MESON Chess Problem Database

Problem Display
PID: 55126 (k5K1/1R4P1/2P5/3P3R/4P3/p4r2/P5Q1/8 w - - 0 1)

Zigman, Matyaz

4th HM., Problem TT, 1971

k5K1/1R4P1/2P5/3P3R/4P3/p4r2/P5Q1/8

#2

9 + 3

56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8+
      • 2.gxf8Q#
      • 2.gxf8R#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qa6#
      • 1...Rf8+
        • 2.Qxf8#
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rd3
        • 2.Qf8#
      • 1...Rxf1!
    • 1.Qh3?
      • threat
        • 2.Qc8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf5
        • 2.Qxa3#
      • 1...Rxh3!
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rb3!
    • 1.Qd2?
      • threat
        • 2.Qa5#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rc3!
    • 1.Qe2?
      • threat
        • 2.Qa6#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rd3!
    • 1.Qf2?
      • threat
        • 2.Qa7#
      • 1...Rf8+
        • 2.Qxf8#
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Re3
        • 2.Qf8#
      • 1...Rxf2!
    • 1.Qg3?
      • threat
        • 2.Qb8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf4
        • 2.Qxa3#
      • 1...Rxg3!
    • 1.Qg4?
      • threat
        • 2.Qc8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf5!
    • 1.Qg5?
      • threat
        • 2.Qd8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf6!
    • 1.Qg6?
      • threat
        • 2.Qe8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf7!
    • 1.d6?
      • threat
        • 2.Ra5#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rf5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Re8#
      • 1...Rf8+
        • 2.gxf8Q#
        • 2.gxf8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE::PXR(b)=Q
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • R(b);OGATE::QAR(B)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
        • R(b);OGATE::QAR(B),XP(a)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(b);OGATE::QAR(B)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
        • R(b);OGATE::QAR(B),XP(a)
      • Refutation
        • R(b);P_PINP(H),XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • P(D);
      • Threat
        • R(E)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
      • Refutation
        • R(b);
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=Q
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