxh7+ Kxh7
 [11/30]    3.916     4624k      -55  Bxh7+ Kxh7
 [11/36]    4.462     5316k      145  Bxh7+ Kxh7
 [11/36]    4.743     5660k      264  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Bh3 Qxh3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 gxf6
 [11/36]    4.758     5665k      264  ok/3.5
 [12/36]    4.899     5862k      289  Bxh7+ Kxh7
 [12/36]    5.023     6043k      314  Bxh7+ Kxh7
 [12/36]    5.242     6330k      364  Bxh7+ Kxh7
 [12/36]    5.616     6833k      459  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 Qh3+ Kg8 Qh8+ Kxf7 Qxb8
 [12/36]    5.647     6847k      459  ok/1.2
 [13/36]    5.725     6947k      434  --Bd3xh7
 [13/36]    5.741     6980k      409  --Bd3xh7
 [13/36]    5.757     7003k      359  --Bd3xh7
 [13/36]    5.835     7114k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Rb2+ Ke3 Nxd4 cxd4 Rxb1
 [13/36]    5.850     7124k      327  ok/1.0
 [14/36]    6.365     7897k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Rb2+ Ke3 Nxd4 cxd4 Rxb1
 [14/36]    6.505     8092k      327  ok/1.1
 [15/36]    7.083     8938k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1
 [15/36]    7.785     9840k      327  ok/1.2
 [16/44]    9.594    12359k      327  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1
 [16/44]   17.145    22542k      327  ok/2.3
 [17/47]   22.589    30423k      343  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rb3+ Kf4 Rxb1 Ng5+ Kh6
 [17/50]   30.561    41367k      343  ok/1.8
 [18/50]   32.043    43485k      368  Bxh7+ Kxh7
 [18/50]   33.072    45060k      393  Bxh7+ Kxh7
 [18/50]   35.038    47861k      443  Bxh7+ Kxh7
 [18/50]   46.083    63377k      465  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rxb1 Qc8 Bxd4+ Kxd4 Rd1+ Ke4 Re1+ Kd5
 [18/57]  0:01:10    96844k      465  ok/2.3
 [19/60]  0:01:41      135m      487  Bxh7+ Kxh7 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 g6 fxg6 Ng5 Qbb2+ Bxb2 Qxb2+ Kg3 Qf2+ Kxf2 Rxf6+ exf6 Rb2+ Ke3 Bxf6 Qxd5+ Kh8 Nf7+ Kh7 Qxd7 Nxd4 cxd4 Rb4 Qe8 Bxd4+ Kd3 g5 Nxg5+ Kh6

I stand corrected and very impressed with Spark!
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