MESON Chess Problem Database

Problem Display
PID: 70383 (7b/4p1kP/3R1R1p/6pK/8/5P2/3Q4/1B6 w - - 0 1)

Musante, Horacio Luis

Bulletin Ouvrier des Echecs, 1950

7b/4p1kP/3R1R1p/6pK/8/5P2/3Q4/1B6

#2

7 + 5

81 Chess 1950

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qxh6#
  • Tries
    • 1.Rde6?
      • 1...g4
        • 2.Qxh6#
      • 1...exf6!
    • 1.Rd7?
      • 1...g4
        • 2.Qxh6#
      • 1...Kxf6!
    • 1.Rf5?
      • 1...Kxh7
        • 2.Rxg5#
      • 1...g4
        • 2.Qxh6#
      • 1...e5
        • 2.Rd7#
      • 1...e6
        • 2.Rd7#
      • 1...exd6!
    • 1.Qc3?
      • 1...exd6
        • 2.Rf4#
      • 1...exf6
        • 2.Qxf6#
      • 1...e5
        • 2.Qc7#
      • 1...e6
        • 2.Rd7#
      • 1...g4!
    • 1.Qe3?
      • threat
        • 2.Qxe7#
      • 1...exd6
        • 2.Qe7#
      • 1...exf6
        • 2.Qe7#
      • 1...e5
        • 2.Qa7#
      • 1...e6!
    • 1.Qf4?
      • threat
        • 2.Rf7#
      • 1...exf6
        • 2.Qxf6#
      • 1...gxf4!
    • 1.Qa2?
      • threat
        • 2.Rf7#
        • 2.Qf7#
        • 2.Qg8#
      • 1...exd6
        • 2.Rf7#
        • 2.Qf7#
      • 1...exf6
        • 2.Qg8#
      • 1...e6!
    • 1.Qb2?
      • 1...exd6
        • 2.Rf4#
      • 1...exf6
        • 2.Qxf6#
      • 1...e5
        • 2.Qb7#
      • 1...e6
        • 2.Rd7#
      • 1...g4!
    • 1.Qd5?
      • threat
        • 2.Rf7#
        • 2.Qf7#
        • 2.Qg8#
      • 1...exd6
        • 2.Rf7#
        • 2.Qf7#
      • 1...exf6
        • 2.Qg8#
      • 1...e6!
  • Keys
    • 1.Qd4!
      • 1...exd6
        • 2.Rf4#
      • 1...exf6
        • 2.Qxf6#
      • 1...e5
        • 2.Qa7#
      • 1...g4
        • 2.Qxg4#
      • 1...e6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAB1(B),XP(b)
  • Tries
    • Try
      • R(E);
      • Vars
        • P(a);OGATE::QAB1(B),XP(b)
      • Refutation
        • P(c);XR(F)
    • Try
      • R(E);P_PINP(c)
      • Vars
        • P(a);OGATE::QAB1(B),XP(b)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT,XR(F)
    • Try
      • R(F);
      • Vars
        • K(d);P-FLIGHT,XP(G)::B(A)+R(F),XP(a)
        • P(a);OGATE::QAB1(B),XP(b)
        • P(c);OGATEB::R(E)
      • Refutation
        • P(c);XR(E)
    • Try
      • Q(B);
      • Vars
        • P(c);N_GUARD,XR(E)::QAB(B)+R(F)
        • P(c);OGATE,P_SPINP(c),XR(F)::QAB1(B),XP(c)
        • P(c);OGATEB::QAR(B)
        • P(c);OGATEB::R(E)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XP(c)
      • Vars
        • P(c);XR(E)::QAR2(B)
        • P(c);XR(F)::QAR2(B)
        • P(c);OGATEB::QAR(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • R1(F)
      • Vars
        • P(c);OGATE,XR(F)::QAB1(B),XP(c)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);XR(F)::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(c);N_GUARD,XR(E)::QAB(B)+R(F)
        • P(c);OGATE,P_SPINP(c),XR(F)::QAB1(B),XP(c)
        • P(c);OGATEB::QAR(B)
        • P(c);OGATEB::R(E)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);XR(F)::QAR1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Vars
      • P(c);N_GUARD,XR(E)::QAB(B)+R(F)
      • P(c);OGATE,P_SPINP(c),XR(F)::QAB1(B),XP(c)
      • P(c);OGATEB::QAR(B)
      • P(a);OGATEB::QAR(B),XP(a)
      • P(c);OGATEB::R(E)
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