TCEC Season 6 - Stage 1c now live

[Martin Thoresen]

Congratulations to Naum, Stockfish, Fire, Shredder and Spike for qualifying for Stage 2 after Stage 1b ended late last night.
Equinox is still the best 6th placed engine so unless the 6th best engine in 1c can score at least 7 points, it will qualify for Stage 2 as well.

Code: Select all

 N Engine           Elo  Pts    SB Na St Fi Sh Sp To Ni Tg Ex Ar Ne Ja

 1 Naum 4.6         3053 9.0 43.25    =  =  1  =  1  1  1  =  1  1  1 
 2 Stockfish 180214 3181 9.0 43.00 =     1  =  =  =  1  1  1  1  1  1 
 3 Fire 3.1         3102 8.0 35.25 =  0     =  1  =  =  1  1  1  1  1 
 4 Shredder 12      2966 6.5 31.25 0  =  =     =  1  =  1  0  1  1  = 
 5 Spike 1.4        2935 6.5 30.75 =  =  0  =     =  1  =  =  1  =  1 
 6 Tornado 5        2809 6.0 26.50 0  =  =  0  =     =  1  =  1  =  1 
 7 Nightmare 7.8    2880 6.0 23.75 0  0  =  =  0  =     1  1  =  1  1 
 8 Toga II 010214   2759 4.5 13.75 0  0  0  0  =  0  0     1  1  1  1 
 9 Exchess 7.18b    2696 4.0 19.50 =  0  0  1  =  =  0  0     0  =  1 
10 Arasan 16.3      2466 3.0 10.00 0  0  0  0  0  0  =  0  1     1  = 
11 Nebula 2         2097 2.5  9.25 0  0  0  0  =  =  0  0  =  0     1 
12 Jazz 799         2371 1.0  4.75 0  0  0  =  0  0  0  0  0  =  0    

All the games can of course be found in the Archive page and downloaded from there:
http://tcec.chessdom.com/archive.php

Stage 1c:
16 cores, ponder off. Up to 16 GB hash. Time control is 120' + 30".
Single round robin.
Top 5 qualifies for Stage 2 (+6th best placed in 1a, 1b and 1c combined)

http://tcec.chessdom.com/live.php

Full rules can be read on the TCEC website, click "Help" in the top menu then "Rules & Information".

Code: Select all

 N Engine           Elo  Pts   SB Pr Sc Ry Sp Th Oc Al Ko Ch Jo Ju Cr

 1 Protector 1.6b12 2928 0.0 0.00                                    
 2 Scorpio 2.77     2769 0.0 0.00                                    
 3 Rybka 4.1        3131 0.0 0.00                                    
 4 Spark 1          2800 0.0 0.00                                    
 5 The Baron 3.36   2661 0.0 0.00                                   
 6 Octochess 5374   2367 0.0 0.00                                  
 7 Alfil 14.1       2335 0.0 0.00                                    
 8 Komodo 1188      3177 0.0 0.00                                   
 9 Chiron 2         3008 0.0 0.00                                    
10 Jonny 6          2930 0.0 0.00                                   
11 Junior 13.3      2977 0.0 0.00                                    
12 Crafty 23.8      2482 0.0 0.00                                   

[Isaac]

All the games can of course be found in the Archive page and downloaded from there:
http://tcec.chessdom.com/archive.php

In the game Scorpio-Crafty, one can see that for most moves, both engines reached exactly 2147.5 M nodes and then made their move instantly.

Is that a coincidence, a bug or something else? I think that the probability for this to happen is lower than 1 divided by 1 mole.

[Martin Thoresen]

In the game Scorpio-Crafty, one can see that for most moves, both engines reached exactly 2147.5 M nodes and then made their move instantly.

Is that a coincidence, a bug or something else? I think that the probability for this to happen is lower than 1 divided by 1 mole.

Interesting observation. This behavior seems to be prominent in the start and middle of the game only. I have no good explanation other than both of these engines are using the Wb2Uci adapter which to me implies this as a source for these numbers.

[michiguel]

In the game Scorpio-Crafty, one can see that for most moves, both engines reached exactly 2147.5 M nodes and then made their move instantly.

Is that a coincidence, a bug or something else? I think that the probability for this to happen is lower than 1 divided by 1 mole.

Interesting observation. This behavior seems to be prominent in the start and middle of the game only. I have no good explanation other than both of these engines are using the Wb2Uci adapter which to me implies this as a source for these numbers.

It must be maxing out at 2^31, which is 2147483648 nodes, the size of an integer in 32 bits. I was thinking of writing an xbii2uci adapter to experiment (XB protocol II to UCI) and may end up doing it...

Miguel

[Isaac]

Thank you guys. That is funny
Does this mean that they cannot think any further than that number of nodes? I have checked all moves and there is no move with a greater number of nodes than 2147.5 millions.

[Martin Thoresen]

Thank you guys. That is funny
Does this mean that they cannot think any further than that number of nodes? I have checked all moves and there is no move with a greater number of nodes than 2147.5 millions.

No, the adapter comes in after the engine output. So it has no impact on performance nor does it set any limits of any kind. It simply means that if the actual node number is higher than 2147.5 then the adapter simply rounds down to this number before sending this value to cutechess.

[michiguel]

Thank you guys. That is funny
Does this mean that they cannot think any further than that number of nodes? I have checked all moves and there is no move with a greater number of nodes than 2147.5 millions.

I do not think an adapter will influence when an engine should stop thinking based on nodes, unless the implementation is really screwy (is that a word?), but it could just report that maximum no matter how many nodes it receives. I am just speculating.

Miguel

[Isaac]

Thanks once more guys!

[Martin Thoresen]

It must be maxing out at 2^31, which is 2147483648 nodes, the size of an integer in 32 bits. I was thinking of writing an xbii2uci adapter to experiment (XB protocol II to UCI) and may end up doing it...
Miguel

That would be great Miguel. I would gladly help you test it. I was not aware of the limitation of Wb2Uci before, actually. :S

[Martin Thoresen]

Standings after 5 of 11 rounds:

Code: Select all

N  Engine           Elo  Pts Gm    SB Pr Ju Ko Ry Ch Sc Sp Th Jo Al Oc Cr

 1 Protector 1.6b12 2928 4.5  5 10.00       =        1  1     1     1    
 2 Junior 13.3      2977 4.0  5  8.00          =  1        =  1     1    
 3 Komodo 1188      3177 4.0  5  8.00 =           1  =           1     1 
 4 Rybka 4.1        3131 3.0  5  6.25    =        0        1  =  1       
 5 Chiron 2         3008 2.5  5  5.50    0  0  1           =        1    
 6 Scorpio 2.77     2769 2.5  5  5.00 0     =           1     0        1 
 7 Spark 1          2800 2.5  5  2.75 0              0        1  =     1 
 8 The Baron 3.36   2661 2.0  5  4.25    =     0  =              =     = 
 9 Jonny 6          2930 1.5  5  4.00 0  0     =     1  0                
10 Alfil 14.1       2335 1.5  5  3.00       0  0        =  =        =    
11 Octochess 5374   2367 1.5  5  1.25 0  0        0              =     1 
12 Crafty 23.8      2482 0.5  5  1.00       0        0  0  =        0