The six basic tactics

Here's eight of them!

The different types of tactic are:

jumps (discovery)
mates
forks
pins/skewers
nets &
ties (undermining and overloading)

Here's one of each:

[Event "2.1 Forks"]
[Site "Italy?, "]
[Date "1801.??.??"]
[Round "?"]
[White "Greco, G."]
[Black "NN"]
[Result "1-0"]
[ECO "C41"]
[Annotator "An ancient Queen fork"]
[PlyCount "11"]

1. e4 e5 2. Nf3 d6 3. h3 Nf6 4. c3 4... Nxe4 {
# After the Knight, the piece that is best for forks is the Queen} 5. Qa4+ c6
6. Qxe4 1-0

[Event "2.2 Pins"]
[Site "corr, "]
[Date "1986.??.??"]
[Round "?"]
[White "Nudling, H."]
[Black "Gagsch, H."]
[Result "1-0"]
[ECO "C40"]
[Annotator "Another terrible pin"]
[PlyCount "13"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Be2 6... Qg6 {
# Same idea, other side} 7. Bh5 1-0

[Event "2.3 Skewers"]
[Site "Porz (5), "]
[Date "1991.??.??"]
[Round "?"]
[White "Richter"]
[Black "Bigott, M."]
[Result "1-0"]
[ECO "C45"]
[Annotator "A modest skewer"]
[PlyCount "17"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 b6 6. Bc4 Bb7 7. O-O Qf6 8.
Be3 8... Qc6 {# White's skewer is a small move to win a small piece, but it's
enough to win the game} 9. Bd5 1-0

[Event "2.4 Nets "]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "W"]
[Black "B"]
[Result "0-1"]
[ECO "C60"]
[Annotator "The Noah's Ark Trap"]
[PlyCount "22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 exd4 7. Nxd4 Nxd4 8.
Qxd4 c5 9. Qd5 Be6 10. Qc6+ Bd7 11. Qd5 {
# A net of a Bishop... This happens a lot: remember it!} 11... c4 0-1

[Event "3.1 Jumps"]
[Site "Palo Alto, "]
[Date "1989.??.??"]
[Round "?"]
[White "Wall"]
[Black "Ortiz, V."]
[Result "1-0"]
[ECO "C42"]
[Annotator "Pick your spot"]
[PlyCount "11"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 d5 5. d3 5... Ng5 {
# White can move the Knight anywhere, but which square is best?} 6. Nc6+ 1-0

[Event "3.3 Overloading"]
[Site "ProMoPro Open Prague CZE (4),"]
[Date "2004.??.??"]
[Round "?"]
[White "Cebis, P."]
[Black "Nemec, V."]
[Result "1-0"]
[ECO "C44"]
[Annotator "Overloaded"]
[PlyCount "19"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bb5 Bd7 7. O-O a6 8.
Bc4 b5 9. Bb3 9... Be7 {# Black's Bishop on d7 can block the attack on f7, but
it is already doing the job of defending c6} 10. Qd5 1-0

[Event "7 Checkmates"]
[Site "Australia ch girls (5), "]
[Date "1995.??.??"]
[Round "?"]
[White "O'Brien, G."]
[Black "LauerSmith, J."]
[Result "0-1"]
[ECO "C57"]
[Annotator "Queen and Knight "]
[PlyCount "12"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Nxe4 5. Nxf7 Qf6 6. Nxh8 {
# White liked the look of Black's Rook, but not Black's reply} 6... Qxf2# {
This is like Scholar's Mate, but the job of the Bishop is done by the Black
Knight} 0-1

[Event "3.2 Undermining"]
[Site "Ruy Lopez"]
[Date "????.??.??"]
[Round "?"]
[White "W"]
[Black "B"]
[Result "1-0"]
[ECO "C65"]
[Annotator "Removing the guard"]
[PlyCount "11"]

1. e4 e5 2. Nf3 (2. d4 exd4 3. c3 d5 4. exd5 Qxd5 5. cxd4 Nc6 6. Nf3 Bg4 7. Be2
7... Bxf3 {Black undermines the defence of d4.} 8. Bxf3 Qxd4 9. Bxc6+ {
White undermines the defence of d4 - with check!}) 2... Nc6 3. Bb5 Nf6 4. d3
4... a6 {# White doesn't usually get to carry out this idea in the Ruy Lopez:}
5. Bxc6 dxc6 6. Nxe5 1-0

Chess Quotes

"The chess-board is the world,
the pieces are the phenomena of the Universe,
the rules of the game are what we call the laws of Nature,
The player on the other side is hidden from us.
"
— Thomas HUXLEY (1825-1895).