MESON Chess Problem Database

Problem Display
PID: 233387 (5k2/8/4Kn2/8/7R/8/8/7Q w - - 0 1)

Benko, Pal Charles

Chess Life, 1982

5k2/8/4Kn2/8/7R/8/8/7Q

#2

3 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qa8#
  • Tries
    • 1.Kxf6?
      • threat
        • 2.Rh8#
        • 2.Qa8#
      • 1...Kg8
        • 2.Rh8#
        • 2.Qa8#
      • 1...Ke8!
    • 1.Rh8+?
      • 1...Kg7
        • 2.Qh6#
      • 1...Sg8!
    • 1.Qb7?
      • threat
        • 2.Qf7#
      • 1...Ke8
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qe7#
        • 2.Qb8#
      • 1...Kg8
        • 2.Qf7#
      • 1...Sd7!
  • Keys
    • 1.Rg4!
      • 1...Ke8
        • 2.Qa8#
      • 1...Sxg4
        • 2.Qh8#
      • 1...Se4
        • 2.Qh8#
      • 1...Sd5
        • 2.Qh8#
      • 1...Sh5
        • 2.Qa8#
      • 1...Sd7
        • 2.Qh8#
      • 1...Sh7
        • 2.Qa8#
      • 1...Se8
        • 2.Qh8#
      • 1...Sg8
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR(A)
  • Tries
    • Try
      • K(C);P-FLIGHT,XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • S(a);
  • Actual
    • R(B);
    • Vars
      • K(b);P-FLIGHT::QAR(A)
      • S(a);N_GUARD,XR(B)::QAR2(A)
      • S(a);N_GUARD::QAR2(A)
      • S(a);N_GUARD::QAR(A)
      • S(a);N_GUARD,SBLOCK::QAR2(A)
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