Bugayev’s attack is a kind of flank attack for white white bishop eyeing the e pawn. White may proceed on to play along the queen side. Below is the game which demonstrates the Bugayev attack.
1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Qe7 5.e3 Nf6 6.d4 e4 7.Nfd2 c6 8.c4 0-0 9.Nc3 a6 10.Be2 b5 11.cxd5 cxd5 12.g4 Be6 13.Nb3 Nbd7 14.h4 Nb6 15.g5
White is banking on the pawn storm to create an attack on the black king with just 3 pieces to create a success of pawn’s attack.
Nfd7 16.Nc5 f5 17.gxf6 Qxf6 18.Kd2 Nc4+ 19.Bxc4 bxc4 20.Rf1 Qf7 21.Qa4 Bh3 22.Nxd7 Bxd7 23.Qa5 Be6 24.Qb6 Qd7 25.Qa5 Qb7 26.Rae1 Rf3 27.Re2 Raf8 28.Rg1 Bc7 29.Qc5 R3f6 30.Qe7 R8f7 31.Qe8+ Rf8 32.Qe7 R8f7 33.Qe8+ Rf8
Critical Moment!! White denies draw and pays dearly in the next few moves
34.Qh5 Bd6 35.Rg5 g6 36.Qh6 R8f7 37.Rg2 Bf8 38.Qg5 Rf5 39.Qd8 Rd7 40.Qa5 Be7 41.h5 Bd8 42.Qa4 Rxh5 43.Qd1 Rd6 44.Na4 Qf7 45.Re1 Bh3 46.Qxh5 Bxg2 47.Qe5 Bc7 48.Qg5 Rf6 49.Nc3 Rxf2+ 50.Kc1 Bf1 51.Nxd5 Bd3 52.Ne7+ Kf8 53.Qc5 Qxe7
Black is already piece up!!
54.Qc6 Rc2+ 55.Kb1 Re2+ 56.Ka2 Rxe1 57.Qa8+ Kf7 58.Qh8 Bb1+ 59.Ka1 Bc2+ 60.Bc1 Rxc1+ 61.Kb2 Rh1 62.Kxc2 Qh4 63.d5 Qf2+ 64.Kc3 Qxe3+
And it’s all over.
Bugayev attack involves white playing purely based on the bishops present on the flanks. White should try not to close those diagonals with it’s own pawns as it leads to inactivity of it’s own pieces and hence need to maintain the pressure at the centre. White might also be able to play a stable game sometimes even without a castled king.