Complete Repertoire against Alekhine and Scandinavian

Zahar Efimenko prepared a database for White against the Alekhine Defence (1.e4 Nf6) and Scandinavian Defence (1.e4 d5). Both are relatively rare but quite provocative openings in the sense that Black lures White into pushing his central pawns in the opening, only to attack and undermine them later. Such an approach is often dangerous in shorter time controls as Black gives up some space in the centre and then tries to launch a counter-attack while waiting for White's mistake as he is defending his central pawns. Another similarity between the two is that in both cases Black puts a piece on d5 (a knight in the Alekhine and typically the queen in the Scandinavian Defence) as early as move 2. In some cases, there are even overlaps in the type of position that arises out of the opening, such as the Scandinavian gambit (2.exd5 Nf6) which can lead to an Alekhine-Defence type of position once Black recaptures on d5 with the knight. The database, which consists of 15 chapters and 15 test positions, can naturally be divided into two parts.

What does r/chess think of the Alekhine Defense: Scandinavian Variation? A majority of lower rated players aren't sure of advancing the e4 pawn on move 2 and play nc3 instead. This often turns into a strictly superior Scandinavian without nc3 tempo and

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