A bloodless victory in chess is a win for one of the players in which no pieces are taken.
Games of this genre tend to be short as longer games increase the possibility that a piece being taken or exchanged. The knight, with it’s ability to jump over pieces, and thereby avoid taking a piece en route to an attack, is disproportionally used in these types of games. Smothered mates are often seen.
A simple example of a bloodless victory is Fool’s Mate (1.f3 e5 2.g4 Qh4#)
Another simple example is Fischer-Panno, Palma de Mallorca Izt., 1970. The entire game went 1.c4 1-0. Panno had a dispute with the organizers and resigned here.
There are many more examples. Here is a favorite of mine.
1.e4 e5 2.f4 Nc6 3.Nf3 d6 4.Bc4 Nh6 5.O-O (Interesting to note that the exact sequence of moves also occurred in S. Retout (1808)-S. Burnet, England Open, Charlton 1973 which continued with 5…exf4 6.d4 Qf6 7.Nc3 Bg4 8.Nd5 Qd8 9.Bxf4 Ne7 10.Bxh6 gxh6 11.Nf6# 1-0. But that game had some captures, so let’s get on with this game.) 5…Be7 6.d3 O-O 7.f5 Ng4 8.Nc3 Nb4 9.a3 Nc6 10.h3 Nf6 11.g4 Na5 12.Ba2 b6 13.g5 Ne8 14.h4 Kh8 15.Nh2 f6 16.g6 h6 17.Qh5
Even rarer is the bloodless mate. Same conditions, but the game ends in checkmate.
This is a recent game played by two amateurs.
“Daveacksh” (1241)-“bandabou” (1212)
chess.com, Feb. 21 2019
1.e4 c5 2.Nf3 Nc6 3.Bc4 e6 4.c3!? Na5 5.Na3 a6 6.d4 b5 7.Be2 c4 8.O-O Bb7 9.e5 Be4 10.Ng5 Bg6 11.Bf3 Rb8 12.Ne4 Ne7? 13.Nd6mate 1-0
This type of mate, sans captures, has also occurred in Master (and near-Master) games.
Carl Hartlaub-H. H Rosenbaum
Freiburg, Germany, 1892
1.e4 e5 2.Bc4 Nc6 3.Nf3 f6 4.Nh4 g5 5.Qh5+ Ke7 6.Nf5mate 1-0
Chris W. Baker-Bernard Cafferty
British Chess Ch., Qualification Tournament
1.e4 Nf6 2.Nc3 d5 3.e5 Ne4 4.Nce2 Nc5 5.c3 Nd3mate 0-1
Juan Antonio Palmisano-Guillermo Llanos
Buenos Aires, 1995
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5 c5 7.d5 Qa5 8.a4 Na6 9.Ra3 Nb4 10.Nge2 e5 (Black has the advantage so White wants to defend. But his move, while well-intended, allows Black to increase his advantage to a -+.) 11.Bd2?? Nd3# 0-1
Emi Hasegawa-Mi Yen Fong (1885)
Istanbul, Aug. 28 2012
1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.Nc3 d6 5.e4 O-O 6.Bd3 e5 7.d5 Nbd7 8.b4 Nh5!? (8…a5 is more popular. The text move deserves to be investigated more.) 9.O-O Qe7 10.Ne2 c5 11.b5 f5! (The main point of 8…Nh5!?) 12.Rb1 f4 (Black obviously has the advantage.) 13.Kh1 g5 14.Neg1 g4 15.Nd2 Qh4 16.f3 Ng3#