Arbon International Tournament 1946
Incomplete record. This archive holds 24 games of this event; the others are missing, and the number played is not established. Twenty-four pairings are represented, including nine short opening records and one ending fragment. Four published pairings have no approved score; the whole physical-play/default total is not established.
Karel Opočenský, Luděk Pachman and Daniel Yanofsky tied for first in Arbon with 5 points each. The eight-player international tournament marked the Swiss Workers Chess Federation’s 25th anniversary.
Published final standings
The contemporary Danish report gives all eight totals: Opočenský, Pachman and Yanofsky 5 each; O’Kelly 4½; Christoffel 4; Witasse 2½; Hasslauer and Martin 1 each. It does not report a title playoff. A separate Opočenský simultaneous exhibition is outside this tournament.
What survives
Four published pairings lack move scores in the approved archive: Hasslauer–Martin, O’Kelly–Martin, Witasse–Martin and Opočenský–Pachman. The last survives as a position only, with no moves. Nine other records retain only a few opening moves, while Martin–Christoffel begins at Black’s 22nd move. Every surviving move, name, result, date and round is retained.
The later full table reconstructs 28 ordinary results. The original full default and round census was not acquired, so 28 is not asserted as the physical played total. An 81-ply O’Kelly–Opočenský transcription also differs in colors and opening from the approved five-ply record; no speculative repair is made.
Dates and source limits
The original January 1947 Danish notice dates the Arbon tournament to December, and an original Polish score independently labels O’Kelly–Christoffel December 1946. The precise 7–15 December range comes from a later reconstruction. Unknown native days and months remain unknown.
The 1949 Arbon tournament is a separate event. The surviving Swiss online volumes omit their contemporary Arbon report pages; the original Danish standings, American triple-tie notice and Polish complete game were inspected directly.
Result
The archive preserves 24 pairings, including 9 short openings and 1 ending. Four other published pairings are unrepresented. The whole physical-play/default count is unknown; the complete original final standings are given below.