223 historical collections added to the Event Index

The batch includes Fridrik Olafsson’s victory at Beverwijk in 1959, early matches played at odds, national championships and international team events.

Greco’s instructional scores and John Cochrane’s recorded Calcutta games have explicit collection labels and source notes.

Collections with missing played scores show a notice explaining the gaps. Original dates and moves are preserved, with documented corrections guarded against the exact source records.