MESON Chess Problem Database

Problem Display
PID: 261969 (8/7Q/p7/k5KR/1r3R2/p7/8/8 w - - 0 1)

Hage, Poul

Problemnoter, 1962

8/7Q/p7/k5KR/1r3R2/p7/8/8

#2

4 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kg4+?
      • 1...Ka4
        • 2.Qc2#
      • 1...Rb5
        • 2.Qc7#
      • 1...Kb6!
    • 1.Kh4+?
      • 1...Ka4
        • 2.Qc2#
      • 1...Rb5
        • 2.Qc7#
      • 1...Kb6!
    • 1.Kf6+?
      • 1...Ka4
        • 2.Qc2#
      • 1...Rb5
        • 2.Qc7#
      • 1...Kb6!
    • 1.Kg6+?
      • 1...Kb6
        • 2.Rf6#
      • 1...Rb5
        • 2.Qc7#
      • 1...Ka4!
  • Keys
    • 1.Kh6+!
      • 1...Ka4
        • 2.Qc2#
      • 1...Kb6
        • 2.Rf6#
      • 1...Rb5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);CHECK,P-FLIGHT,P_SPINR(A)
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINR(b)::QAB(D)
        • R(b);N_PINR(A),P_SPINR(b)::QAB(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(B);CHECK,P_SPINR(A),S_FLIGHT
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINR(b)::QAB(D)
        • R(b);N_PINR(A),P_SPINR(b)::QAB(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINR(b)::QAB(D)
        • R(b);P_SPINR(b)::QAB(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(B);CHECK,P-FLIGHT
      • Vars
        • K(c);N_GUARD,S_CUTR(b),S_FLIGHT::R(A)
        • R(b);P_SPINR(b)::QAB(D)
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(b)
  • Actual
    • K(B);CHECK,S_FLIGHT
    • Vars
      • K(c);N_GUARD,P-FLIGHT,P_SPINR(b)::QAB(D)
      • K(c);N_GUARD,S_CUTR(b),S_FLIGHT::R(A)
      • R(b);P_SPINR(b)::QAB(D)
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