MESON Chess Problem Database

Problem Display
PID: 27923 (5nQ1/6P1/5B2/2R5/5k2/2R2P2/8/4K3 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

5nQ1/6P1/5B2/2R5/5k2/2R2P2/8/4K3

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sh7
      • 2.Qb8#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Bg5#
        • 2.R3c4#
        • 2.Qc4#
      • 1...Sh7
        • 2.R3c4#
        • 2.Qc4#
        • 2.Qb8#
      • 1...Se6!
    • 1.Be5+?
      • 1...Kf5
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kg5!
    • 1.Qd5?
      • threat
        • 2.Qe5#
        • 2.Qg5#
        • 2.Qd6#
      • 1...Se6
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sg6
        • 2.Qg5#
      • 1...Sd7
        • 2.Qg5#
      • 1...Sh7
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kg3!
    • 1.Qh8?
      • threat
        • 2.Qh2#
        • 2.Qh4#
      • 1...Sg6
        • 2.Qh2#
      • 1...Sh7
        • 2.Qb8#
      • 1...Kg3!
  • Keys
    • 1.Bh4!
      • threat
        • 2.Qc4#
        • 2.Qf7#
        • 2.Qxf8#
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Se6
        • 2.Qf7#
      • 1...Sg6
        • 2.Qc4#
        • 2.Qf7#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sh7
        • 2.Qc4#
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE::QAB(G)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • S(b);
    • Try
      • B(E);CHECK
      • Vars
        • K(a);P-FLIGHT::PXS(b)=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAB(G)
        • S(b);OGATE::QAB(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(E);
    • Threat
      • DUALS(5)
    • Vars
      • S(b);::QAR(G)
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