1e4e62d4d53Nc3Nf64f3?c55Be3?!...5.exd5Nxd5!6.Nxd5exd55...Nc65...cxd46.Bxd4dxe47.fxe47.Nxe4?Nxe48.fxe4Qh4+Nc6⩱would give White an isolated pawn but would lead to a different kind of position.6Nge2Be7?Allows White to take on c5, without tangible compensation for Black.6...dxe47.fxe4cxd48.Nxd4Bd7It would be good to open the position in this way, leaving White with an isolated e-pawn.7e5?...Not using the opportunity. Now we are transposing into a (bad) Steinitz (with f3 already played).7.dxc5O-O8.exd5exd59.Qd2Be610.O-O-O⩲7...Nd78f4...Now this is a Steinitz with a tempo loss for White (f3-f4).8...a69a4?!...Engine does not like this at all, perhaps it gives away the b4 square to Black.9...O-O10g4?...Weakens the diagonal leading to the king.10...f6?!10...Bh4+would be timely. I did not see why this was good:11.Bf211.Ng3cxd412.Bxd4Nxd413.Qxd4f6Whichever way White would block the check, this would deflect either the bishop or the knight from defending d4.Bxf2+12.Kxf2Qh4+13.Ng3cxd410...cxd411.Nxd4Bh4+would be good too.11Bg2?...Allows Black to open the f-file with great effect (preventing White from castling).11...fxe512fxe5?...Opens even more.12.dxe5d412...Qb6?!Open it up!12...Bh4+!13.Ng3cxd414.Bxd4Ndxe5∓At least wins a pawn.12...cxd413dxc5?!Bxc514Nxd5?...Unsound. Calculate ahead and don't see any ghosts.14.Bxc5Qxc5∓14...exd515Qxd5+Kh8Opening up the position is favorable for Black because White is not developed and White's king is stuck in the center. Black should just try to keep it so.16e6?Bxe317exd7Qb4+A bit too complicated.17...Bxd7Instead of all the complications, return the piece and be overwhelmingly winning.18.Qxd7Rad8-+18Nc3Qxb219dxc8=QQxc3+20Ke2Raxc821Qd3Nd4+21...Rf2+22.Kxe3Qc5+!because d4 is a strong square for Black.23.Ke4Re8#22Kxe3Nxc2+22...Rce8+!23.Be4Rf3#Little do I see on a real board.23Ke2Rf2+23...Nd4+24Kxf2Qxd30-1 White resigns.