The Vortex vs. SMIRF mate in 28 was a "middlegame mate" -- SMIRF played the opening well and Vortex found a tactical strike to end the game abruptly. The Vortex vs. ChessV mate, while only mating one move faster, is much more impressive, and is appears to be tactically motivated right from the opening!
Here is a link to the complete game:
Gothic Vortex 2.2.3 vs. ChessV
1.d4 g6 2.Nh3 Nh6 3.g3 Bg7 4.Nc3 Af6? 5.Bg5! Axd4 6.Ni5! Kg8 7.Nxj7!!
At first glance, Nxj7 looks to be a blunder, since both Rxj7 and Nxj7 appear perfectly playable. But after 7...Rxj7?? white has 8. e3!! which strikes at the Archbishop with the pawn and it also reveals the Queen on d1 to strike at the Rook now on j7. With 7...Nxj7 the same type of tactic awaits, since Bxi7 will entice the Rook to move, e3 will prompt the Archbishop retreat, and as before, the Queen will have Qxj7 which will now threaten the Rook which will have moved to i8 most likely.
The game continuation was even more interesting...
7...Nxj7 8.e3 Ae6 9.Bxi7 Ac4+ 10.Cd3 Nc6 11.Bd5
ChessV is suffering from the "horizon effect" described by Dr. Hans Berliner decades ago. It cannot see how to get out of the mess, so by playing Ac4+ it will "postpone" the diaster two more plies, effectively pushing the danger out of its own principal variation. Vortex searches further and sees the danger is real.
11...Axd3+ 12.cxd3 Bxc3 13.Bxj8 Bxb2 14.Rb1 Cd6 15.Qxj7 Cxd5
You need a scorecard to try and figure out who has what...
It is now white to move, and you expect 16. Rxb2 next, having white pick up the hanging Bishop. But Vortex uncorks 16. h4!! which sets up an Archbishop mate with Aj4 and Ah6 if the threats are not dealt with immediately!
16.h4!! Bh8 17.Aj4 Cf5 18.e4 Ch5
From here the threats have finally culminated to the point of execution.
The point: Black can't recapture with the pawn or else Ah6 is checkmate!
19...Bg7 20.Bh6 Bc3 21.Qj5
Vortex had announced mate in 7 with its last move.
21...f5 22.Ai5 Kf7 23.Qxh7+ Ke6 24.Qxg6+ Bf6 25.Qxf5+ Kf7 26.Ag6+ Kg8 27.Qj5#
Another tremendous game from Gothic Vortex.