responses The flexible 1...Nf6 is also possible. Then if White plays 2.b3?! (2.Nf3 is safer), 2...d6! 3.Bb2?! (or 3.Nf3 e5! 4.fxe5 dxe5 5.Nxe5?? Qd4!) e5!, a sort of From's Gambit Deferred introduced by IM Michael Brooks, is dangerous for White, e.g. 4.fxe5 dxe5 5.Bxe5 Ng4! Then 6.Bb2 Bd6 "leaves White in huge trouble down the e1–h4 diagonal", and Black wins an after 7.Nf3 Bxh2! 8.Rxh2 Nxh2. After the alternative 6.Bg3, 6...Qf6! (even better than 6...Bd6) 7.c3 (not 7.Nc3? Ne3! 8.dxe3 Bb4) Bd6 is strong for Black. Another popular response is 1...g6, a sort of Modern Defense, which may transpose into a reversed Dutch Defense (if Black plays ...d5 and ...c5), or a Sicilian Defence (if White plays e4 and Black plays ...c5). Black thus prevents White from playing on the a1–h8 diagonal. Also reasonable is 1...c5, hoping for a transposition into the Tal Gambit, a favourable variation of the Sicilian Defence, after 2.e4 d5! 3.exd5 (3.Nc3, the mellifluously named "Toilet Variation," is also possible) 3...Nf6, but White need not oblige, and may build up more slowly with 2.Nf3, followed by g3, Bg2, d3, and possibly a later e4. The offbeat 1...b6!? is also known, and more soundly based than the same move after 1.e4 or 1.d4, since 1.f4 does not aid White's , and weakens the a8–h1 diagonal as the move f3 is no longer available to shore up White's . Taylor recommends 2.e4 Bb7 3.d3 e6 4.Nf3 Ne7 5.c3 d5 6.Qc2 Nd7 7.Be3, with a spatial advantage for White. Also possible is 1...b5!?, a form of the Polish Defense. After the natural 2.e4 Bb7, White has no good way to protect e4 while maintaining their attack on b5, since 3.Nc3? b4 4.Nd5 e6 wins a pawn. If Black chooses the symmetrical reply 1...f5, Taylor considers White's best line to be quiet play with 2.b3 b6 3.Bb2 Bb7 4.e3, when 4...Nf6 5.Bxf6! exf6 6.Nf3 left White with the better pawn structure in Larsen–Colon Romero, San Juan 1969. Instead, 4...e6 5.Qh5+ forces the weakening 5...g6, with a slight advantage to White according to Taylor. Also possible is the aggressive 2.e4!?, when Taylor analyses 2...fxe4 3.d3 exd3 4.Bxd3 Nf6 5.Nf3 (5.g4 is well met by 5...d5, when after 6.g5, 6...Bg4 and 6...Ne4 both favour Black) 5...d5 6.0-0, when he considers White to have some, but not enough, compensation for the sacrificed pawn. Another possible continuation is 2...fxe4 3.Nc3 Nf6 4.g4, the Swiss