John A Grefe

Thumbnail photo of John A Grefe
Fide Id2000873
USCF Id10488079
TitleInternational Master
FederationUSA fed
FIDE Elo2316 
Highest 2470 (May 1974)
National Elo2340
Born 06.Sep.1947  (Age 71)
 Ranking: World #4427, Americas #485, USA #152
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Chess games of John A Grefe:    PGN Database (JohnAGrefe.pgn)  [231 games]

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Play Style

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Opening (White) Realtime (beta)Opening (Black) Realtime (beta)
Sicilian defence (25%): B50 B41 B42 B21 B40 B23Sicilian defence (32%): B30 B76 B41 B51 B20 B84
English (20%): A20 A10 A28 A16 A27 A13Reti (14%): A04 A05 A04
Ruy Lopez (10%): C69 C91 C60 C69 C73 C67King's Indian (11%): E81 E82 E97 E81 E73 E97
French defence (9%): C18 C18 C17 C16 C16 C03Queen's pawn (9%): A46 A46 A45 D02 A40 A45
Caro-Kann defence (5%): B11 B10 B19 B11English (7%): A22 A16 A34 A15 A10
Play tendenciesEndgame tendencies
Sacrifices: Not availableAverage draws at: Move #28 (details)
Blunders (): Explore blunders Optimal play: Not available
Positional player: Not available Optimal checkmate: Not available
Exchange tendencies: -2.259 (details) Endgame blunders: Not available.
Stockfish first line: Not available [calculate] Strength:         
Quality of play:  86.8 (games[what is this?] Exploitive analysis: Not available
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Live Games

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Chess Games

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Rating History ()

The graph shows John A Grefe's rating history vs. the World #100 (age considered) for each rating period (read more ...)

Tournament History

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Tournament (Click on name for details) VenueDate
Vassily Smyslov Memorial San Francisco, USA2010.06.012330
10th Annual Reno - Far West Open Reno, USA2010.04.021990
Spring Tuesday Night Marathon San Francisco, USA2010.03.161550
Alan Benson IM Norm San Francisco, USA2008.08.162350
Spring TNM San Francisco, USA2008.03.181300
Winter TNM San Francisco, USA2008.01.081160
Exchange Bank Fall Classic (Open) San Rafael, USA2007.10.27720
Fall TNM San Francisco, USA2007.10.231300
Summer Tue. Night Marathon San Francisco, USA2005.06.142170
Spring Tuesday Night Marathon (Open) San Francisco, USA2005.03.29760
Ebcc Liga (Team) Berkeley, USA2005.02.27720
Arthur Dake International San Francisco, USA1999.07.111660
    (29 more)
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