Weak king
Selection of chess games featuring opponent weak king attacks
black has a weak king and lose the game by mate
1.Nf3 c5 2.e4 e6 3.b3 b6 4.Bb2 Bb7 5.Qe2 Nf6 6.e5 Nd5 7.g3 g6 8.Na3 Ne7 9.Nc4 Nc8 10.Bg2 Bg7 11.h4 h6 12.h5 d5 13.exd6 Bxb2 14.Nxb2 Qf6 15.hxg6 Qxb2 16.gxf7+ Kd8 17.Qxe6 Qxa1+ 18.Ke2 Qg7 19.Ne5 Bxg2 20.Rxh6 Be4 21.Rh7 Bxh7 22.Qd7+ Nxd7 23.Nc6#
uncastled black attacking the castled white king
1... g5 2.Nh2 g4 3.hxg4 Rg8 4.Bxh6 Nxg4 5.Be3 Nxh2 6.Kxh2 Qh4+ 7.Kg1 Qh3 8.g3 Rh8
weak king mated by 2 pieces
1... Rxd7 2.Rxd7 Rb8 3.h3 Rb1+ 4.Kh2 Ng3
good example that shows brilliant moves by black while it's hard to sense the weakness of the white king
1... Rxd4 2.Qxd4 Rd8 3.Qe3 Rd3 4.Rhc1 Rxe3 5.Kxe3 e5 6.Bxc6 Qd8 7.Kf2 Qd2+ 8.Kg1 e4 9.Re1 Be2
kasparov sensing the hard to see weakness of the black king
1.Rxd4 cxd4 2.Re7+ Kb6 3.Qxd4+ Kxa5 4.b4+ Ka4 5.Qc3 Qxd5 6.Ra7 Bb7 7.Rxb7 Qc4 8.Qxf6 Kxa3 9.Qxa6+ Kxb4 10.c3+ Kxc3 11.Qa1+ Kd2 12.Qb2+ Kd1 13.Bf1 Rd2 14.Rd7 Rxd7 15.Bxc4 bxc4 16.Qxh8 Rd3 17.Qa8 c3 18.Qa4+ Ke1 19.f4 f5 20.Kc1 Rd2 21.Qa7