Notable Games
- 1976.08.25 Bisguier, Arthur Bernard vsBlocker, Calvin 0-1 French Defense: Winawer Variation, Advance Variation 74 moves US Open-77 US Open 1976. A 74-move Black win in the French over grandmaster Arthur Bisguier — a former US Champion — an early scalp for the Cleveland master.
- 1979.03.29 Blocker, Calvin vsDay, Lawrence A 1-0 English Opening: Anglo-Indian Defense, Queen's Knight Variation 45 moves Lone Pine op Louis D. Statham Masters Lone Pine 1979. An English-Opening win over Canadian international master Lawrence Day, Blocker's passed e-pawn queening (45.e7+).
- 1984 Blocker, Calvin vsZapata, Alonso 1-0 English Opening: Anglo-Indian Defense, King's Indian Formation 33 moves New York International New York International 1984. A 33-move win over Colombian grandmaster Alonso Zapata, the kingside break 27.Bxh6 crashing through.
- 1984 Blocker, Calvin vsConquest, Stuart 1-0 Semi-Slav Defense: Stoltz Variation 31 moves New York International New York International 1984. A Semi-Slav win over the teenage future grandmaster Stuart Conquest, 31.Rd7.
- 1984 De Firmian, Nick E vsBlocker, Calvin 0-1 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation 38 moves New York International New York International 1984. A Sicilian Sveshnikov win with Black over Nick De Firmian — later a three-time US Champion — Blocker queening a passed c-pawn (36…c1=Q).
- 1985 Byrne, Robert Eugene vsBlocker, Calvin 0-1 Sicilian Defense: Four Knights Variation, Cobra Variation 49 moves New York op New York 1985. A Black win over grandmaster Robert Byrne — the US Champion and long-time New York Times chess columnist — ground out in a knight-and-pawns endgame.
- 1985 Frias Pablaza, Victor J vsBlocker, Calvin 0-1 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line 23 moves New York op New York 1985. A 23-move Black miniature over international master Victor Frías in the Queen's Gambit Accepted.
- 1987 Blocker, Calvin vsLein, Anatoly 1-0 French Defense: Winawer Variation, Petrosian Variation 34 moves Ohio Chess Congress Ohio Chess Congress 1987. A French Winawer win over grandmaster Anatoly Lein, Blocker's kingside pawns (…g4–g3–g2) deciding.
- 1987 Comp Hi Tech vsBlocker, Calvin 0-1 French Defense: Winawer Variation, Advance Variation 78 moves Ohio Chess Congress Ohio Chess Congress 1987. A man-versus-machine win with Black over HiTech — Carnegie Mellon's world-class chess computer — outplayed across a 78-move endgame.
- 1987 Blocker, Calvin vsBjarnason, Saevar 1-0 French Defense: Winawer Variation, Delayed Exchange Variation 63 moves Philadelphia op Philadelphia 1987. A French Winawer win over Icelandic international master Sævar Bjarnason, converted in a long rook endgame.
- 1988.01.17 Rolletschek, Heinrich vsBlocker, Calvin 0-1 Caro-Kann Defense: Exchange Variation 41 moves Columbus Cardinal op Columbus 1988. A Black win over Austrian international master Heinrich Rolletschek, a kingside pawn avalanche (…f4, …g3, …g2) breaking through.
- 1999.04.17 Wojtkiewicz, Aleksander vsBlocker, Calvin 0-1 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line 57 moves Oberlin op Oberlin Open 1999. Blocker's most celebrated scalp — a Black King's Indian win over grandmaster Aleksander Wojtkiewicz (2570), decided in a king-and-pawn ending (57…e3).
- 1999 Blocker, Calvin vsSevillano, Enrico 1-0 Benoni Defense: Old Benoni 40 moves Ohio Chess Congress Ohio Chess Congress 1999. A Benoni win over future grandmaster Enrico Sevillano, the passed e-pawn (36.e6, 38.exf7) telling.
- 2006.05.14 Blocker, Calvin vsMargvelashvili, Giorgi 1-0 Queen's Gambit Declined: Three Knights Variation 35 moves Hollinberger Memorial Hollinberger Memorial 2006. A Queen's Gambit Declined win over future grandmaster Giorgi Margvelashvili.