MESON Chess Problem Database

Problem Display
PID: 52209 (5b1n/5pp1/2Qp1kN1/5P2/2BP2K1/8/8/8 w - - 0 1)

Macleod, Norman Alasdair

American Chess Bulletin, 1961

5b1n/5pp1/2Qp1kN1/5P2/2BP2K1/8/8/8

#2

6 + 6

6455 The Chessboard Adventures of Norman Macleod 1996
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4?
      • 1...fxg6
        • 2.Qe6#
      • 1...Be7
        • 2.Qxe7#
      • 1...d5
        • 2.Qe5#
      • 1...Sxg6!
    • 1.Qd5?
      • 1...Sxg6
        • 2.Qxf7#
      • 1...fxg6
        • 2.Qe6#
      • 1...Be7!
    • 1.Qd7?
      • 1...Sxg6
        • 2.Qxf7#
      • 1...fxg6
        • 2.Qe6#
      • 1...Be7
        • 2.Qxe7#
      • 1...d5!
    • 1.Qc7?
      • 1...Sxg6
        • 2.Qxf7#
      • 1...d5
        • 2.Qe5#
      • 1...Be7
        • 2.Qxe7#
      • 1...fxg6!
  • Keys
    • 1.Qe8!
      • 1...Sxg6
        • 2.Qxf7#
      • 1...fxg6
        • 2.Qe6#
      • 1...d5
        • 2.Qe5#
      • 1...Be7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);N_PINP(a)
      • Vars
        • P(c);N_GUARD,XS(F)::QAR1(E)
        • B(e);N_GUARD::QAB1(E),XB(e)
        • P(a);N_GUARD::QAB1(E)
      • Refutation
        • S(f);XS(F)
    • Try
      • Q(E);N_PINP(a)
      • Vars
        • S(f);N_GUARD,XS(F)::QAR1(E),XP(c)
        • P(c);N_GUARD,XS(F)::QAR1(E)
      • Refutation
        • B(e);
    • Try
      • Q(E);N_PINP(a)
      • Vars
        • S(f);N_GUARD,XS(F)::QAR1(E),XP(c)
        • P(c);N_GUARD,XS(F)::QAR1(E)
        • B(e);N_GUARD::QAB1(E),XB(e)
      • Refutation
        • P(a);
    • Try
      • Q(E);N_PINP(a)
      • Vars
        • S(f);N_GUARD,XS(F)::QAR1(E),XP(c)
        • P(a);OGATE::QAB1(E)
        • B(e);N_GUARD::QAB1(E),XB(e)
      • Refutation
        • P(c);XS(F)
  • Actual
    • Q(E);N_PINP(a)
    • Vars
      • S(f);N_GUARD,XS(F)::QAR1(E),XP(c)
      • P(c);N_GUARD,XS(F)::QAR1(E)
      • P(a);N_GUARD::QAB1(E)
      • B(e);N_GUARD::QAB1(E),XB(e)
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