Caro-Kann Defense Spike Variation (1.e4 c6 2.g4 / 1.e4 c6 2.g4 d5 3.Nc3 dxe4) Chess Puzzles

The “caro-kann defense spike variation” is a Caro-Kann Defense sideline defined by a tactical/positional “spike” moment where Black’s setup creates an immediate target or tempo gain against White’s central or queenside plans. However, the exact, widely accepted move order that uniquely labels this name is not consistently documented across major databases, so I can’t responsibly give a definitive sequence without risking confusion with a sibling Caro-Kann variation.