MESON Chess Problem Database

Problem Display
PID: 242639 (5b2/1n2Q3/3prP2/3pN1p1/R1Nk4/B4P2/3P4/4K3 w - - 0 1)

Gockel, Hubert

Hlas l'udu, 1984

5b2/1n2Q3/3prP2/3pN1p1/R1Nk4/B4P2/3P4/4K3

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Sxe5#
    • 1...Rxf6
      • 2.Sb2#
      • 2.Se3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sxd6#
    • 1...Sa5
      • 2.Qa7#
    • 1...Sc5
      • 2.Bb2#
    • 1...Sd8
      • 2.Qa7#
    • 1...dxe5
      • 2.Sb2#
  • Tries
    • 1.Qxe6?
      • threat
        • 2.Sb2#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sxd6#
        • 2.Qg4#
      • 1...dxc4
        • 2.Rxc4#
      • 1...Sa5
        • 2.Sxa5#
        • 2.Qg4#
      • 1...Sc5
        • 2.Bb2#
      • 1...g4
        • 2.Sb2#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sxd6#
        • 2.Qxg4#
      • 1...dxe5!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qd3#
      • 1...Rxe5+
        • 2.Se3#
      • 1...dxc4
        • 2.Qe4#
      • 1...dxe5
        • 2.Sd6#
      • 1...Sc5
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(e);CHECK,XS(G)::R(E)+S(F),XR(e)
    • S(f);OGATE::QAB(I)
    • S(f);SBLOCK::B(C)
    • P(d);SBLOCK,XS(G)::R(E)+S(F)
  • Tries
    • Try
      • Q(I);N_SPINS(G),XR(e)
      • Threat
        • DUALS(6)
      • Vars
        • P(b);OGATE,P_SPINP(b),XS(F)::R1(E),XP(b)
        • S(f);SBLOCK::B(C)
      • Refutation
        • P(d);XS(G)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(e);CHECK,SBLOCK,XS(G)::R(E)+S(F)
      • P(b);N_GUARD,P_SPINP(b),XS(F)::QAR1(I)
      • P(d);SBLOCK,XS(G)::R(E)+S(F)
      • S(f);SBLOCK::B(C)
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