I could not find any master games which included
4. ... e5. Of the amateur games I found, the move produced the worst '%age win' result for Black of all moves listed. (Black's best response?
4. Nf6, being prepared to retreat it back to
g8 if White pushes the e pawn. How the Hypermodernists would grin. These are all amateur games, remember... so you'll have to do your own analysis.)
I see almost 80 games that include
4. ... e5. White's wins about 70% of the time which is huge. Black's win percentage just under 21%. The only responses recorded for White are
5. Bc4 and
5. Nf3 with the former being marginally more successful.
Here are some sample games.
This one is Erich Hoffman v Walter Geissler from the 2005 EU-ch Seniors. ECO B21.
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e5 5. Bc4 Nf6 6. Qb3 d5 7. exd5 Bd6 8. Bg5 h6 9. Bh4 g5 10. Bg3 a6 11. h4 g4 12. h5 Nbd7 13. Bh4 Qc7 14. Bg3 Nb6 15. Be2 Bd7 16. Rd1 Rg8 17. Bd3 Qc5 18. Bb1 Qa5 19. Kf1 Rb8 20. Nge2 Rg5 21. Bh4 Rxh5 22. Ng3 Rxh4 23. Rxh4 Nfxd5 24. Nge4 Bf8 25. Nxd5 Bb5+ 26. Kg1 Nxd5 27. Qxd5 Be7 28. Rxh6 1-0
The first thing that strikes me is White's 9th move, a uncomfortable attack on two of Black's weakest squares,
f7. Now Black's backward
d pawn is a liability as he can't easily block the
a2-g8 diagonal. Black is forced to give the pawn back. That being said, I don't see White getting any real traction here. If Black castled on move 10 instead of playing
g5 he'd have had even chances. The path he chooses instead leads to a back-rank weakness that ends the game. Stockfish wasn't impressed with the entire adventure between Black's
g pawn and h-file Rook, or White's Bishop and
h pawn. While both players miss some chances for improving their positions, Black's shattered King-side pawns remain. The game is back and forth from moves 13 to 22; either player could have gained an advantage. However Black's
23. ... Nfxd5 is tragic and ends Black's chances to survive. After that he comes apart.
This one is Ondrej Gabris v Ladislav Kasas from SVK-chT1W 0405. ECO B21. Both are rated between FIDE(?) 2050 and 2100 so these players are similar in strength to USCF Masters. I'll post it without any Stockfish analysis as I am out of time.
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e5 5. Bc4 Nf6 6. Qb3 d5 7. exd5 Bd6 8. Bg5 h6 9. Bb5+ Nbd7 10. Bxf6 Qxf6 11. Nf3 O-O 12. Ne4 Qe7 13. O-O Nf6 14. Nxf6+ Qxf6 15. Nd2 Bf5 16. Bd3 b6 17. Rfe1 Bc5 18. Bxf5 Qxf5 19. Re2 Rad8 20. Rae1 e4 21. Nxe4 Rxd5 22. Nxc5 Rxc5 23. Qa3 Qd7 24. h3 Ra5 25. Qb3 Qd5 26. Qb4 Qc5 27. Qxc5 Rxc5 28. f4 g6 29. Kf2 Kg7 30. Rd2 Rfc8 31. Re7 R8c7 32. Rxc7 Rxc7 33. Ke3 Kf6 34. g4 Ke6 35. Ke4 f5+ 36. Kf3 Rc4 37. Re2+ Kf6 38. Rd2 Ke6 39. Re2+ Kf6 40. Rd2 1/2-1/2