MESON Chess Problem Database

Problem Display
PID: 27202 (K7/7B/5nb1/3PPkqR/2Q5/5P2/8/4R3 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

K7/7B/5nb1/3PPkqR/2Q5/5P2/8/4R3

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
      • 2.Qxg4#
      • 2.fxg4#
    • 1...Sxd5
      • 2.Qg4#
    • 1...Sxh5
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
      • 2.Qg4#
    • 1...Sxh7
      • 2.Qe4#
      • 2.Qg4#
    • 1...Se8
      • 2.Qe4#
      • 2.Qg4#
    • 1...Sg8
      • 2.Qe4#
      • 2.Qg4#
  • Tries
    • 1.Qd3+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kf4!
    • 1.Qc2+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kf4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Qxh5
        • 2.Qxf6#
      • 1...Sxd5
        • 2.Qg4#
      • 1...Sxh5
        • 2.Qe4#
      • 1...Sxh7
        • 2.Qe4#
        • 2.Qg4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sg4
        • 2.Qxg5#
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(C),XS(c)
    • S(c);N_GUARD,XP(D)::QAB1(C)
    • S(c);N_GUARD,N_SPINQ(b),XR(F)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(C),XS(c)
      • Refutation
        • K(a);N_SPINB(d),N_SPINQ(b),P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(C),XS(c)
      • Refutation
        • K(a);N_SPINB(d),N_SPINQ(b),P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);N_SPINQ(b),OGATE,XR(F)::QAR1(C),XS(c)
      • S(c);N_GUARD,XP(D)::QAB1(C)
      • S(c);N_GUARD,N_SPINQ(b),XR(F)::QAB1(C)
      • S(c);N_GUARD::QAB1(C),XS(c)
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Developed and maintained by Brian Stephenson.
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