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Chessmetrics Player Profile: Coenraad Zuidema
   Born:    -
   Best World Rank:    #149 (on the August 1974 rating list)
   Highest Rating:    2550 on the August 1974 rating list, #149 in world
   Best Individual Performance:    2594 in Hoogovens-B Wijk aan Zee, 1971, scoring 8/13 (62%) vs 2520-rated opposition
  (no graph available)   Best Performances   Career Details   Event Details   Ratings only
    Event Name  Rating   Performance   Overall Results   Actual Results vs Rated Opponents   +/- Predicted 
    WchT U26 07th Leningrad, 1960  not rated on January 1960 list   [2354]   -2 (3.5/9, 39%)   -3 (0/3, 0%) vs 2497-rated opposition   N/A 
    Wch U20 fin-A The Hague, 1961  not rated on January 1961 list   [2472]   +3 (7/11, 64%)   = (0.5/1, 50%) vs 2507-rated opposition   N/A 
    Wch U20 prel-B The Hague, 1961  not rated on January 1961 list   [2564]   +2 (4/6, 67%)   +1 (1/1, 100%) vs 2569-rated opposition   N/A 
    Zuerich, 1962  2370 (#488 on January 1962 list)   [2323]   +2 (6.5/11, 59%)   = (0.5/1, 50%) vs 2268-rated opposition   -0.1 
    Hoogovens-B Beverwijk, 1963  2421 (#377 on January 1963 list)   2477   +3 (6/9, 67%)   +2 (4.5/7, 64%) vs 2393-rated opposition   +0.8 
    IBM-B Amsterdam, 1963  2421 (#377 on January 1963 list)   2408   +2 (5.5/9, 61%)   -1 (2.5/6, 42%) vs 2426-rated opposition   -0.5 
    NED-ch21 The Hague, 1963  2421 (#377 on January 1963 list)   [2486]   +1 (1/1, 100%)   +1 (1/1, 100%) vs 2444-rated opposition   +0.5 
    Belgrade, 1964  2481 (#243 on January 1964 list)   2504   -7 (5/17, 29%)   -7 (5/17, 29%) vs 2626-rated opposition   -0.6 
    Beverwijk (Hoogovens), 1964  2481 (#243 on January 1964 list)   2544   -2 (6.5/15, 43%)   -2 (6.5/15, 43%) vs 2578-rated opposition   +0.7 
    Zuerich U18, 1964  2481 (#243 on January 1964 list)   2390   = (5.5/11, 50%)   -1 (2/5, 40%) vs 2410-rated opposition   -0.9 
    Clare Benedict Cup 11th Lenzerheide, 1964  2483 (#218 on July 1964 list)   [2333]   -1 (1.5/4, 38%)   -2 (0.5/3, 17%) vs 2408-rated opposition   -1.3 
    Tel Aviv ol (Men) fin-A, 1964  2468 (#248 on November 1964 list)   2488   -1 (5.5/12, 46%)   -3 (3.5/10, 35%) vs 2568-rated opposition   -0.3 
    Tel Aviv ol (Men) prel, 1964  2468 (#248 on November 1964 list)   [2535]   +3 (3.5/4, 88%)   = (0.5/1, 50%) vs 2608-rated opposition   +0.2 
    EU-chT (Men) Hamburg, 1965  2470 (#259 on January 1965 list)   2510   -3 (3.5/10, 35%)   -3 (3.5/10, 35%) vs 2593-rated opposition   =0.0 
    IBM Amsterdam, 1965  2470 (#259 on January 1965 list)   2500   -2 (3.5/9, 39%)   -2 (3.5/9, 39%) vs 2559-rated opposition   -0.1 
    NED-ch22 The Hague, 1965  2470 (#259 on January 1965 list)   2516   +3 (5.5/8, 69%)   +1 (3.5/6, 58%) vs 2483-rated opposition   +0.6 
    Clare Benedict Cup 12th Berlin West, 1965  2471 (#259 on April 1965 list)   [2400]   = (2.5/5, 50%)   -1 (1/3, 33%) vs 2442-rated opposition   -0.6 
    Amsterdam (IBM), 1966  2473 (#251 on January 1966 list)   2544   = (4.5/9, 50%)   = (4.5/9, 50%) vs 2548-rated opposition   +0.8 
    Le Havre-B, 1966  2479 (#243 on April 1966 list)   [2505]   +3 (3.5/4, 88%)   +2 (2/2, 100%) vs 2401-rated opposition   +0.8 
    Clare Benedict Cup 13th Brunnen, 1966  2493 (#202 on May 1966 list)   2562   +2 (3.5/5, 70%)   +2 (3.5/5, 70%) vs 2497-rated opposition   +1.0 
    WchT U26 prel 13th Oerebro, 1966  2507 (#172 on July 1966 list)   [2514]   = (1/2, 50%)   = (1/2, 50%) vs 2556-rated opposition   +0.1 
    WchT U26 fin-A 13th Oerebro, 1966  2504 (#178 on August 1966 list)   2413   -4 (3/10, 30%)   -4 (3/10, 30%) vs 2506-rated opposition   -2.0 
    La Habana ol (Men) fin-B Havana, 1966  2474 (#246 on October 1966 list)   2509   +6 (8.5/11, 77%)   +2 (4.5/7, 64%) vs 2434-rated opposition   +0.7 
    La Habana ol (Men) prel Havana, 1966  2474 (#246 on October 1966 list)   [2440]   +2 (3.5/5, 70%)   -1 (0.5/2, 25%) vs 2516-rated opposition   -0.4 
    Amsterdam (IBM), 1967  2480 (#238 on January 1967 list)   2492   -3 (4/11, 36%)   -3 (3.5/10, 35%) vs 2573-rated opposition   -0.4 
    NED-ch Zierikzee, 1967  2480 (#238 on January 1967 list)   2507   = (5.5/11, 50%)   = (4/8, 50%) vs 2504-rated opposition   +0.2 
    Vrnjacka Banja zt, 1967  2480 (#238 on January 1967 list)   2483   -2 (7.5/17, 44%)   -3 (6/15, 40%) vs 2529-rated opposition   -0.6 
    FRG-NED Krefeld, 1967  2478 (#240 on April 1967 list)   [2535]   = (0.5/1, 50%)   = (0.5/1, 50%) vs 2607-rated opposition   +0.2 
    Amsterdam (IBM), 1968  2488 (#220 on July 1968 list)   2418   -8 (3.5/15, 23%)   -8 (3.5/15, 23%) vs 2566-rated opposition   -2.6 
    Amsterdam AMRO op, 1969  2448 (#323 on January 1969 list)   [2288]   +2 (4/6, 67%)   -1 (1/3, 33%) vs 2283-rated opposition   -1.1 
    IBM-B Amsterdam, 1969  2448 (#323 on January 1969 list)   2474   = (5.5/11, 50%)   -1 (3.5/8, 44%) vs 2500-rated opposition   =0.0 
    NED-ch Leeuwarden, 1969  2448 (#323 on January 1969 list)   2521   +1 (6/11, 55%)   +1 (3.5/6, 58%) vs 2489-rated opposition   +0.8 
    NED-ch Leeuwarden, 1970  2444 (#365 on January 1970 list)   2462   +5 (11.5/18, 64%)   +1 (7.5/14, 54%) vs 2415-rated opposition   =0.0 
    Clare Benedict Cup 17th Paignton, 1970  2447 (#357 on April 1970 list)   [2477]   +1 (3/5, 60%)   = (2/4, 50%) vs 2484-rated opposition   +0.2 
    Siegen ol (Men), 1970  2469 (#288 on September 1970 list)   2474   +1 (7.5/14, 54%)   -1 (2/5, 40%) vs 2522-rated opposition   -0.2 
    Hoogovens-B Wijk aan Zee, 1971  2484 (#277 on January 1971 list)   2594   +3 (9/15, 60%)   +3 (8/13, 62%) vs 2520-rated opposition   +2.0 
    IBM-B Amsterdam, 1971  2514 (#201 on July 1971 list)   2504   = (5.5/11, 50%)   -1 (4.5/10, 45%) vs 2526-rated opposition   -0.4 
    NED-ch Leeuwarden, 1972  2533 (#159 on January 1972 list)   2571   +6 (8.5/11, 77%)   +2 (4.5/7, 64%) vs 2513-rated opposition   +0.8 
    NED-chT, 1972  2533 (#159 on January 1972 list)   -   -1 (0/1, 0%)   no games vs rated opposition   N/A 
    Vienna (Clare Benedict Cup), 1972  2545 (#162 on May 1972 list)   2475   -2 (1.5/5, 30%)   -2 (1.5/5, 30%) vs 2571-rated opposition   -0.8 
    Skopje ol (Men) fin-A, 1972  2542 (#167 on September 1972 list)   2553   -1 (4/9, 44%)   -1 (4/9, 44%) vs 2591-rated opposition   =0.0 
    Skopje ol (Men) prel, 1972  2542 (#167 on September 1972 list)   [2414]   +2 (3.5/5, 70%)   = (1.5/3, 50%) vs 2401-rated opposition   -0.5 
    NED-ch Leeuwarden, 1973  2534 (#173 on January 1973 list)   2574   +4 (9.5/15, 63%)   +4 (7/10, 70%) vs 2459-rated opposition   +1.1 
    Wijk aan Zee (Hoogovens), 1973  2534 (#173 on January 1973 list)   2563   -3 (6/15, 40%)   -3 (6/15, 40%) vs 2622-rated opposition   +0.1 
    Amsterdam Sen-Jun, 1973  2549 (#154 on March 1973 list)   -   = (0.5/1, 50%)   no games vs rated opposition   N/A 
    Hoogovens M-4K Wijk aan Zee, 1974  2537 (#160 on January 1974 list)   [2467]   +2 (2.5/3, 83%)   +1 (1.5/2, 75%) vs 2416-rated opposition   +0.2 
    NED-SWE telex, 1975  2532 (#192 on January 1975 list)   [2470]   +1 (1/1, 100%)   +1 (1/1, 100%) vs 2418-rated opposition   +0.4