MESON Chess Problem Database

Problem Display
PID: 27658 (6Q1/8/B7/n1p5/pkbR1K1p/8/PP6/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

6Q1/8/B7/n1p5/pkbR1K1p/8/PP6/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...cxd4
      • 2.Qf8#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qe1#
        • 2.Qb6#
      • 1...cxd4
        • 2.Qd6#
        • 2.Qe7#
      • 1...Sb3
        • 2.Qb6#
      • 1...Sc6
        • 2.Qe1#
      • 1...a3!
    • 1.Qg3?
      • threat
        • 2.Qe1#
        • 2.Qa3#
        • 2.Qc3#
        • 2.a3#
      • 1...cxd4
        • 2.Qa3#
      • 1...Sb3
        • 2.Qc3#
      • 1...Sc6
        • 2.Qe1#
        • 2.Qc3#
      • 1...Sb7
        • 2.Qe1#
        • 2.Qc3#
      • 1...a3
        • 2.Qxa3#
      • 1...hxg3!
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...cxd4
        • 2.Qe7#
        • 2.Qd6#
        • 2.Qf8#
      • 1...a3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qb5#
        • 2.Qe1#
      • 1...cxd4
        • 2.Qe7#
        • 2.Qf8#
      • 1...Sb3
        • 2.Qb5#
      • 1...Sc6
        • 2.Qe1#
      • 1...a3
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);N_SPINB(c),OGATEB,XR(C)::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAR2(F)
        • S(e);::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • P(f);N_SPINB(c),XR(C)::QAB1(F)
        • S(e);::QAB1(F)
        • P(a);::QAB1(F),XP(a)
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • S(e);::QAR1(F)
      • S(e);::QAB(F)
      • P(a);::QAR1(F)
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