This article uses algebraic notation to describe chess moves.

In chess, a swindle is a ruse by which a player in a losing position tricks his opponent, and thereby achieves a win or draw instead of the expected loss.^{[1][2][3][4][5]} It may also refer more generally to obtaining a win or draw from a clearly losing position.^[6] I. A. Horowitz and Fred Reinfeld distinguish among "traps", "pitfalls", and "swindles". In their terminology, a "trap" refers to a situation where a player goes wrong through his 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.^[7] 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".^[8]

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.^[9][10] 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"^[11] and a swindle is thus regarded as "rob[bing] the opponent of a well-earned victory".^[12] However, the best swindles can be quite artistic, and some are very famous.

There are ways that a player can maximize the chances of pulling off a swindle, including being objective, playing actively and exploiting time pressure. 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,^[13][14] but Frank Marshall may be the only player who has become well known as a frequent swindler.^[15] Marshall was proud of his reputation for swindles,^[16] and even wrote a book entitled Marshall's Chess "Swindles" (1914).^[17][18]

[edit] Famous swindles

Marshall-Marco: White's position looks hopeless

Position after 52...b1(Q)

Marshall's Chess "Swindles" (1914)

Frank Marshall, a gifted tactician^[19] who was one of the world's strongest players in the early 20th century, has been called "the most renowned of swindlers".^[20] Perhaps the most celebrated of his many "Marshall swindles",^[21] a term coined because Marshall "was famed for extricating himself from hopeless positions by such means",^[22] is Marshall-Marco, Monte Carlo 1904. Marshall wrote of the position diagrammed at above left, "White's position has become desperate, as the hostile [b-pawn] must queen."^[23] White could play 45.Rxc7+, but Black would simply respond 45...Kb8, winning.^[24] Many players would resign here, but Marshall saw an opportunity for "a last 'swindle.'"^[25] 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 stopping Black's pawn from advancing. Black should have played this line, however, because he still wins after 48...Ka7 49.Nxa4 Bd4! (trapping the knight) 50.Kf3 Ka6 51.Ke4 Ka5 52.Kxd4 Kxa4 53.Kc3 Ka3 and Black's pawn queens after all.^[26] Instead, Marco played 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) (see position at above right) White's resources finally seem to be at an end, but now Marshall revealed his deeply hidden point: 53.b8(Q)+! Bxb8 54.Rb2+! Qxb2 55.Na4+ Kb5 56.Nxb2. Amazingly, Marshall has caught Black's pawn after all, and is now a pawn up in a position where it is Black who is fighting for a draw.^[27] Fred Reinfeld and Irving Chernev marveled, "Marshall's manner of extricating himself from his difficulties is reminiscent of an end-game by Rinck or Troitsky!"^[28] Marshall won the game^[29] after a further mistake by Black.^[30]

Evans-Reshevsky, position after 47.h4!

Evans-Reshevsky, after 50. Rxg7+!

Perhaps an even more famous swindle is Evans-Reshevsky, U.S. Championship 1963–64,^[31] which has been dubbed the "Swindle of the Century".^[32] Evans wrote, "Black is a Knight ahead and can win as he pleases. Instead of resigning, White offered a little prayer" with 47.h4!^[33] (See position at above left.) The game continued 47...Re2+ 48.Kh1 Qxg3?? Black wins with 48...Qg6! 49.Rf8 Qe6! 50.Rh8+ Kg6, and now Black remains a piece ahead after 51.Qxe6 Nx6, or forces mate after 51.gxf4 Re1+ and 52...Qa2+.^[34][35] Evans concluded the game with 49.Qg8+! Kxg8 50.Rxg7+! (diagram at above right) .5-.5 The players agreed to a draw, since capturing the rook produces stalemate, but otherwise the rook stays on the seventh rank and checks Black's king ad infinitum.^[34] This swindle enabled Evans to finish outright second in the tournament at 7.5/11 (behind Bobby Fischer's historic 11-0 sweep), while Reshevsky was relegated to a tie for fourth-fifth place with 6.5/11.^[36]

[edit] Practical considerations

International Master (IM) Simon Webb in his book Chess for Tigers identified five "secrets of swindling":^[37]

(1) Be objective. The first prerequisite to a swindle is to be objective enough to realize early on when you have a lost position and start playing for a swindle while your position still has resources. If you wait until your position worsens and becomes hopeless, it will be too late.^[38]

(2) Do not be afraid of losing. "Once you've accepted that your position is lost, you should be in a position of psychological strength." The worst that can happen is that you'll lose the game. The pressure is on your opponent to win a "won game," and it is your opponent who will be embarrassed if unable to do so.^[39]

(3) Play actively. In a losing position, you cannot passively wait for your opponent to squeeze you to death. To stand a chance of pulling off a successful swindle, it is important to get the initiative, and this may involve sacrificing a pawn or two, or even the exchange, to activate your pieces.^[40]

Grandmaster (GM) John Nunn adds a caveat: when in a bad position, one must decide between two strategies, which he calls "grim defence" and "create confusion."^[41] "Grim defence" involves finding some way to hang on, often by liquidating to an ending. "Create confusion" entails trying to "gain the initiative, even at material cost, hoping to stir up complications and cause the opponent to go wrong."^[42] Nunn cautions that, "If you decide to go for 'create confusion' then you should press the panic button sufficiently early to give yourself a reasonable chance of success. However, you should be sure that your position is really bad enough to warrant such drastic measures. In my experience, it is far more common to panic too early than too late."^[43]

Miles-Short, position after 48...g6

Position after 61.Nf5!!

The British grandmaster Tony Miles was an accomplished swindler. (See also Bouaziz-Miles below.) He provided a stunning example of using active play to save a lost position in Miles-Short, London 1980.^[44] In the position at above left, Miles (White) is two pawns down and has no way of saving his pinned knight. Many players would resign here, but Miles played on and succeeded in perpetrating "a monstrous swindle."^[45] Miles played 49.b6!, a "last desperate fling."^[46] Hartston and Reuben write that now "49...Rxe3 or 49...Qxb6 add to Black's gains with no problems."^[47] 49...axb6?! 50.Qa4! A surprising resource; now 50...Bxe3? 51.Qa1+! Bd4 52.Rxd4 Qb4+ 53.Kc2 "leaves Black in sudden difficulties."^[48] 50...Rf8 51.Nc2 Bg7 52.Qb3 Bc6 53.Rd1 Qe5 54.a7 Ba4? 54...e3! followed by ...Be4 would still win quickly.^[49] 55.Qa3 Rc8 56.Ne3 Qa5 57.Rc1! h5 Giving his king a flight square, and avoiding 57...Qxa7 58.Bb5! Rxc1+ 59.Qxc1 threatening both 60.Qc8+ and 60.Qa3.^[50] 58.Bd5! Rxc1+? Miles writes that after 58...Rd8 "White still has plenty of problems."^[51] 59.Qxc1 Qxa7 60.Qc8+ Kh7 61.Nf5!! (See diagram at above center.) Down four pawns, White offers a piece sacrifice. White now threatens 62.Qg8#, and 61...gxf5 62.Qxf5+ Kh6 63.Qf4+ draws by perpetual check, since 63...Kg6?? 64.Be4 is mate.^[52]61...Be8! The only way to continue the game. Now 62.Qxe8? Qa1+ 63.Kc2 Qc3+ 64.Kd1 Qd3+ and 65...Qxd5 wins for Black.^[53] 62.Nxg7! Qd7 63.Qxe8 Qxd5 64.Ne6 Qb3+ 65.Kc1 Qc3+ 66.Kd1 Qf6 Black still hopes to mobilize his pawns and play for the win. However, Miles now forces a draw with another piece sacrifice. 67.Ng5+! Qxg5 Otherwise 68.Nxe4 draws easily.^[54] 68.Qf7+ Kh8 69.Qf8+ Kh7 .5-.5 White draws by perpetual check.

(4) Use the process of elimination. If you have a choice of several possible moves, and you see simple forced wins against all but one of those moves, you should play the one remaining move, and do so quickly. Again, the onus is on your opponent to find a way to win.^[55]

(5) "Star quality." Webb uses this term to refer to the prospective swindler's manner at the chessboard. He explains, "if you're on the defensive, try to look completely dejected and uninterested, in the hope that your opponent will get careless; but once you start getting your pieces into action and complicating the position, look as confident as possible in an effort to frighten him." Further, when you set a trap, try to look normal, or even to appear nervous if you're sure that you can do so without arousing your opponent's suspicions.^[56]

Such play-acting can be carried to extremes. GM Nikolai Krogius writes that Najdorf, in his game against Gligoric at the 1952 Helsinki Olympiad,^[57] "left a pawn en prise in time trouble, and then desperately clutched his head and reached out as if wanting to take the pawn back. . . . Gligoric took the pawn, and soon thereafter lost the game. It transpired that Najdorf had staged the whole pantomime to blunt his opponent's watchfulness. This can hardly be called ethical."^[58]

(6) Time trouble. This has two aspects; the more obvious is exploiting the opponent's time pressure to perpetrate a swindle. Ali Mortazavi observes that "when the clock is ticking and time is pressing, a player's intuition is most likely to let him down, and this is where the swindler will get his opportunity."^[59] He writes, "It is of the utmost importance that the swindler conducts himself in the appropriate fashion when his opponent is in time trouble."^[60] This includes calmly reflecting rather than rushing one's moves.^[61] GM Pal Benko notes that it is unpleasant for the player in time trouble to have to wait at the board, without daring even to get up to get a drink of water; this also makes the player in time trouble impatient, interferes with his concentration, and may cause him to mix up his planned responses.^[62] Mortazavi also advocates that, in general, one should avoid playing the most obvious moves (one-move traps, obvious pawn breaks, checks, etc.), since the player in time trouble will likely have analyzed and have responses ready for them.^[63]

However, both Benko and Webb advocate what Webb calls the "barrage technique": analyze a forced sequence of moves, then play them quickly.^[64][65] Webb explains, "For example, if you have an obvious exchange of pieces available, don't play it immediately, but first decide on your next move, and then play them both at once. . . . The aim is to catch your opponent with a move he hasn't considered. He will probably have considered most sensible moves in the position on the board, but since he doesn't know what your first move is going to be, he can't prepare replies to your second or third moves. The effect of an unexpected second move bashed out instantaneously can be shattering, even if it isn't particularly good."^[65] (Both Benko and Webb emphasize that a player who has a winning position should not play quickly in his opponent's time pressure.^[64][66] Likewise, GM Luděk Pachman remarks, "It is best to continue with one's sound strategic plan, and if one has the better position, it is completely illogical to fish in the murky waters of the opponent's time trouble."^[67])

The second aspect of time trouble is that the player in time trouble may use it to facilitate a swindle. An example of this is Chigorin-Schlechter, cited below, where Schlechter's time trouble led Chigorin to believe that 44...Qc7+! was a time pressure-induced blunder rather than a trap. Mortazavi notes that although players in time trouble "rarely play the best moves, their opponents can also suffer from the excitement of the moment and play abysmally."^[68] Krogius notes that a player who is unhappy with the course of the game sometimes "enters time trouble with the idea of exploiting it as a form of psychological warfare. This . . . is often successful: the opponent, hoping to gain a quick victory during the other side's time trouble, becomes excited and loses the necessary critical approach. . . . The result is a loss of detachment in controlling one's emotions which leads to serious errors, and thus the intentional use of time trouble is often justified.^[69] However, Krogius warns that one should deliberately get into time trouble only after a detailed assessment of a number of considerations, such as the complexity of the position, the opponent's character, and the likelihood of errors on his part.^[70]

Pachman-Doda, position after 27...Ne5!

Position after 30.Nf5!

Pachman once deliberately let an hour run off his clock in order to use his own time trouble to lure his opponent into a swindle. In Pachman-Doda, Havana 1965, Pachman had earlier sacrificed an exchange for attacking chances. In the position at above left, Pachman had just just played 27.Re1-e3?, to which his opponent responded with 27...Nd7-e5!. After that move, Pachman writes, "I was suddenly aware that my position was in ruins."^[71] Black threatens to win a second exchange with 28...Ng4; since 28.fxe5 fxe5, threatening both 29...Rxf2 and 29...exd4, is hopeless for White, White must allow the knight to penetrate to d3, where it will threaten White's b and f pawns, leaving Black with a crushing position.^[72] Pachman considered resigning immediately, but saw an opportunity for a possible swindle. Since Black could easily sidestep the swindle, leaving him with a winning position, it was essential for Black to think that the move introducing the swindle was a time-trouble induced blunder.^[73] Pachman, who had over an hour for the next 13 moves, accordingly let his time go down to three minutes, "the absolute minimum required in case my opponent should err."^[74] Pachman then played 28.Qd2, Doda responded 28...Nd3, and Pachman immediately played 29.Nd1 "in my artificially created time trouble!"^[75] Doda now could have kept a winning position with (for example) 29...Bg4.^[76] Instead, he glanced at Pachman's clock, thought no more than 30 seconds, and played 29...Nxf4?, falling into Pachman's swindle.^[77] Pachman played 30.Nf5!, initiating a strong attack (see diagram at above right).^[78] Pachman writes, "The rest of the game followed at lightning speed, with my opponent in no way short of time but clearly depressed by the piece sacrifice."^[79] The game concluded 30...gxf5 31.Rg3+ Kh8 32.Qxf4 Rb3? (better was 32...Qxe4 33.Qd2 f4 34.Rf3 and 35.Rxf4, with a strong attack) 33.Nc3 Rxb2 34.exf5 a5 35.Ne4 Re2 36.Nxf6 Rxf6? (after the better 36...Re5 37.Ng4 Rxf5 38.Nh6! Rf8 39.Rg5! wins) 37.Qg5 Re1+ 38.Kh2 1-0^[80]

Burden-Christiansen: somehow Christiansen, down a queen for a knight and pawn, went on to win this game!

Similarly, if you have a lost position and can manage to induce your opponent to play quickly, you maximize the chances of a swindle. As Benko explains, "if you have a lost position, you may as well try speed chess—you can only lose a game once. Maybe your opponent will get rattled and blow his advantage."^[64] GM Larry Christiansen successfully used this strategy in Burden-Christiansen, Las Vegas 1992 (diagram at left).^[81] Down a queen for a knight and pawn against an opponent rated about 2200^[82] (master-level), he managed to outplay his opponent and win! National Master Todd Barwick explains, "Christiansen hung his queen (!) in the early middle game and had a hopelessly lost position. He then moved quickly, hoping to get Jim [Burden] caught up in a faster paced game where the probability of Jim making a mistake was increased. The idea worked as the game actually speeded up to a blitz pace where Jim ended up blundering away a game he would have never lost had he taken his time."^[83]

The game continued: 26...Ng4 27.Kb1 Nh6 28.Bc4 Ng4 29.Qd3 Rd8 30.d7 e4 31.Qd6 Be5 32.Qe7 32.Qxb6! Rxd7 (or 32...Bf6 33.h3) 33.Qe6! Rd8 34.h3 wins a piece. Bf6 33.Qe8+ Kg7 34.Qf7+ Kh6 35.h3 Ne3 36.Qxf6 36.Be6! Rxd7 37.Qe6 37.Rf4! (threatening Rh4#) Nxg2 38.Rxf5 intending Qf8+ is crushing) Rd4 38.Re1 Nxg2 Christiansen evidently felt that this gave better swindling chances than 38...Nxc4 39.c3 Nd2+ 40.Kc2 Rd8 (or 40...Nb3 41.Rd1!) 41.Qxb6. 39.Rg1 Nf4 40.Qg8 e3 41.Qf8+ Kh5 42.h4 42.Qg7! h6 43.Be2+! mates quickly. Rxc4 43.Qf6 White mates with 43.Rg5+! Kxh4 44.Qh6+ Nh5 45.Rg1! Rg4 46.Rh1+ Kg3 47.Qxe3+ Kg2 48.Rg1+ Kh2 49.Qf2+ Kh3 50.Rh1#. 43.Qf7! or 43.Qg8! is also crushing, threatening both Qxh7# and Black's rook. Kh6 44.Qg5+ 44.Qf8+ allows White to transpose to the above lines, but even better is 44.Rg5! (threatening Qf8#) Ne6 (44...Nh5 allows 45.Rxg6+! hxg6 46.Qh8# or 45.Rxh5+! Kxh5 46.Qg5#). 45.Rxg6+! Kh5 46.Rg5+! Kxh4 47.Qh6#. Kg7 45.Qe7+ 45.Rd1! (threatening Rd7+) Rd4 46.Rxd4 cxd4 47.Qxf4 wins easily. Kh6 46.Qxe3? 46.Qg5+! Kg7 47.Rd1! transposes to the above line. Re4 47.Qf2 Nh3 48.Qd2+ Kh5 49.Re1 Rxe1+ 50.Qxe1 f4 51.Qe7 h6 52.Qf6? 52.Qf7! Kxh4 53.Qxg6 h5 54.Kc1 f3 55.Kd2 and now (a) 55...f2 56.Qg2 zugzwang; (b) 55...Nf4 56.Qf5! and if 56...Kg3 57.Qg5+ wins the knight; (c) 55...Ng5 56.Qf5 wins. g5 53.hxg5 hxg5 54.Qxb6 f3 55.Qxc5 Kg4 56.Qe3 Kg3 57.c4 Kg2 58.c5 f2 59.Qe4+ Kh2 60.Qf3 g4! 61.Qe2? White could draw with 61.Qxg4 f1(Q)+ 62.Kc2 Qf2+ 63.Kb1 Qf1+ 64.Kc2 Qb5 (64...Nf2 65.Qf4+ Kg2 66.Qg5+ Kf3 67.Qf6+ Ke3 68.Qh6+ Kd4 69.Qd6+ Ke4 70.Qg6+ Kd5 71.Qd6+ Ke4 72.Qg6+ Kf4 73.Qd6+ Ke4 draws by repetition of moves) 65.Qb4. g3 62.c6 g2 63.Qe5+ Kh1 64.c7 g1(Q)+ 65.Kc2 f1(Q) 66.Kc3 Qc1+ 67.Kb4 Qb6+ 68.Kxa4 Qcc6+ 0-1^[84]

[edit] Recurrent themes

Swindles can occur in myriad different ways, but as illustrated below certain themes are often seen.

[edit] Stalemate

One classic way of saving a draw in a losing position is by stalemate. Almost every master has at some point spoiled a won game by falling into a stalemate trap.^[85] The defender often achieves the stalemate by sacrificing all of her remaining mobile pieces, with check, in such a way that they must be captured, leaving the defender with only a king (and sometimes also pawns and/or pieces) with no legal moves.

Marshall-MacClure: another classic Marshall swindle

Chigorin-Schlechter: stalemate and zugzwang save the day.

Another famous Marshall swindle is Marshall-MacClure, New York 1923 (diagram at above left).^[86] Marshall, a rook down, played 1.Rh6! Rxh6 2.h8(Q)+! Rxh8 3.b5! A very unusual position has arisen: now Black is up two rooks and on move, but the only way to avoid stalemate is 3...Rd7 4.cxd7 (threatening 5.d8(Q)+, forcing stalemate) c5?? 5.bxc6 Kb8 6.Kxb6, when White even wins. Decades later, someone pointed out an alternative draw with 1.Rg6! fxg6 2.h8(Q)+ Rxh8 3.b5 or 1...Re8 2.Rg8 Rb8 3.b5.^[87]

In Chigorin-Schlechter, Ostend 1905,^[88] (diagram at above right), a game between two of the leading players of the day, an unusual combination of stalemate and zugzwang enabled the great Schlechter to rescue a desperate position. Schlechter, in extreme time trouble, played 44...Qc7+! Chigorin, thinking Schlechter had blundered, responded 45.Qb6+?, seemingly forcing the trade of queens. Schlechter's 45...Ka8!! forced an immediate draw: 46.Qxc7 is stalemate, and 46.Ka6 Qc8+! 47.Ka5 allows a draw with either 47...Qc7! (zugzwang), when White cannot make progress, or 47...Qc3+! 48.Ka6 Qc8+! with a perpetual check.

Kasparov-McDonald: the world champion falls into a stalemate trap

Position after 56.Qxe5: stalemate!

In Kasparov-McDonald, simultaneous exhibition, Great Britain 1986,^[89] (diagram at above left), the world champion had a winning advantage, which he could have converted with 54.Qd6+ Kg7 55.c6!^[90] Instead, he played 54.Bxe4??, allowing 54...Rxg3+! 55.Kxg3 Qe5+! 1/2-1/2, since the forced 56.Qxe5 gives stalemate (diagram at above right). Note that 55.Kh4!? (instead of 55.Kxg3), with the strong threat of 56.Qh7#, would have been met by 55...Rg4+! 56.Kxg4 (forced) Qd7+! 57.Qxd7 with a different stalemate.

Grischuk-J. Polgar, position after 60.Ne5+

Grischuk-J. Polgar, position after 61...Ng4!

Grischuk-Judit Polgar, Biel 2007,^[91][92][93] is a more complicated example of a successful endgame swindle based on a stalemate defense. In the diagram at above left, Polgar is two pawns down with a lost position. On the natural 60...Kf5, blocking White's more forward pawn, White can play 61.Kf3 followed by slowly advancing his pawns. Instead, Polgar played 60...Kh3! hoping to induce the attractive-looking 61.Kf3, when White is ready to play g4 and roll his pawns forward with Black's king out of play at h3. Grischuk fell into Polgar's trap, playing 61.Kf3? 61.f5! wins.^[94][95] Polgar responded 61...Ng4! (diagram at above right). Now 62.Nxg4 would give stalemate. Worse, White is in zugzwang, having no useful moves, e.g. 62.f5 Nxe5+; 62.Ke2 Kxg3; or 62.Ke4 Nf6+! 63.Kf5 Kxg3 64.Kxf6 Kxf4 with a draw by material insufficiency. The game continued 62.Nd3 Nh2+ 63.Ke4 Ng4 Since White has no way to save the g-pawn other than repeating the position with 64.Kf3 Nh2+, Black keeps her knight actively placed rather than immediately capturing the pawn. 64.Ne5 Nf6+! 65.Kf3 Ng4! Repeating the position that occurred after 61...Ng4! This time White tried 66. Nc4, but also without success: 66...Nh2+ 67.Ke4 Nf1 68.Ne3 Nxg3+ 69.Ke5 Kh2 70.Kd6 Nh5 71.f5 Ng7 72.f6 1/2-1/2 72...Ne8+ followed by 73...Nxf6 leaves White unable to mate with his lone knight.

For further examples of swindles based on stalemate, see Stalemate#More complicated examples; Desperado (chess)#Examples of the second definition; Congdon-Delmar, New York 1880;^[96] Post-Nimzowitsch, Barmen Masters 1905;^[97] Schlechter-Wolf, Nuremberg 1906;^[98] Walter-Nagy, Gyor 1924;^[99] Janowski-Grünfeld, Marienbad 1925;^[100] Bernstein-Smyslov, Groningen 1946;^[101] Horowitz-Pavey, U.S. Championship 1951;^[102] Fichtl-F. Blatny, Czechoslovakia 1956;^[103] Portisch-Lengyel, Málaga 1964;^[104] Matulović-Suttles, Palma de Mallorca Interzonal 1970;^[105] Fuller-Basin, Michigan Open 1992;^[106] Boyd-Glimbrant, Alicante 1992;^[107] and Pein-de Firmian, Bermuda 1995.^[108]

[edit] Weak back rank

St. Amant-Staunton: White's position is desperate

St. Amant-Staunton: position after 32.b5!!

Grandmaster Andrew Soltis considers St. Amant's swindle in St. Amant-Staunton, 9th match game, 1843 the greatest ever perpetrated in match history.^[109] In the position diagrammed at far left, White appears to be losing a piece. His queen is under attack, and if 32.Qe4 (to save his bishop on d3), Black plays 32...Ng5 33.Qg2 (for example) Rxd3 and wins. St. Amant produced 32.b5!!, which Staunton called, "A desperate but masterly resource."^[110] G.H. Diggle referred to it, equally accurately, as "a move looking so irrelevant that everyone must have thought for a moment that it was merely a petulant way of resigning".^[111] Although it should not have saved the game, the move in fact has three points: (1) it attacks Black's bishop; (2) after 32...Rxd4 33.exd4 (threatening a back-rank mate and discovering an attack on Black's queen), it prevents the bishop from guarding the e8 square; and (3) after 32...Rxd4 33.exd4, it prevents the queen from defending e8 with 33...Qc6. Black nonetheless could have won with either (a) 32...Bd1! (threatening 33...Bxe2+) 33.Rxd1 Rxd4 34.exd4 Qh5 35.Be3 Qf3+ 36.Ke1 Re8 37.Kd2 Nf2 (Ossip Bernstein) or (b) 32...Rxd4 33.exd4 g5! 34.fxg6 Qh5!, when Black avoids being mated and himself threatens 35...Qf3+ and mate next move.^[111][112] Instead, Staunton played immediately 32...Qh5?. After St. Amant's 33.g4!, he should have played 33...Qh4 34.Qxa4 Rxd3. But shattered by the realization that he had thrown away a win, Staunton blundered again with 33...Rxd4?? 34.exd4! f6 35.gxh5 and Black resigned.^[112] The two winning lines for Black are sufficiently difficult that Staunton, annotating the game 16 years later in his Chess Player's Companion, gave neither of them, instead recommending a line leading to a probable draw by perpetual check.^[110]

This stunning reversal had a major impact on the match. Staunton had won seven and drawn one of the first eight games, and believed that St. Amant would have resigned the match if he had lost. Instead, St. Amant was able to continue the match for three more weeks, winning another five games, before finally succumbing.^[111]

Rhine-Nagle: Black, a pawn up with a won game, becomes careless.

White is down a queen for a rook, but his passed pawn, in conjunction with Black's weak back rank, is decisive.

Mating threats along the opponent's back rank often enable one to swindle. An example is seen in Rhine-Nagle, U.S. Masters 1997 (position at above left).^[113] Black, a pawn up with White's king in danger, decides that it is time to finish White off, forgetting that even a losing position may have defensive resources. Black continued 26...Rg5 27.Rhg1 Ra2?? A powerful-looking move, threatening mate in two, but it actually loses by force. Black could have kept a winning position with (for example) 27...Qf4+ 28.g3 Qf2+ 29.Rg2 Qf7, or 28.Kh1? Rg3 29.Qd1 Raa3 (threatening Rxh3+) 30.Qf1 Qh4 (renewing the threat) 31.Kh2 g6! (31...Ra2 32.Qf5! is weaker) and now Black is winning after 32.Ra1 Qxb4; 32.Rb2 Rgd3; or 32.Rc1? Ra2! (threatening mate on h3) 33.Kh1 Raxg2! 28.d6+ Kh8 The only reasonable move. White wins after 28...Qf7 29.dxc7! Ra8 30.Rgd1! Qxb3 31.Rd8+ Kf7 32.Rxb3 or 28...Kf8 29.Rbf1! Rxg2+ 30.Rxg2 Qxf1 31.Qxa2. 29.Qxa2!! Qxa2 30.dxc7! (diagram at above right) Turning the tables: Black, although ahead a queen for a rook, is suddenly helpless against White's passed pawn on the seventh rank. Qc2 29...Qa8 30.Rbd1 Rf5 31.Rd8+ Rf8 32.Rgd1, and 29...Qg8 30.Rgd1 Rf5 31.Rd8 Rf8 32.Rbd1, also win for White. 30.Ra1! The threat of a back-rank mate decides the game. 30.Rbc1? Rxg2+! 31.Rxg2 Qxc1 32.Ra2! Qf4+ 33.Kg2 Qg5+ would allow Black to draw by perpetual check. h6 If 30...Qxc7, 31.Ra8+ and mate next move. The game concluded: 31.Ra8+ Kh7 32.c8(Q) Qe4 33.Qg8+ Kg6 34.Rf8 1-0.^[114]

de Firmian-Shirazi: White has a decisive material advantage

Position after 30.Rg5

In de Firmian-Shirazi, U.S. Championship 1986,^[115] (diagram at above left), GM de Firmian is ahead three pawns, normally an easily winning material advantage at this level. IM Shirazi played 27...Qg6! attacking White's rook and inviting White to take another pawn. GM Robert Byrne, annotating the game in the New York Times, noted that de Firmian could have consolidated his great material advantage with 28.Rb2! Re8 29.Bd2! (29.Be3? Rxe3! 30.fxe3 Qg3! forces White to take perpetual check with 31.Qe8+ Kh7 32.Qh5+ Kg8 33.Qe8+).^[116] Instead, he took the bait with 28.Rxb5?? Rxf2 Now Black threatens 29...Rf1#, and White loses his queen after either 29.Kg1 Bh2+! or 29.Be3 Rf1+ 30.Bg1 Rxg1+! 31.Kxg1 Bh2+. White tried 29.Qa8+ Rf8 30.Rg5 (diagram at above right), but now 30...Qe4!, the "marvelous Marshall masher",^[117] ended the game, since 31.Qxe4 allows 31...Rf1#.

Zukertort-Steinitz, position after 27.Qxa8

Zukertort-Steinitz, position after 31.Qxa7

In Zukertort-Steinitz, London 1883,^[118] the future world champion, playing Black, had a difficult, possibly lost, game an exchange down, with his centralized king subject to attack by White's queen and two rooks. He played 27...Qd4+! (driving White's king to the corner) 28.Kh1 Rxf4! White cannot capture the rook because of the back-rank mate with Qd1. He could maintain a large advantage with 29.Rg1!, when 29...Qxb2 would be met by 30.Rh8 Nf6 31.Re1+ Ne4 (or 31...Re4 32.Re8!+ Nxe8 33.Rxe4+ and 34.Qxe8) 32.g3 Qc3 33.Rxe4+ Rxe4 34.Qe8+ Kf6 35.Qxe4 and wins.^[119][120] However, 28...Rf4 also seems to present White with an opportunity to win back a pawn or expose Black's king with 29.Re1+ and now (a) 29...Ne5 allows 30.Qxb7+; (b) 29...Re4 allows 30.Rxe4+ Qxe4 31.Qxa7 Qe1+ 32.Qg1; and (c) 29...Kf6? allows 30.Qh8+, forcing 30...Kf5 or 30...Kg5. Lured by this possibility, White played 29.Re1+? Re4 30.Rxe4+??^[121] 30...Qxe4 31.Qxa7 (diagram at right). However, Steinitz slammed the door shut with 31...b6! when the only way White could have stopped the back-rank mate was by giving up his rook (e.g. 32.Re3 Qxe3 33.h3), leaving him a knight down. Zukertort resigned.

[edit] Perpetual check

Ivanchuk (White) is up two pawns with a dominant position against Moiseenko.

Draw by perpetual check is another oft-seen way of swindling a draw from a lost position. The position at left is from Ivanchuk-Moiseenko, Russian Team Championship, Sochi 2005.^[122] Black is down two pawns against the world's sixth highest-rated player.^[123] Worse, Ivanchuk's pieces dominate the board. IM Malcolm Pein notes that after almost any sensible move, for example 30.Qc2, Black would be completely lost.^[124] White would then threaten 31.Rd6 pinning the knight to the queen, and neither 30...Nf6 31.Bxf6 gxf6 32.Qxh7# nor 30...Nc5 31.Ree7 is an adequate response. 30.Qc2 would also guard against a possible ...Qd1+, the significance of which becomes apparent after seeing the game continuation.

Moiseenko met Ivanchuk's 30.Rb7?? with 30...Nf8!! This not only threatens 31...Nxe6, but also enables Black to meet 31.Rxb8 with 31...Qd1+ 32.Kh2 Qh5+ 33.Kg1 Qd1+, drawing by perpetual check. The perpetual check is based on White's weak back rank combined with his slightly compromised king position (no h-pawn). Note how pieces that are well placed for attacking purposes may be misplaced for defensive purposes. White's rook on e6 was well placed when White had the initiative, but is of no use in stopping the threatened perpetual check. (Similarly, in Rhine-Nagle, Black's rook on g5 was an excellent attacking piece, but was poorly placed to defend Black's black rank or stop White's passed c-pawn.)

White tried 31.Rh6, but could not avoid the perpetual: 31...Rxb7 32.Qxb7 Qd1+ 33.Kh2 Rh5+ 34.Rxh5 34.Kg3!? (hoping for 34...Rxh6?? 35.Qxg7#) is met by 34...Rg5+! and White must repeat moves with 35.Kh2! Rh5+, since 35.Kh3?? Qh1#; 35.Kh4?? Qg4#; and 35.Kf4 Qg4# all get mated. 34...Qxh5+ 35.Kg3 Qg5+ 36.Kf3 Qf5+ 1/2-1/2 since White cannot escape the perpetual check.

Keres-Eliskases: Black, on move, forces a draw.

Sometimes perpetual check can even save the draw in a very simplified ending. In Keres-Eliskases, Noordwijk 1938,^[125] (diagram at right), Black seems to be in desperate straits: he can win either of White's pawns, but then the other will queen, leaving White with a theoretical win in the queen versus rook ending. However, the players agreed to a draw after 56...Rb6+! 57. Kc1 Rh6! Because of continuous checks and mate threats from Black's rook, White will never have time to queen either pawn. For instance, 58.Kd1 Kd3 59.Ke1 Ke3 60.Kf1 Kf3 61.Kg1 Rg6+! 62.Kh2 Rh6+! 63.Kg1 Rg6+ 64.Kf1 Rh6! 65.Ke1 Ke3 66.Kd1 Kd3 67.Kc1 Kc3 68.Kb1 and now Black even has a choice of draws: (a) 68...Rb6+ 69.Ka2 Ra6+! or (b) 68...Rh1+ 69.Ka2 Rh2+ 70.Ka3 Rh1! 71.Ka4 Kc4 72.Ka5 Kc5 73.Ka4 (forced) Kc4 etc.

[edit] Surprise mating attack

Karpov (White) is dead lost against Csom.

Position after 50.Nf5!! - the swindler strikes!

Anatoly Karpov

A surprise mating attack is another way to swindle a win or draw from a lost position. In Karpov-Csom, Bad Lauterberg 1977,^[126] (diagram at left), GM Csom has thoroughly outplayed the reigning world champion, and is a knight and pawn ahead with a completely winning position. Karpov's last move, 49.Rd1-d7, looks to be a last gasp before resigning. Csom played the solid-looking 49...Nf8??, saving the attacked knight and attacking White's rook. But after Karpov's 50.Nf5!! (diagram at right), Csom resigned. GM John Emms explains, "Black is mated in all variations; for example: 50...exf5 51.Qh2+ Kg8 52.Qg3+ and Qg7# follows; 50...Nxd7 51.Qh2+ Kg8 52.Qg3+ Kh8 53.Qg7#; 50...Nf4 51.Rh7+ Nxh7 52.Qg7#."^[127] Emms considers 50.Nf5!! one of "The Most Amazing Chess Moves of All Time,",^[128] while Tim Krabbé calls it one of the "Most Fantastic Moves Ever Played."^[129] Instead of 49...Nf8??, Csom could have won with 49...Ng5! Now 50.Nf5!? would be met by 50...exf5 51.Qh2+ Kg8 52.Qh6 Re1+ 53.Kh2 (53.Kf2 Qf3#) 53...Rh1+! 54.Kxh1 Nf4+ 55.Rd5 Nxd5 and wins. If instead 50.Nh5!? Rg8 51.Nxf6 (or 51.Rg7 Nh4) Nh4! threatening 52...Qg2# (note that White cannot force mate with 52.Rh7+, since 52...Nxh7 gives discovered check by the rook).

Korchnoi-Karpov: "a position it seemed impossible to lose"

Position after 39...Nf3+!!

Karpov perpetrated another such swindle in the 17th game of his 1978 world championship match against Viktor Korchnoi.^[130] Bent Larsen wrote in his book on the match that Korchnoi "lost a position it seemed impossible to lose."^[131] Korchnoi has had a large advantage for most of the game, which Karpov has been desperately trying to draw. From the position at above center, Yasser Seirawan recommends 34.Re7 followed by Rd1+, when Korchnoi "still could have hoped to keep Black's forces from coordinating."^[132] Instead, Korchnoi played 34.Rf4+?!, which Karpov met with the surprising 34...Ne4!, giving up his last pawn. Now Seirawan notes that after 35.Rxh7 Nd2!, Black would intend ...Rxa4 and ...Ke3 to harass White's king, and White's rook on f4 would be awkwardly placed for defense.^[133] Instead, Korchnoi played 35.Rd7+ Ke3 36.Rf3+ Ke2 37.Rxh7 Ncd2! A diabolical move, actually encouraging Korchnoi to hold onto his a-pawn. 38.Ra3?! Seirawan suggests that Korchnoi could have safely forced a drawn position with 38.Rhf7 Rxa4 39.h3 Nxf3+ 40.Rxf3.^[134] 38...Rc6! Now Seirawan recommends 39.g3! Nf3+ 40.Rxf3 (rather than 40.Kg2 Ne1+ 41.Kh1 Rb1) 40...Kxf3 41.Rf7+, again with a drawn position.^[135] Instead Korchnoi, in time trouble, played the natural 39.Ra1?? Nf3+!! 0-1 (diagram at right) A horrific end: Black mates after 40.Kh1 Nf2 or 40.gxf3 Rg6+ 41.Kh1 Nf2. This game was critical to the outcome of the match, since Karpov won by the narrowest possible margin: 6 wins to 5, with 21 draws.^[136][137]

Bouaziz-Miles, position after 40.c5. Black is dead lost.

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