MESON Chess Problem Database

Problem Display
PID: 27318 (3K4/8/8/8/2Npb3/3k4/3Pn3/2R2Q2 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

3K4/8/8/8/2Npb3/3k4/3Pn3/2R2Q2

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qxf3#
    • 1...Bf5
      • 2.Qf3#
      • 2.Qxf5#
    • 1...Bg6
      • 2.Qf3#
    • 1...Bh7
      • 2.Qf3#
  • Tries
    • 1.Qh3+?
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sg3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sb2#
        • 2.Se5#
        • 2.Qc2#
      • 1...Sxc1
        • 2.Sb2#
        • 2.Se5#
      • 1...Bh1
        • 2.Qc2#
      • 1...Bg2
        • 2.Qc2#
      • 1...Bf3
        • 2.Qc2#
      • 1...Bd5
        • 2.Qc2#
      • 1...Bf5
        • 2.Qc2#
      • 1...Bc6
        • 2.Qc2#
      • 1...Bg6
        • 2.Qc2#
      • 1...Bb7
        • 2.Qc2#
      • 1...Bh7
        • 2.Qc2#
      • 1...Ba8
        • 2.Qc2#
      • 1...Sc3
        • 2.Sb2#
        • 2.Se5#
      • 1...Sg1
        • 2.Sb2#
        • 2.Se5#
      • 1...Sg3
        • 2.Sb2#
        • 2.Se5#
      • 1...Sf4
        • 2.Sb2#
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::QAR2(B),XB(d)
    • B(d);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK,N_PINS(a)
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR2(B),XB(d)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(B);N_PINS(a)
    • Threat
      • DUALS(3)
    • Vars
      • B(d);::QAB1(B)
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