Author: Mike Byrne
Date: 17:28:10 06/02/04
Go up one level in this thread
On June 02, 2004 at 17:16:15, Dan Wulff wrote:
>Hi!
>
>I've been thinking about using performance rating to select moves for Gandalf's
>opening book, but I cannot seem to find the correct way to calculate the
>performance rating od a given move.
>
>Say a 2600 player wins a game against an 2500 opponent, starting with 1. e4,
>what would the performance rating be after that ??
>
>I've been looking at the ratings in the CB GUI, but sometimees, when only one
>game has been played, the Performance is over 3200, which I cannot seem to fit
>into the ELO rating formula, where the highest possible gain/loss for a single
>game is 16 ELO points.
>
>Am I going about this in a completely wrong manner, or does performance rating
>have nothing whatsoever to do with ELO rating ??
>
>Greetings
>
>Dan Wulff
>(The Gandalf Team)
A simplified method to calcualte rating performance is to take all the opponents
ratings and subtract 400 points as the base. Then for every draw add 400 points
and for every win add 800 points as a bonus.
e.g.
(simple)
all e4 games
(result of white
w/l/d opponent rating base bonus total
w 2600 2200 800 3000
l 2600 2200 0 2200
d 2600 2200 400 2600
1-1-1 2600 6600 1200 7800/3 == 2600
more complex example
result (1,0l,0.5) opp rating base bonus pref
rating
0 2562 2162 0 2162
1 2433 2033 800 2833
1 2449 2049 800 2849
1 2581 2181 800 2981
0.5 2552 2152 400 2552
1 2592 2192 800 2992
1 2587 2187 800 2987
1 2401 2001 800 2801
0 2414 2014 0 2014
1 2575 2175 800 2975
0.5 2430 2030 400 2430
0.5 2590 2190 400 2590
0 2459 2059 0 2059
0 2491 2091 0 2091
0.5 2468 2068 400 2468
0 2540 2140 0 2140
1 2597 2197 800 2997
0 2470 2070 0 2070
1 2571 2171 800 2971
0.5 2571 2171 400 2571
0.5 2481 2081 400 2481
0 2483 2083 0 2083
0.5 2529 2129 400 2529
1 2409 2009 800 2809
1 2459 2059 800 2859
0.5 2408 2008 400 2408
0 2448 2048 0 2048
0.5 2508 2108 400 2508
0 2465 2065 0 2065
0.5 2435 2035 400 2435
0 2437 2037 0 2037
0.5 2415 2015 400 2415
0.5 2455 2055 400 2455
0.5 2562 2162 400 2562
0.5 2497 2097 400 2497
0.5 2454 2054 400 2454
0 2406 2006 0 2006
0.5 2585 2185 400 2585
0.5 2445 2045 400 2445
0.5 2474 2074 400 2474
0 2445 2045 0 2045
0.5 2464 2064 400 2464
1 2547 2147 800 2947
0 2542 2142 0 2142
1 2539 2139 800 2939
1 2541 2141 800 2941
1 2456 2056 800 2856
1 2564 2164 800 2964
0.5 2431 2031 400 2431
0.5 2515 2115 400 2515
0.5 2476 2076 400 2476
0 2515 2115 0 2115
0.5 2528 2128 400 2528
1 2425 2025 800 2825
0 2482 2082 0 2082
0.5 2525 2125 400 2525
0.5 2512 2112 400 2512
0 2469 2069 0 2069
0.5 2524 2124 400 2524
1 2459 2059 800 2859
0 2472 2072 0 2072
0 2462 2062 0 2062
0.5 2426 2026 400 2426
0.5 2524 2124 400 2524
0.5 2403 2003 400 2403
0.5 2447 2047 400 2447
0 2555 2155 0 2155
1 2542 2142 800 2942
0.5 2426 2026 400 2426
1 2472 2072 800 2872
0.5 2538 2138 400 2538
1 2589 2189 800 2989
0.5 2580 2180 400 2580
1 2408 2008 800 2808
1 2576 2176 800 2976
0 2439 2039 0 2039
1 2456 2056 800 2856
0 2587 2187 0 2187
0.5 2546 2146 400 2546
0.5 2411 2011 400 2411
1 2425 2025 800 2825
1 2511 2111 800 2911
1 2545 2145 800 2945
0.5 2404 2004 400 2404
0.5 2501 2101 400 2501
1 2485 2085 800 2885
1 2576 2176 800 2976
0.5 2577 2177 400 2577
0.5 2452 2052 400 2452
0.5 2466 2066 400 2466
0.5 2473 2073 400 2473
0.5 2425 2025 400 2425
0.5 2511 2111 400 2511
1 2439 2039 800 2839
0 2491 2091 0 2091
1 2596 2196 800 2996
0.5 2564 2164 400 2564
0 2549 2149 0 2149
1 2515 2115 800 2915
==============================================================
total or avg 54 2470 2074 432 2531
there are other ways to do this, but this is very simple to set up in a
speadsheet as you mulitly the bonus by the result (1,0,1/2) add the base (opp
rating -400) to get the indivual game perfroamce rating and then just average
the performace ratings
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