MESON Chess Problem Database

Problem Display
PID: 7994 (8/4p3/4p2K/5P2/5ppk/2P4P/5PP1/4Q3 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

8/4p3/4p2K/5P2/5ppk/2P4P/5PP1/4Q3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...gxh3
      • 2.f3#
    • 1...exf5
      • 2.Qxe7#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qxg4#
      • 1...gxh3
        • 2.Qh5#
      • 1...exf5
        • 2.Qxe7#
      • 1...g3
        • 2.Qg4#
        • 2.Qh5#
      • 1...f3!
    • 1.Qe4?
      • 1...gxh3
        • 2.Qxf4#
      • 1...exf5
        • 2.Qxe7#
      • 1...f3
        • 2.Qxg4#
      • 1...g3
        • 2.Qxf4#
      • 1...e5!
    • 1.g3+?
      • 1...Kxh3
        • 2.Qh1#
      • 1...fxg3!
  • Keys
    • 1.Qe5!
      • 1...gxh3
        • 2.Qxf4#
      • 1...exf5
        • 2.Qxe7#
      • 1...f3
        • 2.Qg3#
      • 1...g3
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,XP(E)::QAB(A)+P(B)
    • P(d);OGATE,XP(F)::QAB(A),XP(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • P(b);OGATE,XP(E)::QAR1(A)
        • P(d);OGATE,XP(F)::QAB(A),XP(e)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATEB,P_SPINP(a),XP(E)::QAR2(A),XP(a)
        • P(d);OGATE,XP(F)::QAB(A),XP(e)
        • P(a);OGATE,P_SPINP(b)::QAR1(A),XP(b)
        • P(b);OGATEB,P_SPINP(a)::QAR2(A),XP(a)
      • Refutation
        • P(d);
    • Try
      • P(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::QAR2(A)
      • Refutation
        • P(a);XP(C)
  • Actual
    • Q(A);
    • Vars
      • P(b);OGATEB,XP(E)::QAR2(A),XP(a)
      • P(d);OGATE,XP(F)::QAB(A),XP(e)
      • P(a);OGATE::QAB1(A)
      • P(b);OGATEB::QAR2(A),XP(a)
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