MESON Chess Problem Database

Problem Display
PID: 11348 (K2n4/1n3p2/5Qp1/1p1kP1R1/1P1p4/3P4/8/8 w - - 0 1)

Leppington, WG

Chess, 1938

K2n4/1n3p2/5Qp1/1p1kP1R1/1P1p4/3P4/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qd6#
    • 1...Sc5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sc6
      • 2.Qxf7#
    • 1...Se6
      • 2.Qf3#
  • Tries
    • 1.Ka7?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qf3#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sc6+!
    • 1.Kb8?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qf3#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sc6+!
    • 1.Qb6?
      • 1...Sd6
        • 2.Qxd6#
      • 1...f5
        • 2.exf5 ep#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Se6
        • 2.Qxb7#
      • 1...f6
        • 2.exf6#
      • 1...Sc6!
  • Keys
    • 1.Qa6!
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc6
        • 2.Qa2#
      • 1...f5
        • 2.exf5 ep#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Se6
        • 2.Qxb7#
      • 1...f6
        • 2.exf6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAR1(E)
    • S(e);N_GUARD::QAR1(E),XS(e)
    • S(g);N_GUARD,SBLOCK::QAB(E),XP(f)
    • S(g);SBLOCK::QAB(E)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • S(e);N_GUARD::QAR1(E),XS(e)
        • S(g);SBLOCK::QAB(E)
        • S(e);N_GUARD::QAR1(E)
      • Refutation
        • S(g);CHECK
    • Try
      • K(F);P-FLIGHT
      • Vars
        • S(e);N_GUARD::QAR1(E),XS(e)
        • S(g);SBLOCK::QAB(E)
        • S(e);N_GUARD::QAR1(E)
      • Refutation
        • S(g);CHECK
    • Try
      • Q(E);
      • Vars
        • S(e);N_GUARD::QAR1(E),XS(e)
        • P(f);OGATE::R(D)+P(C),XP(f),EP
        • S(e);N_GUARD::QAR1(E)
        • S(g);N_GUARD,SBLOCK::QAB(E),XS(e)
        • P(f);OGATE::R(D)+P(C),XP(f)
      • Refutation
        • S(g);
  • Actual
    • Q(E);
    • Vars
      • S(e);N_GUARD::QAR1(E),XS(e)
      • S(g);SBLOCK::QAB(E)
      • P(f);OGATE::R(D)+P(C),XP(f),EP
      • S(e);N_GUARD::QAR1(E)
      • S(g);N_GUARD,SBLOCK::QAB(E),XS(e)
      • P(f);OGATE::R(D)+P(C),XP(f)
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