MESON Chess Problem Database

Problem Display
PID: 27565 (8/2Q5/rpN5/Bk1P4/b6K/2R5/8/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/2Q5/rpN5/Bk1P4/b6K/2R5/8/8

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxb6#
    • 1...Ra8
      • 2.Qxb6#
  • Tries
    • 1.Sa7+?
      • 1...Rxa7
        • 2.Qxb6#
      • 1...Kxa5!
    • 1.Qf4?
      • threat
        • 2.Qf1#
        • 2.Qb4#
        • 2.Qc4#
      • 1...Rxa5
        • 2.Qf1#
        • 2.Qc4#
      • 1...Ra7
        • 2.Qf1#
        • 2.Qc4#
      • 1...Ra8
        • 2.Qf1#
        • 2.Qc4#
      • 1...Bd1
        • 2.Qb4#
        • 2.Qc4#
      • 1...Bc2
        • 2.Qb4#
        • 2.Qc4#
      • 1...Bb3
        • 2.Qb4#
      • 1...bxa5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qb4#
        • 2.Qe2#
      • 1...Rxa5
        • 2.Qe2#
      • 1...bxa5
        • 2.Qc5#
      • 1...Ra7
        • 2.Qe2#
      • 1...Ra8
        • 2.Qe2#
      • 1...Bd1
        • 2.Qb4#
      • 1...Bc2
        • 2.Qb4#
      • 1...Bb3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR1(F),XP(d)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(c);XS(E)::QAR1(F),XP(d)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d),XB(C)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAR1(F)
      • Refutation
        • P(d);XB(C)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XB(C)::QAB(F)
      • P(d);N_GUARD,XB(C)::QAR1(F)
      • R(c);::QAB(F)
      • B(a);::QAR1(F)
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