MESON Chess Problem Database

Problem Display
PID: 10116 (5B2/8/3Ppp2/2ppkB2/6P1/1p2N3/1P2N3/Q3K3 w - - 0 1)

Dawson, L

King-Farlow, Charles P

Die Schwalbe, 1962

5B2/8/3Ppp2/2ppkB2/6P1/1p2N3/1P2N3/Q3K3

#2

9 + 6

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • 1...exf5
        • 2.Qxf5#
      • 1...d4
        • 2.Qe4#
      • 1...c4!
    • 1.Qd1?
      • 1...exf5
        • 2.Qxd5#
      • 1...c4
        • 2.Qd4#
      • 1...d4!
    • 1.Qa5?
      • 1...c4
        • 2.Sxc4#
      • 1...d4
        • 2.Qxc5#
      • 1...exf5!
    • 1.Qa8?
      • 1...exf5
        • 2.Qxd5#
        • 2.Qe8#
      • 1...d4
        • 2.Sc4#
        • 2.Qe4#
      • 1...c4!
  • Keys
    • 1.Qa7!
      • 1...exf5
        • 2.Qe7#
      • 1...c4
        • 2.Qd4#
      • 1...d4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(e);OGATE,XB(G)::QAR1(A),XP(e)
        • P(c);N_GUARD::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(e);N_GUARD,XB(G)::QAR1(A),XP(c)
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • P(b);P_SPINP(c)::S(E),XP(b)
        • P(c);OGATEB,P_SPINP(b)::QAR2(A),XP(b)
      • Refutation
        • P(e);XB(G)
    • Try
      • Q(A);
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • P(e);OGATEB,XB(G)::QAR2(A)
      • P(b);OGATE::QAB1(A)
      • P(c);OGATEB::QAR2(A),XP(b)
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