Mnemonics and mental systems
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- A DAY FOR ANY DATE The effect
The Mate in One Problem
Many years ago Tartakower a famous chess-player walked into "The Gambit" a well-known chess club and restaurant in London, and bet with all present that he could show them a Mate in ONE problem—that they couldn't solve. He won. Chess problems for a mate in two, three or four are commonplace—but mate in one is unheard of. It is taken for granted that the position would be so simple that it would be obvious. However, this position, although painfully simple—will defy the brains of the greatest chessmaster— as the answer is a trick! It is well worth knowing as it makes a very good publicity stunt to perform when you meet a chess-player. The exact position is this:— The ruling is "White to move and mate in One" (diagram) (Moving up the board). (WHITE) 70 (BLACK) Black in Black White Shaded R = Rook P = Pawn K = King The answer is this. The rules of chess at the time when Tartakower made his bet stated quite clearly that "a pawn advanced to the "8th" rank could be exchanged for any other piece excepting a King". There was no mention of what colour that piece should be! Consequently, white plays his pawn on one square (P-N8 equals Black N) and calls a BLACK KNIGHT which is mate in one. For those wishing to keep a record of this position, I will give the problem in Forsythe Notation:— r7/kPR5/8/1K6/8/8/8/8. (White to move and mate in One; P-N8bn+) A DAY FOR ANY DATE The effect. The performer invites members of his audience to call out any date they like; upon hearing the date, the performer gives the exact day of the week that that date falls on and delivers his reply within seconds. Everything is achieved by a quick calculat- ing mental system. Before we deal with the technique, a few words of introduction are re- quired. First of all the system given can be used only for periods within the range of the Gregorian Calendar (i.e. from 1753) as prior to this, the Julian Calendar was in force. The only real difficulty in the system is the learning of the values to represent each month. Mnemonics are recommended to overcome this problem. It is first necessary to learn a simple code whereby each month of the year is represented by a number:— Download 368.41 Kb. Do'stlaringiz bilan baham: |
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