Apocalypse Attack

The Apocalypse Attack arises when White uses the 2. Nf3 move order, exchanges on d5 and plants the knight on e5 at once instead of playing 4. d4, which would transpose to the Exchange Variation. Occupying e5 is a familiar aim in Exchange structures, and here it comes early enough that Black never gets the pin ...Bg4. The natural 4...Bf5 is a known mistake. After 5. Bb5+ Bd7 (5...Nd7 loses to 6. Qf3) 6. Qh5 g6 7. Nxd7 Nxd7 8. Qxd5, White is a pawn up with the initiative, and Lichess results reflect the danger. 4...Nc6 is the most frequent reply online, followed by 4...Nf6. Against 4...Nc6, White can combine d4 with Bb5, taking the bishop pair with Nxd7 if Black plays ...Bd7, or build a Stonewall with d4, c3, Bd3 and f4. 4...e6 is a sound answer, and 4...g6 is considered the critical test because it lets Black contest e5 flexibly. Engines rate the position as balanced, and White scores only marginally better overall.