411 REFERENCE · Wikibooks
Chess/Puzzles/Middlegame
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Actual matches
A. Karpov vs. E. Gyk (1968)
M. Tal vs. M Botvinnik (1960)
W. Steinitz vs. J. Rock (1863)
W. Steinitz vs. G. Thomas (1911)