tigran- master of exchange sacrifice Aganalian vs Petrosian, 1945  (A54) Old Indian, Ukrainian Variation, 4.Nf3, 34 moves, 0-1 #1 in soltis's 100 best games ever played Polugaevsky vs R Nezhmetdinov, 1958  (A53) Old Indian, 33 moves, 0-1 2 games