- Ruy Lopez, Mortimer Trap
The Mortimer trap
The Mortimer Trap is a chess opening trap in the Ruy Lopez named after James Mortimer. The Mortimer Trap is a true trap in the sense that Black deliberately plays an inferior move hoping to trick White into making a mistake.
The trap begins with the moves:
- 1. e4 e5
- 2. Nf3 Nc6
- 3. Bb5 Nf6
Black plays the Berlin Defense to the Ruy Lopez. Although the Berlin was much more popular in the 19th century than in the 20th, it "became the height of theory when Vladimir Kramnik used it as his main defense to defeat Garry Kasparov in their 2000 World Championship match".
- 4. d3
White plays a quiet alternative to the more common 4.0-0, 4.d4, or 4.Nc3 (the last would transpose to the Four Knights Game). I.A. Horowitz and Fred Reinfeld wrote that 4.d3 is "Steinitz's move, with which he scored many spectacular successes during his long reign as World Champion."
- 4. ... Ne7
The Mortimer Defense, intending to reroute the knight to g6. This rare move loses time and thus is inferior to other moves, but it sets a trap. White has many acceptable replies, but the tempting capture of the black pawn on e5 is a mistake.
- 5. Nxe5? c6!
- 6. Nc4
White's best try, covering a5 and thus preventing 6...Qa5+, and threatening smothered mate with 7.Nd6#.
- 6. ... d6!
- 7. Ba4 b5
Black forks the white bishop and knight, winning a piece for two pawns.
Mortimer played his defense at the 1883 London tournament against Berthold Englisch, Samuel Rosenthal, and Josef Noa, losing all three games. Johannes Zukertort, the tournament winner, also played it against Englisch, the game resulting in a draw. Zukertort wrote of 4...Ne7, "Mr. Mortimer claims to be the inventor of this move. I adopted it on account of its novelty." The first edition of the treatise Chess Openings, Ancient and Modern analyzed 5.Nc3 Ng6 6.0-0 c6 7.Ba4 d6 8.Bb3 and now the authors gave either 8...Be6 or 8...Be7 as giving Black an equal game. A bit more recently, Horowitz and Reinfeld observed of 4...Ne7, "This time-wasting retreat of the Knight to an inferior square blocks the development of the King Bishop ... . Yet it is a matter of record that this pitfall had a vogue for many years".
Today, 4.d3 is rarely seen, and 4...Ne7 still less so. The latter move is not mentioned in either Modern Chess Openings (which relegates 4.d3 to a footnote, and mentions only 4...d6 in response) or the Encyclopedia of Chess Openings (which mentions only 4...d6 and 4...Bc5).
- De Firmian, Nick (2008). Modern Chess Openings (15th ed.). Random House. ISBN 978-0-8129-3682-7.
- Encyclopedia of Chess Openings. C (3rd ed.). 1997.
- Freeborough, E.; Ranken, C.E. (1889). Chess Openings, Ancient and Modern. Trübner and Co.
- Hooper, David; Whyld, Kenneth (1996). The Oxford Companion to Chess. Oxford University. ISBN 0-19-280049-3.
- Horowitz, I.A.; Reinfeld, Fred (1954). Chess Traps, Pitfalls and Swindles. Simon and Schuster. ISBN 0-671-21041-6.
- Minchin, J.I., ed (1973 (reprint)). Games Played in the London International Chess Tournament 1883. British Chess Magazine. ISBN 90084608-9.
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