MESON Chess Problem Database

Problem Display
PID: 55020 (1n1RR3/1P1p1p2/1Qpk1N2/3Pn3/1N2P3/8/8/7K w - - 0 1)

Brabec, Juraj

Probleemblad, 1964

1n1RR3/1P1p1p2/1Qpk1N2/3Pn3/1N2P3/8/8/7K

#2

9 + 6

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Tries
    • 1.Sa6?
      • threat
        • 2.Qc5#
        • 2.Qc7#
      • 1...Sd3
        • 2.Qc7#
      • 1...Sxa6!
    • 1.Sxc6?
      • 1...Sexc6
        • 2.e5#
      • 1...Sbxc6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sd3
        • 2.Sxb8#
      • 1...Sf3
        • 2.Sxb8#
      • 1...Sg4
        • 2.Sxb8#
      • 1...Sg6
        • 2.Sxb8#
      • 1...Sa6
        • 2.Sxe5#
      • 1...Sc4!
  • Keys
    • 1.Sxd7!
      • 1...Sexd7
        • 2.e5#
      • 1...Sbxd7
        • 2.b8Q#
        • 2.b8B#
      • 1...Sd3
        • 2.Sxb8#
      • 1...Sf3
        • 2.Sxb8#
      • 1...Sc4
        • 2.Sxb8#
      • 1...Sg4
        • 2.Sxb8#
      • 1...Sg6
        • 2.Sxb8#
      • 1...Sa6
        • 2.Sxe5#
      • 1...f5
        • 2.Re6#
      • 1...f6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(E)
      • Refutation
        • S(f);XS(B)
    • Try
      • S(B);P_PINP(d),XP(b)
      • Vars
        • S(a);OGATE,P_SPINS(a),XS(B)::P(C)
        • S(f);OGATE,P_SPINS(f),XS(B)::P=Q
        • S(a);N_GUARD::QAR(E)+S(B),XS(f)
        • S(f);N_GUARD::QAR(E)+S(B),XS(a)
      • Refutation
        • S(a);
  • Actual
    • S(F);XP(d)
    • Vars
      • S(a);OGATE,P_SPINS(a),XS(F)::P(C)
      • S(f);OGATE,P_SPINS(f),XS(F)::P=Q
      • S(a);N_GUARD::R(H)+S(F),XS(f)
      • S(f);N_GUARD::R(H)+S(F),XS(a)
      • P(e);N_GUARD::R1(I)
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