MESON Chess Problem Database

Problem Display
PID: 157468 (4K2n/5R2/7k/7P/4p1Q1/8/8/7q w - - 0 1)

Hladik, Frantisek

Source?, 1950

4K2n/5R2/7k/7P/4p1Q1/8/8/7q

#2

4 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh5
      • 2.Qg7#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sxf7
      • 2.Qg6#
  • Tries
    • 1.Rf6+?
      • 1...Sg6
        • 2.Qxg6#
      • 1...Kh7!
    • 1.Qf5?
      • threat
        • 2.Rh7#
      • 1...Sxf7
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Qxh5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Rh7#
      • 1...Kxh5
        • 2.Rh7#
      • 1...Qxh5
        • 2.Qg7#
      • 1...Sxf7
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);P_PINR(C),SBLOCK,XP(B)::QAB1(A)
    • S(d);N_GUARD::QAR1(A),XS(d)
    • S(d);N_GUARD,XR(C)::QAR1(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR1(A),XS(d)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • S(d);N_GUARD,XR(C)::QAR1(A)
        • S(d);N_GUARD::QAR1(A),XS(d)
      • Refutation
        • Q(a);P_PINR(C),XP(B)
  • Actual
    • Q(A);
    • Threat
      • R1(C)
    • Vars
      • K(c);P-FLIGHT,XP(B)::R(C)
      • Q(a);P_PINR(C),SBLOCK,XP(B)::QAB1(A)
      • S(d);N_GUARD,XR(C)::QAR1(A)
      • S(d);N_GUARD::QAR1(A),XS(d)
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