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Posers and Puzzles

Posers and Puzzles

  1. Standard member jfkjmh
    nice one
    13 Aug '05 11:26
    In a chess tournament there are 5 boards.
    Players A, B, C, D and E are playing white
    while the players F, G, H, I and J have black.
    The following openings were chosen:
    1.e4 Nf6 2.e5 Nd5,
    1.d4 Nf6 2.c4 c5
    1.e4 c6 2.d4 d5
    1.d4 d5 2.c4 dc:
    1.c4 e5 2.Nc3 Nf6
    These statements are true about the games:
    1. F, having an extra pawn as well as D, plays at board #1
    2. A, who made the first move later than G, plays at board #2
    3. At board #3 white white played the same first move as A
    4. At board #4 black's first move was from a black to a white square
    5. The opponent of B gained a material edge on the 2nd move
    6. I hasn't moved any pawns within the first 2 moves.
    7. A, B, C, F and H have winning positions.

    What are the pairings at what board # and which opening was played at which board #?

    Sorry about my poor English.
  2. 13 Aug '05 12:36
    Originally posted by jfkjmh
    In a chess tournament there are 5 boards.
    Players A, B, C, D and E are playing white
    while the players F, G, H, I and J have black.
    The following openings were chosen:
    1.e4 Nf6 2.e5 Nd5,
    1.d4 Nf6 2.c4 c5
    1.e4 c6 2.d4 d5
    1.d4 d5 2.c4 dc:
    1.c4 e5 2.Nc3 Nf6
    These statements are true about the games:
    1. F, having an extra pawn as well as D, plays a ...[text shortened]... s at what board # and which opening was played at which board #?

    Sorry about my poor English.
    The first statement is a bit ambiguous. I assume it means that D also has an extra pawn (and not that they both play at board #1). How about:

    #1 played by E - F : 1.c4 e5 2.Nc3 Nf6
    #2 played by A - J : 1.d4 Nf6 2.c4 c5
    #3 played by B - G : 1.d4 d5 2.c4 dc:
    #4 played by D - H : 1.e4 c6 2.d4 d5
    #5 played by C - I : 1.e4 Nf6 2.e5 Nd5
  3. Subscriber BigDoggProblem
    The Advanced Mind
    13 Aug '05 19:54
    Originally posted by jfkjmh
    In a chess tournament there are 5 boards.
    Players A, B, C, D and E are playing white
    while the players F, G, H, I and J have black.
    The following openings were chosen:
    1.e4 Nf6 2.e5 Nd5,
    1.d4 Nf6 2.c4 c5
    1.e4 c6 2.d4 d5
    1.d4 d5 2.c4 dc:
    1.c4 e5 2.Nc3 Nf6
    These statements are true about the games:
    1. F, having an extra pawn as well as D, plays a ...[text shortened]... s at what board # and which opening was played at which board #?

    Sorry about my poor English.
    How can condition #7 be true? They're all book openings.
  4. 13 Aug '05 20:36
    Originally posted by BigDoggProblem
    How can condition #7 be true? They're all book openings.
    There is nothing in the statements saying that the 'winning' positions are after black's second move. Another statement is about two players being a pawn up, which also is not the case after all moves #2
  5. Subscriber BigDoggProblem
    The Advanced Mind
    14 Aug '05 17:43
    Originally posted by Mephisto2
    There is nothing in the statements saying that the 'winning' positions are after black's second move. Another statement is about two players being a pawn up, which also is not the case after all moves #2
    If that's true, then why include step 7 at all?
  6. 14 Aug '05 20:07
    Originally posted by BigDoggProblem
    If that's true, then why include step 7 at all?
    Well, step 7 means at least that A, B, C were not playing against F and H ....
  7. 15 Aug '05 00:10
    Originally posted by Mephisto2
    The first statement is a bit ambiguous. I assume it means that D also has an extra pawn (and not that they both play at board #1). How about:

    #1 played by E - F : 1.c4 e5 2.Nc3 Nf6
    #2 played by A - J : 1.d4 Nf6 2.c4 c5
    #3 played by B - G : 1.d4 d5 2.c4 dc:
    #4 played by D - H : 1.e4 c6 2.d4 d5
    #5 played by C - I : 1.e4 Nf6 2.e5 Nd5
    Only 70 minutes!
    How, exactly, did you do it ?
  8. 15 Aug '05 09:10
    Originally posted by propawnkiller
    Only 70 minutes!
    How, exactly, did you do it ?
    From:
    S1: F at #1, D not at #1
    S2: A at #2, G not at #2
    S4: black's first move at #4 was 1. ... c6, meaning 1.e4 c6 2.d4 d5
    S3: same opening move at boards 2 and 3, must be 1.d4 (two boards opened 1.e4 but one was at #4)
    S5: B plays at #3 (only one opening with a capture)

    leaves us already this:
    #1 ?(not D) - F ????
    #2 A - ?(not G) 1.d4 Nf6 2.c4 c5
    #3 B - ? 1.d4 d5 2.c4 dc:

    S7 is very rich. F doesn't play A, B or C (nor D see above), leaves only E:
    #1 E - F ?????

    S6 I plays the Alekhine, not at #2 or #3, not at #1 (above) hence #4 or #5
    but from S7, I plays A, B or C, hence he plays C (B and C on other boards)

    from the above, H can only play D (not A, B,C and E plays F)

    This leaves only J as opponent for A (not F or H, not G, not I wrong opening)

    And that leaves only G as opponent for B (not F or H, not I wrong opening, not J playing A)

    Gives the following status:
    #1 E - F ???? (not 1.d4)
    #2 A - J 1.d4 Nf6 2.c4 c5
    #3 B - G 1.d4 d5 2.c4 dc:
    ?? D - H ???
    ?? C - I Alekhine

    Of the two options remaining, the Alekhine was on board #5 (at #4 black played 1. ... c6)
    So, #4 is the Caro Kan, leaving the English as only option for #1. Result:

    #1 E - F 1.c4 e5 2.Nc3 Nf6
    #2 A - J 1.d4 Nf6 2.c4 c5
    #3 B - G 1.d4 d5 2.c4 dc:
    #4 D - H 1.e4 c6 2.d4 d5
    #5 C - I 1.e4 Nf6 2.e5 Nd5