MESON Chess Problem Database

Problem Display
PID: 27346 (K7/3P1Q2/4Rnb1/5kqB/6R1/8/8/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

K7/3P1Q2/4Rnb1/5kqB/6R1/8/8/8

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qxf6#
    • 1...Qd2
      • 2.Qxf6#
    • 1...Qe3
      • 2.Qxf6#
    • 1...Qf4
      • 2.Qxf6#
    • 1...Qh6
      • 2.Qxf6#
    • 1...Qxg4
      • 2.Qxf6#
  • Tries
    • 1.Rf4+?
      • 1...Qxf4
        • 2.Qxf6#
      • 1...Kxf4!
    • 1.Rxf6+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Qxf6!
  • Keys
    • 1.Rge4!
      • threat
        • 2.R6e5#
      • 1...Qf4
        • 2.Qxg6#
        • 2.Qxf6#
      • 1...Qg3
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::QAR1(E),XS(c)
    • Q(b);N_GUARD,XR(A)::QAR1(E),XS(c)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • Q(b);SBLOCK,XR(A)::QAR1(E),XS(c)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • R(C);CHECK,XS(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • Q(b);P_SPINQ(b),XR(C)
  • Actual
    • R(A);
    • Threat
      • R1(C)
    • Vars
      • Q(b);N_GUARD::QAR1(E),XS(c)
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