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| Playing hall |
King's Pawn Irregular
1.d4 d6 2.e4 Nf6 3.Nc3 Nbd7
*****
*****
*****
*****
The position is most commonly reached via the move-order 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7, which is why I am calling it an irregular system within the king's pawn complex, but that does not feel very satisfactory either.
4.f4
The main move in ChessBase's 2026 Mega database is 4.Nf3, when 4...e5 makes the opening a Philidor.
4...e5 5.Nf3 exd4 6.Qxd4
The queen cannot be sensibly challenged on this square, at least in the short run.
6...c5?!
Much more common is 6...c6, when the opening has transposed to a Pribyl, with Stockfish18 and Dragon1 giving White at least a slight edge.
7.Qd2!?
There are five more-popular destinations for the queen in Mega26, albeit in what is an obscure position, but the engines agree either the text or 7.Qd3 is best.
7...Be7!?
Seemingly a novelty, and it may be an improvement on the known moves 7...a6 and 7...Qe7.
8.e5 dxe5 9.fxe5 Ng4
This is almost certainly best, but after ...
10.Qf4
... White has a won game, according to the engines.
10...h5!?
Again this may be the best move, but in a bad position.
11.h3 g5!?
The engines suggest giving up the knight with 11...Ngxe5!?
12.Qe4!?
This seems even stronger than 12.Nxg5 Ngxe5.
12...Nh6 13.Bd3 Nf8
The engines suggest 13...Nb6 or 13...c4!?
14.Be3 g4!? 15.hxg4 Nxg4!?
The engines agree this is best.
16.Bb5+ Bd7 17.0-0-0 a6
Perhaps best is 17...Nxe3 18.Qxe3 Qb6, but 19.Bxd7+ Nxd7 20.Nd5 leaves White the equivalent of more than a rook up, according to the engines.
18.Bxd7+ Nxd7 19.e6 fxe6 20.Qg6+ Kf8 21.Qxe6
The engines point out that the quickest win starts with 21.Rhf1!?
21...Nxe3 22.Rxd7 Qxd7!?
I expected 22...Qe8, but the engines reckon that is marginally worse after 23.Ne5.
23.Qxd7 Rd8 24.Qe6 Ng4 25.Ne5 Nxe5 26.Rf1+ Ke8 27.Qxe5 Rh6
The game finished:
28.Nd5 Rd7 29.Nxe7 Rxe7 30.Qb8+ Kd7 31.Qxb7+ Kd8 32.Rf8+ 1-0

