White wins material, and retains much the more active pieces. The rest is easy.

21...Nbc6 22.Bxd6 Ra5 23.Rd5 Rxb5 24.Rxb5 Nd4+ 25.Kb1 Nxb5 26.Bxe5 Kf7 27.Rc1 Ke6 28.Rc5 Nd6 29.Kc2 Rf8 30.Bd4 Rf1 31.Re5+ Kd7 32.Bc5 Kc6 33.Bxb4 Rf2+ 34.Kc1 Nb7 35.Rg5 g6 36.a3 Re2 37.Kb1 Rf2 38.Ka2 Nd8 39.Rc5+ Kb7 40.Rd5 Nc6 41.Bc3 Rxg2 42.Rd7+ Kb6 43.Rxh7 Kb5 44.Kb3 Rg4 45.Rd7 Rh4 46.Rd2 Rh3 47.Rg2 Nd4+ 48.Ka2 Nf5 49.Be5 Re3 50.Bb8 Re6 51.Rg4 Ne7 52.Bg3 Nc6 53.a4+ Kc5 54.Ka3 Rf6 55.b3 Kd5 56.Rg5+ Ke4 57.Rc5 Re6 58.a5 Kd3 59.b4 Nd4 60.Be5! Nf3 61.Bb2 Nd2 62.Rc3+ Ke2 63.Ka4
Black resigned.

Black has wasted many tempi in the opening on non-developing moves, even ‘forgetting’ to castle. The knight has already moved three times to get to c5, which is an impermissible luxury, as Black’s development is far from complete. The white pieces are all mobilised and ready for the attack.

Starting with a piece sacrifice was inaccurate: 14.Ndxb5 axb5 15.e5 b4! leads to unclear consequences.

If 14...dxe5 15.Ndxb5 Qxd2+ 16.Rxd2, little changes – the queenside pawn armada decides the game.

15...axb5 16.Bxc5 Nc6 17.Bxd6 Bxd6 18.Qxd6 Qxd6 19.Rxd6 b4 20.axb4 also leads to a winning position for White, although it prolongs the game somewhat.

White has a safe king and an attack, everything he could want.

Black resigned.

White has already mobilised almost all of his forces, whilst Black is some way behind with his development. The sacrifice on d5, followed by play on the e-file, is tempting, but before playing it, White first prepares a target on the queenside, where the black king will soon end up.

If 10...bxa4, 11.Nd5 gains further in strength.

If Black declines the knight, then after 11...Nxd5 12.exd5 e5 13.a5, the pawn on b4 is cut off from its own camp and will be lost.