1 Hour CCR Test revisited

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Peter Berger
Posts: 653
Joined: Thu Mar 09, 2006 2:56 pm

1 Hour CCR Test revisited

Post by Peter Berger »

This one was created by Larry Kaufman and published in 1994 in Computer Chess Reports.

Publically availlable description: http://www.stmintz.com/ccc/index.php?id=167129

For weak/-ish engines some of the positions probably still provide a decent challenge by themselves, but escpecially the tactics are actually just trivial by today's standards.

Three positions remain interesting until this day and I think they are broken ( means: solution may be right, may be wrong, who knows ..)


Infamous CCR 22 is probably just wrong. In 2001 when we collected results of zillions of engines Fischer's move was way superior to engines' suggestions but when you use current Stockfish and let it search for a long time it first comes up with all the moves that allow Bb5, then rightly prefers a4 to them, but at greater depths it finally suggests the simple Qe2. As far as I can see this accomplishes the same thing in a better way.

CCR 2 used to be completely non-controversial. Bc8 might indeed be the best move, but the pawn-sac Sc6 is a very serious alternative that seems to offer pretty decent compensation. White probably has nothing more than sufficient compensation for the pawn when he takes.

This breaks CCR 1 , too. If b7 can be sacrified Qb3 is a move with valid alternatives, although it may be the best indeed.

The progress in engine strength is pretty amazing IMHO.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: 1 Hour CCR Test revisited

Post by Vinvin »

Peter Berger wrote:...
CCR 2 used to be completely non-controversial. Bc8 might indeed be the best move, but the pawn-sac Sc6 is a very serious alternative that seems to offer pretty decent compensation. White probably has nothing more than sufficient compensation for the pawn when he takes.
...
I made an overnight analyze (577 billions nodes) with Stockfish in December, Nc6 was the best move :
http://www.talkchess.com/forum/viewtopi ... 317#599317

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 46/76   17:07:29   577.283.145k   9.364k   +0,30   1. ... e6
 46/76   17:07:29   577.283.145k   9.364k   +0,27   1. ... Fc8 2.Cf3 Cc6 3.Fd2 e6 4.Fd3 Fd7 5.0-0 Fe7 6.Tfc1 0-0 7.a3 a6 8.Dd1 Tc8 9.Ce5 g6 10.Cxd7 Cxd7 11.Fe1 Cb6 12.Ce2 Fd6 13.Db3 Te8 14.g3 Dc7 15.Fb4 Fxb4 16.axb4 Ta8 17.b5 axb5 18.Fxb5 Txa1 19.Txa1 Cd7 20.Cf4 Tc8 21.Cd3 Rg7 22.Rg2 Db6 23.Tc1 Cf6 24.Cc5 Ce7 25.Ta1
 46/76   17:07:29   577.283.145k   9.364k   +0,12   1. ... Cc6 2.Dxb7 Fd7 3.Db3 Tb8 4.Dd1 e5 5.Cf3 Fd6 6.dxe5 Cxe5 7.Cd4 0-0 8.Fe2 Ce4 9.0-0 Cxc3 10.bxc3 Dh4 11.f4 Cg4 12.Fxg4 Fxg4 13.Dd3 Fd7 14.Fd2 Tb6 15.Tfb1 De7 16.Tb3 Fc5 17.Te1 Te8 18.Teb1 Tc8 19.Fe1 De4 20.Dxe4 dxe4 21.f5 f6 22.g4 Rf7 23.h3 g6 24.fxg6+ hxg6 25.Rg2 f5 26.Txb6 Fxb6 27.gxf5 gxf5 28.Fd2 Rf6
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zullil
Posts: 6442
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Full name: Louis Zulli

Re: 1 Hour CCR Test revisited

Post by zullil »

Peter Berger wrote:This one was created by Larry Kaufman and published in 1994 in Computer Chess Reports.

Publically availlable description: http://www.stmintz.com/ccc/index.php?id=167129

Infamous CCR 22 is probably just wrong. In 2001 when we collected results of zillions of engines Fischer's move was way superior to engines' suggestions but when you use current Stockfish and let it search for a long time it first comes up with all the moves that allow Bb5, then rightly prefers a4 to them, but at greater depths it finally suggests the simple Qe2. As far as I can see this accomplishes the same thing in a better way.
[D]r3kb1r/pp1b1ppp/1q2pn2/n2p4/3P1B2/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 2 11

Latest SF build with MultiPV=3 hints that Qe2 is slightly better than Fischer's move. At least it doesn't weaken the b3 square. Probably both moves lead to draws with perfect play ...

Code: Select all

info depth 42 seldepth 59 multipv 1 score cp 34 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv c2e2 a8c8 f3e5 f8e7 e1g1 e8g8 a2a4 a5b3 a1a2 d7e8 e5f3 f6h5 f4g5 e7g5 f3g5 h5f6 b1d2 b3d2 e2d2 e8c6 d2e2 b6c7 g5f3 f6d7 a4a5 h7h6 f1e1 a7a6 g2g3 d7f6 f3e5 f6d7 a2a1 d7e5 e2e5 c7e5 e1e5 f8d8 g1g2 g7g6 e5e1 g8g7 h2h4

info depth 42 seldepth 59 multipv 2 score cp 28 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv a2a4 f6h5 f4e3 f8d6 e1g1 b6c7 b1d2 a8c8 f3e5 d6e5 d4e5 c7e5 e3a7 h5f4 a7b6 f4d3 c2d3 a5c4 d2c4 d5c4 d3d1 d7c6 d1g4 e8g8 f1e1 e5f5 g4f5 e6f5 f2f3 f8e8 a4a5 f7f6 g1f2 g8f7 e1e8 c8e8 a5a6 b7a6 a1a6 e8a8 a6a8 c6a8 f2e3 a8c6 e3d4 c6b5 h2h3

info depth 42 seldepth 59 multipv 3 score cp 23 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv e1g1 f6h5 f4e3 d7b5 b1d2 b5d3 c2d3 h5f6 e3g5 a8c8 a1b1 a5c6 g5f6 g7f6 f3e1 f8g7 d3h3 b6a5 h3g4 e8g8 e1d3 c6e7 b1a1 e7f5 f1e1 g8h8 g4e2 f5d6 d2f1 f6f5 f1g3 d6c4 g3h5 f8g8 a2a4 a5c7 g2g3 c4d6 h5g7 g8g7 a4a5 c7c4 g1g2
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zullil
Posts: 6442
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Location: PA USA
Full name: Louis Zulli

Re: 1 Hour CCR Test revisited

Post by zullil »

zullil wrote:
Peter Berger wrote:This one was created by Larry Kaufman and published in 1994 in Computer Chess Reports.

Publically availlable description: http://www.stmintz.com/ccc/index.php?id=167129

Infamous CCR 22 is probably just wrong. In 2001 when we collected results of zillions of engines Fischer's move was way superior to engines' suggestions but when you use current Stockfish and let it search for a long time it first comes up with all the moves that allow Bb5, then rightly prefers a4 to them, but at greater depths it finally suggests the simple Qe2. As far as I can see this accomplishes the same thing in a better way.
[D]r3kb1r/pp1b1ppp/1q2pn2/n2p4/3P1B2/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 2 11

Latest SF build with MultiPV=3 hints that Qe2 is slightly better than Fischer's move. At least it doesn't weaken the b3 square. Probably both moves lead to draws with perfect play ...

Code: Select all

info depth 42 seldepth 59 multipv 1 score cp 34 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv c2e2 a8c8 f3e5 f8e7 e1g1 e8g8 a2a4 a5b3 a1a2 d7e8 e5f3 f6h5 f4g5 e7g5 f3g5 h5f6 b1d2 b3d2 e2d2 e8c6 d2e2 b6c7 g5f3 f6d7 a4a5 h7h6 f1e1 a7a6 g2g3 d7f6 f3e5 f6d7 a2a1 d7e5 e2e5 c7e5 e1e5 f8d8 g1g2 g7g6 e5e1 g8g7 h2h4

info depth 42 seldepth 59 multipv 2 score cp 28 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv a2a4 f6h5 f4e3 f8d6 e1g1 b6c7 b1d2 a8c8 f3e5 d6e5 d4e5 c7e5 e3a7 h5f4 a7b6 f4d3 c2d3 a5c4 d2c4 d5c4 d3d1 d7c6 d1g4 e8g8 f1e1 e5f5 g4f5 e6f5 f2f3 f8e8 a4a5 f7f6 g1f2 g8f7 e1e8 c8e8 a5a6 b7a6 a1a6 e8a8 a6a8 c6a8 f2e3 a8c6 e3d4 c6b5 h2h3

info depth 42 seldepth 59 multipv 3 score cp 23 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv e1g1 f6h5 f4e3 d7b5 b1d2 b5d3 c2d3 h5f6 e3g5 a8c8 a1b1 a5c6 g5f6 g7f6 f3e1 f8g7 d3h3 b6a5 h3g4 e8g8 e1d3 c6e7 b1a1 e7f5 f1e1 g8h8 g4e2 f5d6 d2f1 f6f5 f1g3 d6c4 g3h5 f8g8 a2a4 a5c7 g2g3 c4d6 h5g7 g8g7 a4a5 c7c4 g1g2
Another iteration:

Code: Select all

info depth 43 seldepth 67 multipv 1 score cp 40 nodes 395309301385 nps 20184911 hashfull 999 tbhits 0 time 19584396 pv c2e2 a8c8 f3e5 f8e7 e1g1 e8g8 a2a4 a5b3 a1a2 d7e8 e5f3 f6h5 f4g5 e7g5 f3g5 h5f6 b1d2 b3d2 e2d2 e8c6 d2c2 h7h6 g5f3 f6e8 f3e5 e8d6 f1e1 f8e8 a2a1 f7f6 e5g6 b6c7 e1e3 d6c4 e3e2 c6d7 e2e1 b7b6 e1e2 c4d6 a1e1 d6f7 c2b3 c8b8 d3a6 f7d6 a6d3

info depth 43 seldepth 67 multipv 2 score cp 22 nodes 395309301385 nps 20184911 hashfull 999 tbhits 0 time 19584396 pv a2a4 f6h5 f4e3 f8d6 b1d2 h5f4 e3f4 d6f4 g2g3 f4d6 b2b4 a5c6 b4b5 c6a5 e1g1 g7g6 c3c4 d5c4 d2c4 a5c4 d3c4 e8g8 c2e2 f8c8 f1c1 a7a6 b5a6 b7a6 d4d5 e6d5 c4d5 c8c1 a1c1 a8f8 e2a2 g8g7 c1b1 b6a5 f3g5 f7f6 b1b7 a5e1 g1g2 f6g5 b7d7 d6e7 d5c4 g7h6 a2e2 e1e2 c4e2 e7c5 e2a6 f8f2 g2h3 f2b2

info depth 43 seldepth 67 multipv 3 score cp 16 nodes 395309301385 nps 20184911 hashfull 999 tbhits 0 time 19584396 pv b2b4 a5c4 a2a4 f6h5 f4c1 b6c7 e1g1 f8d6 f1e1 h5f6 b1d2 e8g8 d3c4 d5c4 f3e5 f8c8 d2c4 d6e5 d4e5 c7c4 e5f6 c4c3 c2c3 c8c3 f6g7 a7a6 c1h6 a8c8 h2h3 d7c6 e1c1 c3c1 a1c1 c8d8 f2f3 c6a4 c1c7 a4c6 g1f2 f7f5 c7e7 d8d4 e7e6 d4b4 e6e7 b4b2 f2g3
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Terry McCracken
Posts: 16465
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Location: Canada

Re: 1 Hour CCR Test revisited

Post by Terry McCracken »

zullil wrote:
Peter Berger wrote:This one was created by Larry Kaufman and published in 1994 in Computer Chess Reports.

Publically availlable description: http://www.stmintz.com/ccc/index.php?id=167129

Infamous CCR 22 is probably just wrong. In 2001 when we collected results of zillions of engines Fischer's move was way superior to engines' suggestions but when you use current Stockfish and let it search for a long time it first comes up with all the moves that allow Bb5, then rightly prefers a4 to them, but at greater depths it finally suggests the simple Qe2. As far as I can see this accomplishes the same thing in a better way.
[D]r3kb1r/pp1b1ppp/1q2pn2/n2p4/3P1B2/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 2 11

Latest SF build with MultiPV=3 hints that Qe2 is slightly better than Fischer's move. At least it doesn't weaken the b3 square. Probably both moves lead to draws with perfect play ...

Code: Select all

info depth 42 seldepth 59 multipv 1 score cp 34 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv c2e2 a8c8 f3e5 f8e7 e1g1 e8g8 a2a4 a5b3 a1a2 d7e8 e5f3 f6h5 f4g5 e7g5 f3g5 h5f6 b1d2 b3d2 e2d2 e8c6 d2e2 b6c7 g5f3 f6d7 a4a5 h7h6 f1e1 a7a6 g2g3 d7f6 f3e5 f6d7 a2a1 d7e5 e2e5 c7e5 e1e5 f8d8 g1g2 g7g6 e5e1 g8g7 h2h4

info depth 42 seldepth 59 multipv 2 score cp 28 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv a2a4 f6h5 f4e3 f8d6 e1g1 b6c7 b1d2 a8c8 f3e5 d6e5 d4e5 c7e5 e3a7 h5f4 a7b6 f4d3 c2d3 a5c4 d2c4 d5c4 d3d1 d7c6 d1g4 e8g8 f1e1 e5f5 g4f5 e6f5 f2f3 f8e8 a4a5 f7f6 g1f2 g8f7 e1e8 c8e8 a5a6 b7a6 a1a6 e8a8 a6a8 c6a8 f2e3 a8c6 e3d4 c6b5 h2h3

info depth 42 seldepth 59 multipv 3 score cp 23 nodes 188360753092 nps 19653938 hashfull 999 tbhits 0 time 9583868 pv e1g1 f6h5 f4e3 d7b5 b1d2 b5d3 c2d3 h5f6 e3g5 a8c8 a1b1 a5c6 g5f6 g7f6 f3e1 f8g7 d3h3 b6a5 h3g4 e8g8 e1d3 c6e7 b1a1 e7f5 f1e1 g8h8 g4e2 f5d6 d2f1 f6f5 f1g3 d6c4 g3h5 f8g8 a2a4 a5c7 g2g3 c4d6 h5g7 g8g7 a4a5 c7c4 g1g2
Qe2 is wasting a move, a4! is to the point. A sentient machine would play a4! unless it knew it was a poor choice.
Terry McCracken
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jorose
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Full name: Jonathan Rosenthal

Re: 1 Hour CCR Test revisited

Post by jorose »

Hard to say, both prevent Bb5. e2 tends to be a better square for the queen than c2. a4 is not necessarily a better square than a2 for the a-pawn as it weakens the b3 square and gives the bishop a target. a4 could even be viewed as a concession to the positional threat Bb5.
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Terry McCracken
Posts: 16465
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Location: Canada

Re: 1 Hour CCR Test revisited

Post by Terry McCracken »

jorose wrote:Hard to say, both prevent Bb5. e2 tends to be a better square for the queen than c2. a4 is not necessarily a better square than a2 for the a-pawn as it weakens the b3 square and gives the bishop a target. a4 could even be viewed as a concession to the positional threat Bb5.
I know that, but it seems the way to proceed strategically if you want to win. Moves that gain some advantage in near level positions are often not without risk or compromise. Pawn moves are the most susceptible to permanent compromise.

Qe2 is indeed safer and good for drawing chess imho with a small advantage.
Terry McCracken
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Ferdy
Posts: 4833
Joined: Sun Aug 10, 2008 3:15 pm
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Re: 1 Hour CCR Test revisited

Post by Ferdy »

Peter Berger wrote:This one was created by Larry Kaufman and published in 1994 in Computer Chess Reports.

Publically availlable description: http://www.stmintz.com/ccc/index.php?id=167129

For weak/-ish engines some of the positions probably still provide a decent challenge by themselves, but escpecially the tactics are actually just trivial by today's standards.

Three positions remain interesting until this day and I think they are broken ( means: solution may be right, may be wrong, who knows ..)


Infamous CCR 22 is probably just wrong. In 2001 when we collected results of zillions of engines Fischer's move was way superior to engines' suggestions but when you use current Stockfish and let it search for a long time it first comes up with all the moves that allow Bb5, then rightly prefers a4 to them, but at greater depths it finally suggests the simple Qe2. As far as I can see this accomplishes the same thing in a better way.

CCR 2 used to be completely non-controversial. Bc8 might indeed be the best move, but the pawn-sac Sc6 is a very serious alternative that seems to offer pretty decent compensation. White probably has nothing more than sufficient compensation for the pawn when he takes.

This breaks CCR 1 , too. If b7 can be sacrified Qb3 is a move with valid alternatives, although it may be the best indeed.

The progress in engine strength is pretty amazing IMHO.
Tried the sets with some uci engines, but I use 2s, 4s, 8s and 16s limits,
1 core, 64mb hash at i7-2600k. No engine has make it perfect but Rodent is close.
uscf = points*8 + 2000
arasan = 84*8 + 2000 = 2672

Results sorted in descending order.

Code: Select all

                  Engine   Points    USCF   numPosNotSolved
             Arasan 17.4    84/100    2672        3
               spark-1.0    83/100    2664        3
       Texel 1.05 64-bit    83/100    2664        3
          HIARCS 14 WCSC    81/100    2648        4
    Rodent 1.6 (build 6)    81/100    2648        1
             cheng4 0.38    80/100    2640        2
          Andscacs 0.72p    79/100    2632        4
              Senpai 1.0    79/100    2632        5
        Hannibal 1.5 x64    78/100    2624        4
           Houdini 4 x64    76/100    2608        4
        DiscoCheck 5.2.1    75/100    2600        2
            Gaviota v1.0    75/100    2600        3
   Deuterium v15.1.35.36    74/100    2592        3
       Hakkapeliitta 2.0    74/100    2592        5
      Rhetoric 1.4.1 x64    74/100    2592        6
              GreKo 12.1    72/100    2576        4
       GNU Chess 5.60-64    71/100    2568        5
   Stockfish 6 64 POPCNT    68/100    2544        3
iCE 2.0 v2240 x64/popcnt    64/100    2512        4
       Maverick 0.51 x64    63/100    2504        8
  BikJump v2.01 (64-bit)    49/100    2392       11
Sample summary from Arasan.

Code: Select all

                  engine   pos    2s    4s    8s   16s  points
             Arasan 17.4     1     1     1     1     1     4
             Arasan 17.4     2     0     0     1     1     2
             Arasan 17.4     3     1     1     1     1     4
             Arasan 17.4     4     1     1     1     1     4
             Arasan 17.4     5     1     1     1     1     4
             Arasan 17.4     6     1     1     1     1     4
             Arasan 17.4     7     0     0     1     1     2
             Arasan 17.4     8     0     0     0     0     0
             Arasan 17.4     9     1     1     1     1     4
             Arasan 17.4    10     1     1     1     1     4
             Arasan 17.4    11     1     1     1     1     4
             Arasan 17.4    12     1     1     1     1     4
             Arasan 17.4    13     1     1     1     1     4
             Arasan 17.4    14     1     1     1     1     4
             Arasan 17.4    15     1     1     1     1     4
             Arasan 17.4    16     1     1     1     1     4
             Arasan 17.4    17     1     1     1     1     4
             Arasan 17.4    18     1     1     1     1     4
             Arasan 17.4    19     1     1     1     1     4
             Arasan 17.4    20     0     0     0     0     0
             Arasan 17.4    21     1     1     1     1     4
             Arasan 17.4    22     0     0     0     0     0
             Arasan 17.4    23     1     1     1     1     4
             Arasan 17.4    24     1     1     1     1     4
             Arasan 17.4    25     1     1     1     1     4
USCF 2672
Sample from Rodent.

Code: Select all

                  engine   pos    2s    4s    8s   16s  points
    Rodent 1.6 (build 6)     1     1     1     1     1     4
    Rodent 1.6 (build 6)     2     1     0     0     0     1
    Rodent 1.6 (build 6)     3     1     1     1     1     4
    Rodent 1.6 (build 6)     4     0     0     0     1     1
    Rodent 1.6 (build 6)     5     1     1     1     1     4
    Rodent 1.6 (build 6)     6     1     1     1     1     4
    Rodent 1.6 (build 6)     7     0     1     1     1     3
    Rodent 1.6 (build 6)     8     0     1     1     1     3
    Rodent 1.6 (build 6)     9     1     1     1     1     4
    Rodent 1.6 (build 6)    10     1     1     1     1     4
    Rodent 1.6 (build 6)    11     1     1     1     1     4
    Rodent 1.6 (build 6)    12     1     1     1     1     4
    Rodent 1.6 (build 6)    13     1     1     1     1     4
    Rodent 1.6 (build 6)    14     1     1     1     1     4
    Rodent 1.6 (build 6)    15     1     1     1     1     4
    Rodent 1.6 (build 6)    16     1     1     1     1     4
    Rodent 1.6 (build 6)    17     1     1     1     1     4
    Rodent 1.6 (build 6)    18     0     1     1     1     3
    Rodent 1.6 (build 6)    19     1     1     1     1     4
    Rodent 1.6 (build 6)    20     0     0     0     1     1
    Rodent 1.6 (build 6)    21     0     0     0     1     1
    Rodent 1.6 (build 6)    22     0     0     0     0     0
    Rodent 1.6 (build 6)    23     1     1     1     1     4
    Rodent 1.6 (build 6)    24     1     1     1     1     4
    Rodent 1.6 (build 6)    25     1     1     1     1     4
USCF 2648
I revised the test set a bit. Added LAN for bm and am.

Code: Select all

rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/2N1P3/PP3PPP/R1BQKBNR w KQkq - 0 1 id "CCR01"; bm Qb3; c0 "d1b3";
rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/1QN1P3/PP3PPP/R1B1KBNR b KQkq - 1 1 id "CCR02"; bm Bc8; c0 "f5c8";
r1bqk2r/ppp2ppp/2n5/4P3/2Bp2n1/5N1P/PP1N1PP1/R2Q1RK1 b kq - 1 10 id "CCR03"; bm Nh6; c0 "g4h6";
r1bqrnk1/pp2bp1p/2p2np1/3p2B1/3P4/2NBPN2/PPQ2PPP/1R3RK1 w - - 1 12 id "CCR04"; bm b4; c0 "b2b4";
rnbqkb1r/ppp1pppp/5n2/8/3PP3/2N5/PP3PPP/R1BQKBNR b KQkq - 3 5 id "CCR05"; bm e5; c0 "e7e5";
rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQ - 1 5 id "CCR06"; bm Bxc3+; c0 "b4c3";
r4rk1/3nppbp/bq1p1np1/2pP4/8/2N2NPP/PP2PPB1/R1BQR1K1 b - - 1 12 id "CCR07"; bm Rfb8; c0 "f8b8";
rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq c6 1 6 id "CCR08"; bm d5; c0 "d4d5";
r1bq1rk1/1pp2pbp/p1np1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R1NQKB1R b KQ - 1 9 id "CCR09"; bm Nd4; c0 "c6d4";
rnbqr1k1/1p3pbp/p2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - - 1 11 id "CCR10"; bm a4; c0 "a2a4";
rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq f3 1 3 id "CCR11"; bm d5; c0 "d7d5";
r1bqk1nr/pppnbppp/3p4/8/2BNP3/8/PPP2PPP/RNBQK2R w KQkq - 2 6 id "CCR12"; bm Bxf7+; c0 "c4f7";
rnbq1b1r/ppp2kpp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKB1R b KQ d3 1 5 id "CCR13"; am Ne4; c0 "f6e4";
rnbqkb1r/pppp1ppp/3n4/8/2BQ4/5N2/PPP2PPP/RNB2RK1 b kq - 1 6 id "CCR14"; am Nxc4; c0 "d6c4";
r2q1rk1/2p1bppp/p2p1n2/1p2P3/4P1b1/1nP1BN2/PP3PPP/RN1QR1K1 w - - 1 12 id "CCR15"; bm exf6; c0 "e5f6";
r1bqkb1r/2pp1ppp/p1n5/1p2p3/3Pn3/1B3N2/PPP2PPP/RNBQ1RK1 b kq - 2 7 id "CCR16"; bm d5; c0 "d7d5";
r2qkbnr/2p2pp1/p1pp4/4p2p/4P1b1/5N1P/PPPP1PP1/RNBQ1RK1 w kq - 1 8 id "CCR17"; am hxg4; c0 "h3g4";
r1bqkb1r/pp3ppp/2np1n2/4p1B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq e6 1 7 id "CCR18"; bm Bxf6+; c0 "g5f6";
rn1qk2r/1b2bppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQR1K1 w kq - 5 10 id "CCR19"; bm Bxe6; c0 "b3e6";
r1b1kb1r/1pqpnppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R w KQkq - 3 8 id "CCR20"; am Ndb5; c0 "d4b5";
r1bqnr2/pp1ppkbp/4N1p1/n3P3/8/2N1B3/PPP2PPP/R2QK2R b KQ - 2 11 id "CCR21"; am Kxe6; c0 "f7e6";
r3kb1r/pp1n1ppp/1q2p3/n2p4/3P1Bb1/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 3 11 id "CCR22"; bm a4; c0 "a2a4";
r1bq1rk1/pppnnppp/4p3/3pP3/1b1P4/2NB3N/PPP2PPP/R1BQK2R w KQ - 3 7 id "CCR23"; bm Bxh7+; c0 "d3h7";
r2qkbnr/ppp1pp1p/3p2p1/3Pn3/4P1b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq - 2 6 id "CCR24"; bm Nxe5; c0 "f3e5";
rn2kb1r/pp2pppp/1qP2n2/8/6b1/1Q6/PP1PPPBP/RNB1K1NR b KQkq - 1 6 id "CCR25"; am Qxb3; c0 "b6b3";
Top
Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: 1 Hour CCR Test revisited

Post by Dann Corbit »

The test has a bug in it.
How is any engine coming up with a4 for this position?:
[d]r3kb1r/pp1n1ppp/1q2p3/n2p4/3P1Bb1/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 3 11 id "CCR22"; bm a4; c0 "a2a4";

First of all, the position is wrong.
The Fischer Petrosian game with response a4! was this game:
  • [Event "Match URS-World"]
    [Site "?"]
    [Date "1970.03.??"]
    [Round "23"]
    [White "Fischer, Robert J"]
    [Black "Petrosian, Tigran A"]
    [Result "1-0"]
    [ECO "B13k"]
    [Variation "Caro-Kann: Exchange, Rubinstein, 6...Bg4"]

    1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Qb3 Na5 8.Qa4+ Bd7 9.Qc2 e6 10.Nf3 Qb6 11. {here is the clever response} a4 Rc8 12.Nbd2 Nc6 13.Qb1 Nh5 14.Be3 h6 15.Ne5 Nf6 16.h3 Bd6 17.O-O Kf8 18.f4 Be8 19.Bf2 Qc7 20.Bh4 Ng8 21.f5 Nxe5 22.dxe5 Bxe5 23.fxe6 Bf6 24.exf7 Bxf7 25.Nf3 Bxh4 26.Nxh4 Nf6 27.Ng6+ Bxg6 28.Bxg6 Ke7 29.Qf5 Kd8 30.Rae1 Qc5+ 31.Kh1 Rf8 32.Qe5 Rc7 33.b4 Qc6 34.c4 dxc4 35.Bf5 Rff7 36.Rd1+ Rfd7 37.Bxd7 Rxd7 38.Qb8+ Ke7 39.Rde1+ 1-0
Even at that, there is a better move than a4 for the correct position, namely Qe2!!:
  • Searching: r3kb1r/pp1b1ppp/1q2pn2/n2p4/3P1B2/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 0 1
    infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0

    1 +0.93 00:00 49 O-O
    2 +2.30 00:00 159 b4 Bxb4 cxb4
    3 +2.30 00:00 230 b4 Bxb4 cxb4
    4 +2.20 00:00 341 b4 h6 bxa5 Qxa5
    5 +0.80 00:00 1230 Ne5 Nc4 Nxc4 dxc4 Bxc4
    6 +0.55 00:00 3425 Ne5 Bb5 O-O Bxd3 Nxd3 Nc4
    7 +0.52 00:00 5723 Ne5 Bb5 h3 a6 Bxb5+ axb5 O-O Nc4
    8 +0.32 00:00 11591 Ne5 h6 O-O Bd6 Nxd7 Nxd7 Bxd6 Qxd6
    9 +0.67 00:00 36565 Nbd2 Bd6 Ne5 Qc7 Nxd7 Bxf4 Nxf6+ gxf6 Qa4+ Nc6 g3
    10 +0.74 00:00 73549 O-O Bd6 Ne5 Qc7 Nxd7 Qxd7 Be5 Nc4 Bxc4 dxc4 Nd2
    11 +0.72 00:00 104297 Ne5 Bd6 b4 Bxb4 cxb4 Qxd4 Nxd7 Nxd7 bxa5 Qxa1 O-O
    12 +0.77 00:00 146033 Ne5 Bd6 b4 Nc6 Nxd7 Kxd7 Bxd6 Kxd6 b5 Nxd4 cxd4 Qxd4
    13 +0.78 00:00 228170 Ne5 Bd6 b4 Nc6 Nxd7 Kxd7 Bxd6 Kxd6 b5 Na5 Nd2 Kc7 O-O Rac8 Qa4 h6
    14 +0.54 00:00 1820K Nbd2 Bd6 Ne5 Rc8 O-O h6 Rfb1 Qc7 Re1 O-O h3 Nc6 Ndf3 Kh8 a4 Nxe5
    15 +0.48 00:00 2126K Nbd2 Bd6 Bxd6 Qxd6 O-O O-O Rae1 Rac8 Ne5 h6 Ndf3 Nc6 h3 Qc7 a4 Nxe5
    16 +0.48 00:00 2318K Nbd2 Bd6 Bxd6 Qxd6 O-O O-O Rae1 Rac8 Ne5 Nc6 Ndf3 Nb4 Qb3 Nxd3 Nxd3 Qc7 Nfe5 h6
    17 +0.51 00:00 3422K Nbd2 Bd6 Bxd6 Qxd6 O-O O-O Ne5 Rac8 Rfe1 Nc6 Qb3 Qc7 Ndf3 h6 a3 Nxe5 Nxe5
    18 +0.43 00:01 4443K Nbd2 Bd6 Bxd6 Qxd6 O-O O-O Ne5 Rac8 Ndf3 Nc6 Qe2 h6 Rae1 Ne7 Rd1 a6 Rfe1 Kh8 Nxd7 Qxd7 Ne5
    19 +0.47 00:01 5091K Nbd2 Bd6 Bxd6 Qxd6 O-O O-O Ne5 Rac8 Rfe1 Nc6 Qd1 a6 h3 h6 Ndf3 Qc7 a3 Ne7 Qb3 Nc6
    20 +0.47 00:02 9209K Nbd2 Rc8 O-O Bd6 Bxd6 Qxd6 Rfe1 Nc6 Qd1 O-O Ne5 a6 h3 h6 Ndf3 Qc7 Qe2 Qd8 Rac1 Nxe5 Nxe5
    21 +0.40 00:04 16486K Nbd2 Rc8 a4 Bd6 Ne5 Nc6 Nxd7 Kxd7 Bxd6 Kxd6 Qc1 Kc7 O-O Kb8 Nf3 h6 h3 g5 Re1 Rhg8 Ne5 Qc7 Nxc6+ Qxc6 a5
    22 +0.36 00:07 33030K Nbd2 Rc8 a4 Bd6 Bxd6 Qxd6 O-O Nc6 Qd1 O-O Re1 Nh5 g3 Nf6 Ne5 Qc7 Ndf3 h6 Kg2 a6 Qc2 Ne7 Nxd7 Qxd7 Ne5 Qc7
    23 +0.28 00:09 55348K Nbd2 Rc8 O-O Bb5 b4 Bxd3 Qxd3 Nc4 Nxc4 dxc4 Qc2 Nd5 Bg3 Be7 Ne5 Qa6 a4 O-O Rae1 g6 Nf3 Qc6 Be5 Rfd8 b5 Qe8 h3
    24 +0.28 00:10 64564K Nbd2 Rc8 O-O Bb5 b4 Bxd3 Qxd3 Nc4 Nxc4 dxc4 Qc2 Nd5 Bg3 Be7 Ne5 Qa6 a4 O-O Rfe1 Rfd8 Re2 g6 h3 Qb6 a5 Qb5 Rae1 Qe8 f4 f6
    25 +0.38 00:16 117479K a4 Rc8 O-O Nc4 Ra2 Bd6 Bxd6 Nxd6 Nbd2 O-O Ne5 h6 Rc1 Qc7 b3 b6 Raa1 Bc6 c4 Qb7 c5 Nde4 f3 Nxd2 Qxd2
    26 +0.28 00:34 301306K a4 Rc8 O-O Nh5 Be3 Bd6 Ne5 Nf6 Nd2 Nc6 Qb1 Qc7 f4 O-O Ndf3 h6 Bf2 Nh5 Nxd7 Qxd7 g3 Nf6 h3 Qc7 Re1 a6 Ne5 Bxe5 dxe5 Nd7
    27 +0.29 00:36 321119K a4 Rc8 O-O Nc4 Ra2 Bd6 Bxd6 Nxd6 Ne5 h6 Ra1 O-O Nd2 Qc7 Rfe1 Bc6 h3 Rfe8 b3 b6 c4 dxc4 bxc4 Nd7 Nxc6 Qxc6 a5
    28 +0.30 00:38 342004K a4 Rc8 O-O Nc4 Ra2 Bd6 Bxd6 Nxd6 Ne5 Qc7 Ra1 O-O Nd2 Bc6 b3 b6 c4 Bb7 a5 bxa5 Qc3 Nb5 Qxa5 Nxd4 Qxc7 Rxc7 Rxa7 dxc4 bxc4
    29 +0.26 00:50 462088K a4 Rc8 O-O Nc4 Ra2 Bd6 Bxd6 Nxd6 Ne5 h6 b3 O-O a5 Qd8 Rc1 Nf5 Qb2 Ne7 Nd2 Nc6 Ndf3 Ne4 Nxc6 Bxc6 Bxe4 dxe4 Ne5 Qg5 c4
    30 +0.30 01:24 800815K Qe2 Rc8 Ne5 Nc6 a4 Nxe5 Bxe5 Be7 O-O O-O a5 Qd8 Re1 a6 Nd2 Bc6 Nf3 Ne4 Bf4 Nd6 h3 h6 Nd2 Bd7 Qg4 Nf5 Nf3 Bb5 Bxb5 axb5
    31 +0.42 01:55 1114M Qe2 Rc8 Ne5 Nc6 a4 Nxe5 Bxe5 Be7 O-O O-O a5 Qd8 Re1 a6 Nd2 Bc6 Bc2 h6 h3 Bb5 Qe3 Bd6 Nf3 Bc7 Bxc7 Qxc7 Ne5 Nd7 Nxd7 Bxd7 Qd3 g6
    32 +0.40 02:06 1219M Qe2 Rc8 Ne5 Nc6 a4 Nxe5 Bxe5 Be7 O-O O-O a5 Qd8 h3 a6 Nd2 Bc6 Rfe1 Nd7 Bf4 Qe8 Nf3 Nf6 Qe3 Bb5 Bc2 Qd8 Bg5 Nd7 Bxe7 Qxe7 Qf4 Qf6 Qxf6 Nxf6 Ne5 h6
    33 +0.40 02:18 1327M Qe2 Rc8 Ne5 Nc6 a4 Nxe5 Bxe5 Be7 O-O O-O a5 Qd8 Nd2 a6 Rfe1 Bc6 Nb3 h6 Nc5 Bd6 h3 Qe7 Bxd6 Qxd6 Qe5 Qxe5 dxe5 Nd7 Nb3 Rfd8 Nd4 Nc5 Bc2 Bb5 f4
    34 +0.36 02:48 1624M Qe2 Rc8 Ne5 Nc6 a4 Nxe5 Bxe5 Be7 O-O O-O a5 Qd8 Nd2 a6 Rfe1 Bc6 Nb3 Nd7 Bf4 Qe8 h3 Kh8 Bg3 Kg8 Bh2 Qd8 Bf4 Qe8 Bg3 Qd8 Nd2 Nf6 Nf3 Qe8 Ne5 Bb5 Bxb5 axb5
    35 +0.33 04:49 2857M Qe2 Be7 O-O O-O a4 Rac8 Ne5 Nb3 Ra2 Be8 Bg5 h6 Bf4 Ne4 Bxe4 dxe4 Qxe4 Bc6 Nxc6 bxc6 a5 Qb5 Nd2 c5 Nxb3 Qxb3 Rfa1 f5 Qe3 cxd4 Qxd4 Rfd8 Qa4 Qd5 Be3 Bc5
    36 +0.31 07:34 4533M Qe2 Be7 O-O O-O b3 Rac8 Rc1 Nc6 b4 Nh5 Be3 Qc7 Nbd2 Nf4 Bxf4 Qxf4 b5 Na5 Ne5 Rfd8 Nb3 b6 Nxa5 bxa5 a4 Qh6 g3 Be8 h4 g6 Kg2 Qg7 Rab1 f6 Ng4 Bd7 c4 dxc4 Rxc4
    37 +0.38 11:50 7125M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 Nb3 Ra2 a6 Bc2 Nd7 Re1 Nxe5 Bxe5 f6 Bf4 Bf7 Bg3 Na5 Nd2 Bd6 Qg4 Bxg3 Qxg3 Nc6 Nf3 Kh8 b3 Qc7 Qxc7 Rxc7 a5 h6 Raa1
    38 +0.32 14:28 8719M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 a6 b4 Nc4 Bxc4 dxc4 Nxd7 Nxd7 Nd2 Nf6 a5 Qc6 Bg5 Nd5 Bxe7 Nxe7 Rfc1 Nd5 g3 h6 Ne4 Rd8 Nc5 Qb5 Rc2 Rac8 Re1 Nf6 Rcc1 Nd5 h4 Rc7 Kg2 Rcc8 Qe4 Qc6 Qf3 Qc7
    39 +0.35 29:35 18172M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 h6 h3 Qb3 Bc1 Qb6 Nd2 Qc7 Bc2 Bd6 Re1 Nd7 Ndf3 Nf8 Ng4 h5 Ne3 f6 Nh4 a6 Bd2 Nc6 Qf3 Bf7 g3 Qd8 b4 g5 b5 Nxd4 cxd4 gxh4 gxh4
    40 +0.39 42:25 26083M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 h6 h3 Qb3 Bc1 Qb6 Nd2 Qc7 Bc2 Nd7 Ndf3 Nxe5 Nxe5 Nc6 Bf4 Nxe5 Bxe5 Bd6 Bxd6 Qxd6 a5 Bd7 Re1 b5 axb6 axb6 Bd3 Qe7 Qf3 Bc6 g3 b5 Rxa8 Rxa8 Kg2
    41 +0.36 50:09 30876M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 a6 b4 Nc6 Nd2 Qc7 Rdc1 Bd6 h3 Nd7 Nxc6 Qxc6 Bxd6 Qxd6 Nb3 Nf6 a5 Bc6 g3 h6 Nc5 Qc7 Re1 Nd7 h4 Re8 f4 Rac8 Kg2 g6 Qf3 Nxc5 dxc5 Bd7 Bc2
    42 +0.34 56:29 34813M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 Qb3 Re1 Qb6 b4 Nc4 Bxc4 dxc4 Bg5 Qc7 Bxf6 Bxf6 Nd2 Bc6 Nxc6 Qxc6 g3 g6 Qe4 Qxe4 Nxe4 Be7 Kg2 Kg7 Nd2 a6 a5 Rd8 f4 h5 h4 Rac8 Ne4 Bxb4 cxb4 c3 Nc5 Rxd4
    43 +0.34 1:00:00 37016M Qe2 Be7 O-O O-O Ne5 Rfc8 a4 Be8 Rd1 Qb3 Re1 Qb6 b4 Nc4 Bxc4 dxc4 Bg5 Qc7 Bxf6 Bxf6 Nd2 Bc6 Nxc6 Qxc6 g3 g6 Qe4 Qxe4 Nxe4 Be7 Kg2 Kg7 Nd2 a6 a5 Rd8 f4 h5 h4 Rac8 Ne4 Bxb4 cxb4 c3 Nc5 Rxd4
    Nodes: 37016501887
    Nodes/second: 10282347
    Best move: Qe2
    Ponder move: Be7
The position listed as ccr22:
[d]r3kb1r/pp1n1ppp/1q2p3/n2p4/3P1Bb1/2PB1N2/PPQ2PPP/RN2K2R w KQkq -
no doubt collected from here:
http://www.stmintz.com/ccc/index.php?id=31481
Does not match the description here:
"22. Caro-Kann defense. 1e4 c6 2d4 d5 3exd5 cxd5 4Bd3 Nc6 5c3 Nf6 6Bf4 Bg4 7Qb3 Na5 8Qa4+ Bd7 9Qc2 e6 10Nf3 Qb6. White to move. Solution 11a4! (from Fischer vs Petrosian). This prevents black from exchanging off his bad bishop by ...Bb5. This problem is very hard for computers, not surprising considering that the move was unknown by grandmasters until Fischer played it."
From this post:
http://www.stmintz.com/ccc/index.php?id=167129

And the correct solution for the given ccr22 (as opposed to the correct one) is clearly not a4 but the mundane looking Nbd2 (though the slightly poisonous pawn on h7 is no doubt tempting).
  • Searching: r3kb1r/pp1n1ppp/1q2p3/n2p4/3P1Bb1/2PB1N2/PPQ2PPP/RN2K2R w KQkq - 0 1
    infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0

    1 +1.07 00:00 48 O-O
    2 +1.02 00:00 177 Nbd2 a6 Bxh7
    3 +1.25 00:00 280 Nbd2 Bxf3 Nxf3
    4 +1.31 00:00 417 Nbd2 Bxf3 Nxf3 a6 Bxh7
    5 +1.71 00:00 973 Nbd2 h6 O-O Bxf3 Nxf3
    6 +0.83 00:00 3499 Nbd2 Bxf3 gxf3 Nc6 O-O h6
    7 +1.01 00:00 4875 Nbd2 Bxf3 Nxf3 h6 Nd2 g5 Bg3
    8 +0.93 00:00 6804 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 O-O Nc4 Bxh7
    9 +0.74 00:00 20220 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 Nd2 Nc6 O-O
    10 +0.67 00:00 32493 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 b4 Nc4 Bxc4 dxc4 Nd2 O-O
    11 +0.71 00:00 50059 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 Bxh7 g6 Bxg6 fxg6 Qxg6+ Kf8 O-O Nc6 h3 a6
    12 +0.53 00:00 117373 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 Bxh7 g6 Bxg6 fxg6 Qxg6+ Kd8 Ng5 Kc7 Nxe6+ Kb6 O-O-O Nc4
    13 +0.61 00:00 146771 Nbd2 Bxf3 Nxf3 Bd6 Bxd6 Qxd6 Bxh7 g6 Bxg6 fxg6 Qxg6+ Kd8 Ng5 Kc7 Nf7 Rxh2 Nxd6 Rxh1+ Kd2 Rxa1
    14 +0.62 00:00 237762 Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 O-O Bd6 Bxd6 Qxd6 Qe2 a6 Qxc4 O-O
    15 +0.56 00:00 428398 Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 Qa4 a6 O-O Qb5 Qc2 Be7 h3
    16 +0.66 00:00 658095 Nbd2 Bxf3 Nxf3 h6 Bg3 Be7 O-O O-O Rae1 Nc6 Qe2 a6 h3 Rac8 b3 Kh8
    17 +0.63 00:00 883571 Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 O-O Be7 Qa4 Qa6 Qxa6 bxa6 Nd2 O-O Rfe1 Rac8 a4
    18 +0.61 00:00 1545K Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 d5 exd5 O-O Bd6 Bxd6 Qxd6 Rfe1+ Kf8 Nd4 g6 h3 Kg8
    19 +0.56 00:00 1996K Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 Ne5 Qb5 O-O Be7 Qe2 O-O a4 Qd5 Nxd7 Qxd7 Be5 Rac8 Qg4 g5
    20 +0.30 00:02 8426K Nbd2 Bd6 Bxd6 Qxd6 Bxh7 Kf8 Bd3 e5 dxe5 Nxe5 O-O-O Bxf3 Nxf3 Nxf3 gxf3 Qf4+ Kb1 Qxf3 Qa4 Nc6 Bc2 Re8 Qb5 Re7 Qxd5 Qxf2
    21 +0.29 00:03 13423K Nbd2 Bd6 Bxd6 Qxd6 O-O Bxf3 Nxf3 h6 Rad1 O-O Rfe1 Nc6 g3 Rac8 a3 a6 Kg2 Rfe8 h3 Qc7 Qe2 e5 dxe5
    22 +0.47 00:05 19069K Nbd2 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 Ne5 Nxe5 Bxe5 a5 bxa5 Rxa5 O-O Qc6 f3 b5 Qe4 Qd5 Qxd5 exd5 Rfe1
    23 +0.38 00:07 30641K Nbd2 Bh5 O-O Bd6 Bxd6 Qxd6 Nh4 Bg6 Nxg6 hxg6 Nf3 Nc6 h3 O-O Rfe1 a6 a3 Qe7 Qe2 Rfc8 Kh1 Nf6 Kg1 Qc7
    24 +0.36 00:08 37829K Nbd2 Bh5 O-O Bd6 Bxd6 Qxd6 Nh4 Bg6 Nxg6 hxg6 Nf3 Nc6 Rfe1 O-O a3 a6 Re3 Rfc8 Rae1 Nf6 h3 Qe7 Qe2 b5 Ne5 Nxe5
    25 +0.40 00:10 55499K Nbd2 Bh5 O-O Bd6 Bxd6 Qxd6 Rfe1 Bg6 Ng5 O-O Bxg6 hxg6 h4 Nc6 Ndf3 Qf4 g3 Qf5 Qb1 Qxb1 Raxb1 Rac8 Kg2 Na5 Nd2 Nc6 a3 a6
    26 +0.36 00:14 97988K Nbd2 Bh5 O-O Bd6 Bxd6 Qxd6 Rae1 Bg6 Ng5 O-O Bxg6 hxg6 Ndf3 Rac8 h4 Qf4 g3 Qf5 Qd1 Nc6 Kg2 a6 a3 b5 Qd2 Nf6 Ne5
    27 +0.35 00:20 147349K Nbd2 Bh5 O-O Bd6 Bxd6 Qxd6 Rae1 Bg6 Ng5 O-O Bxg6 hxg6 Ndf3 Qf4 h4 a6 g3 Qf5 Qe2 Nc6 Kg2 Rac8 Rh1 Rc7 a3 Rfc8 h5 gxh5 Rxh5 Nf6 Rhh1
    28 +0.30 00:28 230107K Nbd2 Bh5 O-O Rc8 Rfe1 Nc6 Qb1 Be7 h3 Bg6 Bxg6 hxg6 a4 O-O Qd3 a6 b4 Nf6 Rab1 Qd8 b5 Na5 Ne5 Nd7 bxa6 bxa6 Bh2 Nxe5 Bxe5
    29 +0.33 00:31 255920K Nbd2 Bh5 O-O Rc8 Rfe1 Nc6 Qb1 Be7 h3 Bg6 Bxg6 hxg6 Qd3 Na5 Rab1 O-O b3 Qd8 a4 a6 Re3 Nf6 Rbe1 Nh5 Bh2 Nc6 b4 Nf6 a5 Qd7 Bg3
    30 +0.27 00:53 466806K Nbd2 Bd6 Bg3 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 a4 O-O O-O Rfd8 Bxd6 Qxd6 Rfe1 Qc7 a5 b5 axb6 axb6 b5 Qb7 Qb2 Rxa1 Rxa1 Qd5 Ra7 Nf6 h3
    31 +0.29 01:00 542168K Nbd2 Bd6 Bg3 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 a4 O-O O-O Rfd8 Bxd6 Qxd6 Rfe1 Qc7 h3 Nf6 Ne5 Rac8 a5 Nd5 Qd2 Qe7 b5 f6 Ng6 Qe8 Nf4 Nxf4 Qxf4 Qxb5 Rxe6
    32 +0.26 01:09 627890K Nbd2 Bd6 Bg3 Bxf3 Nxf3 h6 b4 Nc4 Bxc4 dxc4 a4 O-O O-O Rfd8 Bxd6 Qxd6 Rfe1 Qc7 h3 Nf6 Ne5 Rac8 Re3 Nd7 Rae1 Nxe5 Rxe5 b6 a5 Qb7 Qe4 Qxe4 R1xe4 Rd5 axb6 Rxe5 dxe5
    33 +0.30 04:01 2407M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bxf3 Nxf3 h6 Nh4 O-O f4 a6 Rae1 Nf6 Qd2 Nh5 Qf2 Rac8 g3 Nf6 Nf3 Ne4 Bxe4 dxe4 Rxe4 Qd5 Ree1 Qxa2 Qg2 Qd5 Ne5 Rfe8 Qxd5 exd5
    34 +0.22 04:26 2662M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rae1 Rc8 a3 Bg6 Bxg6 hxg6 Rd1 O-O Rfe1 Qc7 g3 a6 Kg2 Nf6 Qa4 Qb6 Qb3 Qc7 Ng5 Na5 Qb4 Nc6 Qa4 Nh7 Ngf3 Nf6 Qc2 Rfd8
    35 +0.22 05:31 3338M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 a6 Qd1 O-O g3 Ne7 Kg2 Nf5 Nf3 Nd6 Ne5 Rfd8 Qe2 Qb6 Qf3 Qb5 Qe3
    36 +0.22 05:52 3556M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 a6 Qd1 O-O Qe2 Rfd8 g3 Na5 Kg2 Qb6 Qf3 Nc4 Nxc4 Rxc4 Qf4 Rdc8 Qh4 Qb5
    37 +0.25 06:38 4018M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 O-O g3 Rfd8 Kg2 a6 h4 Na5 Qd1 Nc4 Nxc4 dxc4 Qf3 b5 Re5 Qe7 Rd1 Qf6 Rde1
    38 +0.24 07:48 4743M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 O-O g3 Rfd8 Kg2 a6 h4 Na5 Qd1 Nc4 Nxc4 dxc4 Qf3 b5 Re5 Qb8 Rbe1 Qd6 Rd1 Qb6 Ree1 Qd6
    39 +0.24 09:06 5533M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 O-O g3 Rfd8 Kg2 a6 h4 Na5 Qd1 Nc4 Nf3 Qb6 Qe2 Qc7 Ng5 Re8 Qc2 Qe7 Rbd1 Qd7
    40 +0.22 12:32 7535M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Ree1 Qc7 Rab1 Qd7 Nb3 b6 Nd2 Na5 Qd1 Nb7 Qe2 Nd6 Rbd1 O-O Nf3 Nc4 g3 Rfd8 Kg2 Qb5 Rb1 Rc7 Ne5 Rdc8
    41 +0.22 38:32 24271M Nbd2 Bd6 Bxd6 Qxd6 O-O Nc6 h3 Bh5 Rfe1 Rc8 a3 Nf6 Qa4 Nd7 Ne5 Ndxe5 Rxe5 Bg6 Bxg6 hxg6 Re2 Qd7 Rd1 b6 Rde1 Ne5 Qc2 Nc4 Nxc4 Rxc4 Qd2 Rc8 Qg5 a5 f3 O-O Kh1 Rfe8 Kg1 Qc7 Qh4 a4 Kh1 Qc4
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: 1 Hour CCR Test revisited

Post by Dann Corbit »

Vinvin wrote:
Peter Berger wrote:...
CCR 2 used to be completely non-controversial. Bc8 might indeed be the best move, but the pawn-sac Sc6 is a very serious alternative that seems to offer pretty decent compensation. White probably has nothing more than sufficient compensation for the pawn when he takes.
...
I made an overnight analyze (577 billions nodes) with Stockfish in December, Nc6 was the best move :
http://www.talkchess.com/forum/viewtopi ... 317#599317

Code: Select all

 46/76   17:07:29   577.283.145k   9.364k   +0,30   1. ... e6
 46/76   17:07:29   577.283.145k   9.364k   +0,27   1. ... Fc8 2.Cf3 Cc6 3.Fd2 e6 4.Fd3 Fd7 5.0-0 Fe7 6.Tfc1 0-0 7.a3 a6 8.Dd1 Tc8 9.Ce5 g6 10.Cxd7 Cxd7 11.Fe1 Cb6 12.Ce2 Fd6 13.Db3 Te8 14.g3 Dc7 15.Fb4 Fxb4 16.axb4 Ta8 17.b5 axb5 18.Fxb5 Txa1 19.Txa1 Cd7 20.Cf4 Tc8 21.Cd3 Rg7 22.Rg2 Db6 23.Tc1 Cf6 24.Cc5 Ce7 25.Ta1
 46/76   17:07:29   577.283.145k   9.364k   +0,12   1. ... Cc6 2.Dxb7 Fd7 3.Db3 Tb8 4.Dd1 e5 5.Cf3 Fd6 6.dxe5 Cxe5 7.Cd4 0-0 8.Fe2 Ce4 9.0-0 Cxc3 10.bxc3 Dh4 11.f4 Cg4 12.Fxg4 Fxg4 13.Dd3 Fd7 14.Fd2 Tb6 15.Tfb1 De7 16.Tb3 Fc5 17.Te1 Te8 18.Teb1 Tc8 19.Fe1 De4 20.Dxe4 dxe4 21.f5 f6 22.g4 Rf7 23.h3 g6 24.fxg6+ hxg6 25.Rg2 f5 26.Txb6 Fxb6 27.gxf5 gxf5 28.Fd2 Rf6
My search was one ply less, but I had Bc8. I think we can safely say that #2 is unclear.
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