Swindle (chess)

In chess, a swindle is a ruse by which a player in a losing position tricks their opponent and thereby achieves a win or draw instead of the expected loss. It may also refer more generally to obtaining a win or draw from a clearly losing position. I. A. Horowitz and Fred Reinfeld distinguish among "traps", "pitfalls", and "swindles". In their terminology, a "trap" refers to a situation where players go wrong through their own efforts. In a "pitfall", the beneficiary of the pitfall plays an active role, creating a situation where a plausible move by the opponent will turn out badly. A "swindle" is a pitfall adopted by a player who has a clearly lost game. Horowitz and Reinfeld observe that swindles, "though ignored in virtually all chess books", "play an enormously important role in over-the-board chess, and decide the fate of countless games".

Although "swindling" in general usage is synonymous with cheating or fraud, in chess the term does not imply that the swindler has done anything unethical or unsportsmanlike. There is nonetheless a faint stigma attached to swindles, since players feel that one who has outplayed one's opponent for almost the entire game "is 'morally' entitled to victory" and a swindle is thus regarded as "rob[bing] the opponent of a well-earned victory". The best swindles can be quite artistic, however, and some are widely known.

There are ways that players can maximize their chances of pulling off a swindle, including playing actively and exploiting time pressure.^{[citation needed]} Although swindles can be effected in many different ways, themes such as stalemate, perpetual check, and surprise mating attacks are often seen.

The ability to swindle one's way out of a lost position is a useful skill for any chess player and according to Graham Burgess is "a major facet of practical chess". Frank Marshall may be the only top player who became well known as a frequent swindler. Marshall was proud of his reputation for swindles, and in 1914 wrote a book entitled Marshall's Chess "Swindles".

Frank Marshall, a gifted tactician who was one of the world's strongest players in the early 20th century, has been called "the most renowned of swindlers". To Marshall, the term 'swindle' "meant a particularly imaginative method of rescuing a difficult, if not lost, position." The phrase "Marshall swindle" was coined because Marshall "was famed for extricating himself from hopeless positions by such means".

Perhaps the most celebrated of his many "Marshall swindles" occurred in Marshall–Marco, Monte Carlo 1904. Marshall wrote of the position in the leftmost diagram, "White's position has become desperate, as the hostile b-pawn must queen." White could play 45.Rxc7+, but Black would simply respond 45...Kb8, winning. Many players would resign here, but Marshall saw an opportunity for "a last 'swindle'". He continued 45.c6! Now Black could have played 45...bxc6!, but disdained it because White could then play 46.Rxc7+ Kb8 47.Rb7+! Kxb7 48.Nc5+, winning Black's rook and temporarily stopping Black's pawn from advancing.

Black should have played this line, however, because he still wins after 48...Ka7 49.Nxa4: while there are many ways to win from the resulting position, the quickest would be to play Bd4, trapping the knight, and after 50.Kf3 Ka6 51.Ke4 Ka5 52.Kxd4 Kxa4 53.Kc3 Ka3, Black's pawn queens after all. Instead, Marco defended c7 with 45...Be5?, mistakenly thinking that this would put an end to Marshall's tricks. The game continued 46.cxb7+ Kb8 (46...Kxb7? 47.Nc5+ wins the rook) 47.Nc5! Ra2+ 48.Kh3 b2 49.Re7! Ka7 (not 49...b1=Q?? 50.Re8+ Ka7 51.Ra8+ Kb6 52.b8=Q+, winning Black's newly created queen) 50.Re8 c6 51.Ra8+ Kb6 52.Rxa2! b1=Q (rightmost diagram).

White's resources finally seem to be at an end, but now Marshall reveals his deeply hidden point: 53.b8=Q+ Bxb8 54.Rb2+! Qxb2 55.Na4+ Kb5 56.Nxb2. Marshall has caught Black's pawn after all – after it having queened – , and is now a pawn up in a position where it is Black who is fighting for a draw. Fred Reinfeld and Irving Chernev commented, "Marshall's manner of extricating himself from his difficulties is reminiscent of an end-game by Rinck or Troitsky!" Marshall eventually won the game after a further mistake by Black.