30.Kh2? Too slow. The correct continuation would be:
30.Rxd7! Rxd7 31.Nxb6 Qb8 32.Qf2‚ Rd3 33.Nxc8 Qxc8=
30...Qb8–+ 31.c5 bxc5 32.bxc5 Bc6!‚ 33.Qa3 Ne5! White's king position is not good at all, and the black pieces are very activated
34.Nc3 Ng4+ [34...Nc4!–+]
35.Kg1 Rxd6 36.cxd6 Rd8 37.Rd1 Ne3 38.Rd3 Nf5 39.Qxa6 Rxd6 40.Kf2 Bb5! [△R×d3] 0–1
30.Rxd7! Rxd7 31.Nxb6 Qb8 32.Qf2‚ Rd3 33.Nxc8 Qxc8=
30...Qb8–+ 31.c5 bxc5 32.bxc5 Bc6!‚ 33.Qa3 Ne5! White's king position is not good at all, and the black pieces are very activated
34.Nc3 Ng4+ [34...Nc4!–+]
35.Kg1 Rxd6 36.cxd6 Rd8 37.Rd1 Ne3 38.Rd3 Nf5 39.Qxa6 Rxd6 40.Kf2 Bb5! [△R×d3] 0–1
10...Ba3! [A high-class move. Black sacrifices a pawn to gain a lead in development and keep the opponent's king on the center.]
[10...h5 11.Qc1 Bf5 12.Bb5 (12.Nxf5 gxf5 13.Bb5 Rg8 14.g3 (14.Bxc6+ bxc6 15.g3 Ng4 16.Nc4 f4!! 17.gxf4 Nxf2!! 18.Kxf2 Qh4+ 19.Kf1 Bb4 20.c3 Qh3+ 21.Ke1 Qg2 22.Rf1 Be7 23.Qd2 Bh4+–+) 14...Ng4 15.Nc4 f4 16.Bxc6+ bxc6 17.Bd4 Bxd4 18.exd4 e3 19.fxe3 0–0–0 20.0–0 fxe3µ) 12...Bd7!? 13.Be2 0–0–0 14.Bxf6 Qxf6 15.Ngxe4 Qe7 16.Nxc5 Qxc5 17.0–0 Bg4 18.Ne4 Qe7 19.f3 Bd7 20.Nf2²; 10...0–0 11.Bxf6 Qxf6 12.Ngxe4 Qe7 13.Nxc5 Qxc5 14.Bd3 Bf5 15.0–0 Rfd8 16.Bxf5 Qxf5 17.Qc1 Rd7 18.Nf3 Qf6 19.Rb1+/=]
11.Bxa3 Qxa3 12.Ndxe4 Nxe4 13.Nxe4 Qb4+! [Black does not allow his opponent to consolidate his position. When you have a temporary advantage like an advantage in development, you cannot waste any time and should act quickly, otherwise, your opponent can nullify it by bringing out his pieces and simplifying the game.]
14.Nd2 Bf5 15.Bd3 0–0–0! 16.a3 [16.Bxf5+? gxf5 17.c4 Rhg8! 18.a3 Qd6 19.Qc2 f4 20.Nf3 Rxg2–+; 16.Qe2 Nd4 17.exd4 (17.Qd1 Ne6 18.e4 Bxe4 19.Bxe4 Rhe8! 20.0–0 (20.f3 f5 21.Bd3 Rxd3 22.cxd3 Nf4+ 23.Kf1 Qd4 24.Nc4 Nxd3–+) 20...Rxd2µ) 17...Rhe8–+]
16...Qc3 17.0–0 Ne5! 18.e4 Be6 19.Ra2 [19.Nf3 Nxd3 20.cxd3 Rxd3-?+]
19...Nxd3 20.cxd3 Rxd3 21.Rc2 Qxb3! 22.Qc1 [22.Nxb3?? Rxd1 23.Rxd1 Bxb3–+]
22...Qxa3 23.Rxc7+ Kb8 [White resigned due to Black's connected passed pawns on the queenside.]
0–1
[10...h5 11.Qc1 Bf5 12.Bb5 (12.Nxf5 gxf5 13.Bb5 Rg8 14.g3 (14.Bxc6+ bxc6 15.g3 Ng4 16.Nc4 f4!! 17.gxf4 Nxf2!! 18.Kxf2 Qh4+ 19.Kf1 Bb4 20.c3 Qh3+ 21.Ke1 Qg2 22.Rf1 Be7 23.Qd2 Bh4+–+) 14...Ng4 15.Nc4 f4 16.Bxc6+ bxc6 17.Bd4 Bxd4 18.exd4 e3 19.fxe3 0–0–0 20.0–0 fxe3µ) 12...Bd7!? 13.Be2 0–0–0 14.Bxf6 Qxf6 15.Ngxe4 Qe7 16.Nxc5 Qxc5 17.0–0 Bg4 18.Ne4 Qe7 19.f3 Bd7 20.Nf2²; 10...0–0 11.Bxf6 Qxf6 12.Ngxe4 Qe7 13.Nxc5 Qxc5 14.Bd3 Bf5 15.0–0 Rfd8 16.Bxf5 Qxf5 17.Qc1 Rd7 18.Nf3 Qf6 19.Rb1+/=]
11.Bxa3 Qxa3 12.Ndxe4 Nxe4 13.Nxe4 Qb4+! [Black does not allow his opponent to consolidate his position. When you have a temporary advantage like an advantage in development, you cannot waste any time and should act quickly, otherwise, your opponent can nullify it by bringing out his pieces and simplifying the game.]
14.Nd2 Bf5 15.Bd3 0–0–0! 16.a3 [16.Bxf5+? gxf5 17.c4 Rhg8! 18.a3 Qd6 19.Qc2 f4 20.Nf3 Rxg2–+; 16.Qe2 Nd4 17.exd4 (17.Qd1 Ne6 18.e4 Bxe4 19.Bxe4 Rhe8! 20.0–0 (20.f3 f5 21.Bd3 Rxd3 22.cxd3 Nf4+ 23.Kf1 Qd4 24.Nc4 Nxd3–+) 20...Rxd2µ) 17...Rhe8–+]
16...Qc3 17.0–0 Ne5! 18.e4 Be6 19.Ra2 [19.Nf3 Nxd3 20.cxd3 Rxd3-?+]
19...Nxd3 20.cxd3 Rxd3 21.Rc2 Qxb3! 22.Qc1 [22.Nxb3?? Rxd1 23.Rxd1 Bxb3–+]
22...Qxa3 23.Rxc7+ Kb8 [White resigned due to Black's connected passed pawns on the queenside.]
0–1
37...h4+! [37...Qg1+ 38.Kf3 Kg7 39.e6 Qh2 40.e7 Qxh3+ 41.Ke2 Qg4+ 42.Kf1 Qd7 43.Qe4 Qe8 44.Kf2 h4 45.Qe5+ f6 46.Qe6 b5 47.a5 b4 48.Qxa6 Qxe7 49.Qc8 Qf7 50.Qxc5 Qxb3 51.Qe7+ Kh6 52.Qxf6 Qc2+ 53.Kf3 Qd1+ 54.Kf2 Qd2+=; 37...Qe1+ 38.Kf3 Qh1+ 39.Ke2 (39.Kg3? h4+ 40.Kxh4 Qg2 41.Qxf7 g5+ 42.fxg5+ Qxg5#) 39...Qg2+ 40.Kd1 Qxh3 41.Qxf7 Qxe3 42.Qf8+ Kh7 43.Qf7+=]
38.Kh2 [38.Kxh4 Qf2+ 39.Kg4 Qg2+ 40.Kh4 g5+ 41.fxg5+ Qxg5#]
38...Qf2+ 39.Kh1 Qf3+
0–1
38.Kh2 [38.Kxh4 Qf2+ 39.Kg4 Qg2+ 40.Kh4 g5+ 41.fxg5+ Qxg5#]
38...Qf2+ 39.Kh1 Qf3+
0–1
Unity Chess Strategy Multiple Choice 38
public poll
B) 13.Bf4 – 7
👍👍👍👍👍👍👍 64%
Saghana, @Sophia_Giraffe, @AryanLeekha, Mahathi, Vedant, Michael, Sanjana
A) 13.axb4 – 3
👍👍👍 27%
Vincent, Alexander, @A_Wild_Richard
C) 13.Ne5 – 1
👍 9%
Nagaprasad
👥 11 people voted so far.
public poll
B) 13.Bf4 – 7
👍👍👍👍👍👍👍 64%
Saghana, @Sophia_Giraffe, @AryanLeekha, Mahathi, Vedant, Michael, Sanjana
A) 13.axb4 – 3
👍👍👍 27%
Vincent, Alexander, @A_Wild_Richard
C) 13.Ne5 – 1
👍 9%
Nagaprasad
👥 11 people voted so far.
Unity Chess Endgame Multiple Choice 38
public poll
B) Rc2 – 16
👍👍👍👍👍👍👍 67%
@mahyarebrahimi1983, Seyed Hossein Ali, @BehroudR, Vincent, Nagaprasad, Alexander, @Sophia_Peng, @Taxialborz2008, Jaikrishnan, @Melianooo, @AryanLeekha, Vedant, Michael, @jodchess, Zhenrui, Sanjana
A) g5 – 8
👍👍👍👍 33%
@PouyaMO1360, farhad, Jayden, @Omid_kh7225, @h_a_d_I_1169, Saghana, @roshan_sethuraman, @RichardPeng
C) Rb7
▫️ 0%
👥 24 people voted so far.
public poll
B) Rc2 – 16
👍👍👍👍👍👍👍 67%
@mahyarebrahimi1983, Seyed Hossein Ali, @BehroudR, Vincent, Nagaprasad, Alexander, @Sophia_Peng, @Taxialborz2008, Jaikrishnan, @Melianooo, @AryanLeekha, Vedant, Michael, @jodchess, Zhenrui, Sanjana
A) g5 – 8
👍👍👍👍 33%
@PouyaMO1360, farhad, Jayden, @Omid_kh7225, @h_a_d_I_1169, Saghana, @roshan_sethuraman, @RichardPeng
C) Rb7
▫️ 0%
👥 24 people voted so far.