MESON Chess Problem Database

Problem Display
PID: 249014 (3K4/8/7p/3p1R1p/7k/5r1P/5P2/5Q1R w - - 0 1)

Blikeng, Bjarne

Source?, 1978

3K4/8/7p/3p1R1p/7k/5r1P/5P2/5Q1R

#2

6 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Qxf2#
    • 1...Rxh3
      • 2.Qxh3#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe7#
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Rxh3
        • 2.Rxh5#
        • 2.Qxh5#
      • 1...Re3
        • 2.Rxh5#
        • 2.Qxh5#
      • 1...Rg3
        • 2.Rxh5#
        • 2.Qxh5#
      • 1...Rxf5!
    • 1.Qg2?
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Rxh3
        • 2.Rxh3#
        • 2.Rf4#
        • 2.Qxh3#
        • 2.Qg3#
      • 1...Rxf5
        • 2.Qg3#
      • 1...Ra3
        • 2.Rf4#
      • 1...Rb3
        • 2.Rf4#
      • 1...Rc3
        • 2.Rf4#
      • 1...Rd3
        • 2.Rf4#
      • 1...Re3
        • 2.Rf4#
      • 1...Rg3
        • 2.Qxg3#
        • 2.fxg3#
      • 1...Rf4
        • 2.Rxf4#
        • 2.Qg3#
      • 1...d4!
    • 1.Qg1?
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Rxh3
        • 2.Rf4#
        • 2.Qg3#
      • 1...Rxf5
        • 2.Qg3#
      • 1...Ra3
        • 2.Rf4#
      • 1...Rb3
        • 2.Rf4#
      • 1...Rc3
        • 2.Rf4#
      • 1...Rd3
        • 2.Rf4#
      • 1...Re3
        • 2.Rf4#
      • 1...Rg3
        • 2.Qxg3#
        • 2.fxg3#
      • 1...Rf4
        • 2.Rxf4#
        • 2.Qg3#
      • 1...d4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qe7#
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Rxh3
        • 2.f3#
      • 1...Rxf5
        • 2.f4#
      • 1...Re3
        • 2.fxe3#
      • 1...Rg3
        • 2.fxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XP(C)::QAB(A),XR(a)
    • R(a);OGATE,P_SPINR(a),XP(D)::QAR1(A),XR(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(a);OGATE,XP(C)::QAB(A),XR(a)
      • Refutation
        • R(a);XR(E)
    • Try
      • Q(A);
      • Vars
        • R(a);OGATE,XP(C)::QAB(A),XR(a)
        • R(a);N_GUARD,XR(E)::QAB1(A)
        • R(a);N_GUARD::R(E)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • R(a);OGATE,XP(C)::QAB(A),XR(a)
        • R(a);N_GUARD,XR(E)::QAB1(A)
        • R(a);N_GUARD::R(E)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
      • R(a);OGATE,P_SPINR(a),XP(D)::QAB(A)+P(C)
      • R(a);OGATE,XR(E)::QAB(A)+P(C)
      • R(a);OGATE::QAB(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
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