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Solkolsky: Indian is now #63 while Mieses: QP jumped at place #62.
Current status: 64 openings with 250+ master games.
#65 Réti: Slav 1. Nf3 c6 is added.
#66 is Reversed Nimzo 1. Nc3 e5.
'acute' responses four ?
It's defined here:
Ah, so moves that would be annotated with a square 'ffwere "legal move" replaced with "sound move"[ i.e. maintains theoretical result of round's score]. I wonder if acute'ly forcible scenarios particularly for several turns by both sides tend to be more drawing than overtly obtuse ie nothreatening/quiescent positions
The acuteness often appears in gambits, exchanges but not necessarily. In my thread about acuteness U can see an old example, called Immortal Draw, consisting exclusively in 1-acute moves.
#67 NLA: Symmetrical 1. b3 b6 is added.
#68 van't Kruijs: Indian 1. e3 Nf6 is added.