MESON Chess Problem Database

Problem Display
PID: 15584 (8/8/5KPk/6r1/6P1/3QN3/8/8 w - - 0 1)

Usmanov, Rashid R

3/5 Prize, Bron MT, 1986

8/8/5KPk/6r1/6P1/3QN3/8/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5+
      • 2.Sxf5#
    • 1...Rxg6+
      • 2.Qxg6#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qg7#
        • 2.Qh7#
      • 1...Rf5+
        • 2.Sxf5#
      • 1...Rxg4
        • 2.Qh7#
      • 1...Rxg6+!
    • 1.Qd8?
      • threat
        • 2.Qf8#
        • 2.Qh8#
      • 1...Rf5+
        • 2.Sxf5#
      • 1...Rxg4
        • 2.Qh8#
      • 1...Rxg6+!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxg5#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Rxg6+
        • 2.Qxg6#
      • 1...Rxg4
        • 2.Sxg4#
      • 1...Rh5
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,N_GUARD::S(B),XR(a)
    • R(a);CHECK,OGATE,XP(E)::QAR1(A),XR(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,N_GUARD::S(B),XR(a)
        • R(a);XP(C)::QAR1(A)
      • Refutation
        • R(a);CHECK,XP(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,N_GUARD::S(B),XR(a)
        • R(a);XP(C)::QAR2(A)
      • Refutation
        • R(a);CHECK,XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XR(a)
    • Vars
      • R(a);CHECK,XQ(A)::S(B),XR(a)
      • R(a);CHECK,OGATE,XP(E)::QAR1(A),XR(a)
      • R(a);XP(C)::S(B),XR(a)
      • R(a);OGATE::QAR1(A),XR(a)
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