In-between moves

Here is a miniature I played with Black against Class B player Jack Oleksyn. This game highlights the power of what FM Carsten Hansen calls “ESTs” (i.e., equal or stronger threats). White’s threats find themselves dominated by Black’s ESTs throughout.

[Event "Saturday tournament"]
[Site "Rochester, NY"]
[Date "2010.10.17"]
[Round "1"]
[White "Jack Oleksyn"]
[Black "Aaron Demby Jones"]
[Result "0-1"]
[WhiteELO "1675"]
[BlackELO "2106"]

1.d4 Nf6 2.Nf3 g6 3.Nc3
{Playing for e2-e4, which would transpose to a Pirc/Modern.}
{Holding up the center.}
( 4.Bf4 {is the Barry Attack, and probably more accurate.} )
4...Bg7 5.Qd2 $6
{This move doesn't mesh well with the bishop on g5.}
5...Ne4 $1
{Black goes for immediate equality by trying to snag the bishop pair.}
6.Qf4 $2
{A serious error. Now the White pieces trip over each other.}
( 6.Nxe4 $2 dxe4 {and the d4 pawn hangs.} )
( 6.Qe3 {was best.} )
6...h6 $6
{Winning material, but not the most accurate.}
( 6...f6 {was more precise--see the followup note.} )
7.Nxe4 $6
( 7.Bxe7 Kxe7 {and Black has been a bit discomboulated, although he
remains up a piece.}
( 7...Qxe7 $2 8.Nxd5 {is unpleasant.} )
7...dxe4 8.Ne5
{Threatening mate on f7.}
( 8...Bxe5 $2 9.Qxe5 {hitting the rook in the corner is an unpleasasnt
surprise.} )
9.Bh4 $6
{White expected g6-g5, but Black has other plans.}
9...Qxd4 $1
{Black doesn't bother picking off the useless White pieces on the
kingside, instead focusing his attack on the exposed White queenside.
Now e5 and b2 are hanging, and g6-g5 is still in the cards.}
{Probably expecting f7xg6.}
10...Qxb2 $1
{With White's queen away from the defense, his queenside is falling
apart. }
{Capitulation, but alternatives weren't much better.}
( 11.Rd1
( 11.Rc1 Bc3+ 12.Kd1 Nc6 {and a rook comes to d8 with devastating
effect.} )
( 11.Qc1 Qc3+ 12.Kd1 fxg6 {and Black has an overwhelming position
with too many threats.} )
11...Bc3+ 12.Rd2 Qc1# )
{Cashing in.}
{White tries to hide on the kingside.}
{Another in-between move! Black seals the door on any hope of White
development. Now the king and the bishop on f1 become permanently
( 13.Qxe3 Bd4 )
( 13.Kxe3 fxg6 {might have been better, but it's all rather depressing
for White.} )
{Finally there was nothing better to do than take the knight! Black is
now up a whole rook and a knight.}
{Of course White could resign, but who can resist threatening mate?}
{Staying alert. Black doesn't care about any of his pawns if he can
quickly mobilize his extra pieces.}
15.Qxb7 Nd7 16.Bxe7 Rab8
{Suddenly White's back rank looks vulnerable.}
{Threatening Qe4xe6+, winning back some material. But Black has a very
pretty counter.}
17...Qxf1+ $1
{Remeniscent of a puzzlebook checkmate!}
18.Kxf1 Rb1#
{The pawn on e3 pulls its weight after all. Black's pieces completely
overpowered their White counterparts.}

Here’s my video analysis.

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