Author: Joachim Rang
Date: 11:15:40 01/10/06
Go up one level in this thread
On January 10, 2006 at 10:50:28, Peter Kasinski wrote: >I have completed an exhaustive search for all 6-man positions reached in two >large databases. Sources: > >- Big Database 2006 with updates until Jan ’06 for 3,216,177 games. >- SSDF database (Big and New) for 22,949 games. > >I have found these sources to be generally consistent in determining the most >frequently occurring 6-man positions: > >a) Top three tablebases are the same (with no. 1 and 2 switching places). >b) Of the 30 most frequently occurring 6-man positions, 29 are the same in both >sources. > >That said, there are some key differences. In human games 6-man positions were >found in only 198,884, or just 6.18 % of games. In contrast, comp-comp games >reached 6-man positions in 9,926 of 22,949, representing 43.25% of all games. > >Another difference is in the more even distribution of 6-man positions in >comp-comp games. To illustrate: one would need only 42 TBs files to cover over >90% of cases occurring in human games. To reach the same 90% mark in comp-comp >games one would need a set of 83 tablebases. > >Top 50 TBs from human games: > > 1 krppkr 27,902 14.029% > 2 krpkrp 25,779 12.962% > 3 kppkpp 19,150 9.629% > 4 kpppkp 8,474 4.261% > 5 kbpkpp 7,043 3.541% > 6 krpkpp 6,966 3.503% > 7 knpkpp 6,487 3.262% > 8 kbpknp 5,389 2.710% > 9 krpkbp 4,648 2.337% > 10 kqpkpp 4,630 2.328% > 11 kbppkb 3,680 1.850% > 12 krppkp 3,529 1.774% > 13 knppkn 3,528 1.774% > 14 kbppkp 3,499 1.759% > 15 knppkp 3,098 1.558% > 16 krpknp 3,095 1.556% > 17 knppkb 3,083 1.550% > 18 knpknp 2,910 1.463% > 19 kqpkqp 2,823 1.419% > 20 kbpkbp 2,525 1.270% > 21 kbppkn 2,514 1.264% > 22 kqppkq 2,302 1.157% > 23 kqppkp 2,240 1.126% > 24 krbpkr 2,181 1.097% > 25 kpppkr 2,168 1.090% > 26 krbkrp 2,017 1.014% > 27 kqpkrp 1,909 0.960% > 28 krnpkr 1,875 0.943% > 29 kbppkr 1,644 0.827% > 30 krnkrp 1,555 0.782% > 31 kqrkrp 1,521 0.765% > 32 kpppkn 1,243 0.625% > 33 knppkr 1,208 0.607% > 34 kpppkb 1,124 0.565% > 35 kpppkq 1,027 0.516% > 36 krppkb 805 0.405% > 37 krppkq 789 0.397% > 38 krpppk 719 0.362% > 39 kqrpkr 670 0.337% > 40 krppkn 651 0.327% > 41 kqpknp 549 0.276% > 42 kqpkbp 531 0.267% > 43 kbnpkr 494 0.248% > 44 kqpppk 479 0.241% > 45 kppppk 456 0.229% > 46 kbnpkb 424 0.213% > 47 kbpppk 416 0.209% > 48 krrkrp 400 0.201% > 49 kqbpkp 396 0.199% > 50 kqrpkp 381 0.192% > >...and top 50 from comp-comp games: > > 1 krpkrp 1,148 11.566% > 2 krppkr 690 6.951% > 3 kppkpp 460 4.634% > 4 kbpknp 299 3.012% > 5 kbpkpp 289 2.912% > 6 krpkpp 276 2.781% > 7 kqppkp 265 2.670% > 8 kpppkp 252 2.539% > 9 kbpkbp 238 2.398% > 10 krbkrp 219 2.206% > 11 knpkpp 207 2.085% > 12 krppkp 199 2.005% > 13 krpkbp 199 2.005% > 14 kbppkp 189 1.904% > 15 kqpkqp 186 1.874% > 16 kqpkpp 186 1.874% > 17 krnkrp 178 1.793% > 18 knpknp 156 1.572% > 19 krbpkr 132 1.330% > 20 knppkp 131 1.320% > 21 krpknp 120 1.209% > 22 kbppkb 116 1.169% > 23 kqpkrp 108 1.088% > 24 krnpkr 106 1.068% > 25 knppkb 103 1.038% > 26 kpppkr 100 1.007% > 27 kqrpkr 96 0.967% > 28 kqppkq 91 0.917% > 29 kbppkr 91 0.917% > 30 knppkn 84 0.846% > 31 kqrkrp 84 0.846% > 32 kbppkn 83 0.836% > 33 kqbpkp 80 0.806% > 34 kqrpkp 79 0.796% > 35 krppkb 77 0.776% > 36 kqqpkp 70 0.705% > 37 kqpkbp 65 0.655% > 38 krbpkp 59 0.594% > 39 kqppkr 58 0.584% > 40 knppkr 58 0.584% > 41 krbkrn 56 0.564% > 42 krppkn 55 0.554% > 43 krppkq 53 0.534% > 44 kpppkn 47 0.474% > 45 kpppkb 45 0.453% > 46 kqqppk 44 0.443% > 47 krrkrp 44 0.443% > 48 kqbppk 43 0.433% > 49 kqpppk 43 0.433% > 50 kqnpkp 42 0.423% > >For those interested in seeing all results, I have posted them in the new CCRL >Discussion Board Forum organized by Kirill Kryukov. For those looking to share >Tablebases online this is a great new place to visit. > >Cheers, >PK Hi Peter, an interesting analysis thanks! I wonder if there are more games from SSDF available. 22.000 seems very little out of 1 million total played. I'm really stunned that more than 40% of the games in SSDF reached 6-men or fewer. That means almost every second game. I would be curious how your statistic would look like for the Comp2005 from Walter Eigenmann. The Comp2005 contains 350.000 computer games only since 2000 and only for longer time controls. If you like you can have a look: http://www.beepworld.de/members38/eigenmann/comp2005.htm regards Joachim
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.