MESON Chess Problem Database

Problem Display
PID: 27784 (K7/8/5R2/Q7/8/B2N4/3np3/N2k4 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

K7/8/5R2/Q7/8/B2N4/3np3/N2k4

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sf2#
      • 2.Qe1#
    • 1...Sf1
      • 2.Sf2#
      • 2.Qe1#
    • 1...Sb3
      • 2.Sf2#
      • 2.Qe1#
    • 1...Sf3
      • 2.Sf2#
    • 1...Sc4
      • 2.Sf2#
      • 2.Qe1#
    • 1...Se4
      • 2.Qe1#
  • Tries
    • 1.Sb2+?
      • 1...Ke1
        • 2.Sc2#
      • 1...Kc1!
  • Keys
    • 1.Re6!
      • 1...e1Q
        • 2.Rxe1#
      • 1...e1S
        • 2.Sf2#
        • 2.Rxe1#
      • 1...e1B
        • 2.Rxe1#
      • 1...e1R
        • 2.Sf2#
        • 2.Rxe1#
      • 1...Sb1
        • 2.Sf2#
        • 2.Qe1#
      • 1...Sf1
        • 2.Sf2#
        • 2.Qe1#
      • 1...Sb3
        • 2.Sf2#
        • 2.Qe1#
      • 1...Sf3
        • 2.Sf2#
      • 1...Sc4
        • 2.Sf2#
        • 2.Qe1#
      • 1...Se4
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);::S(C)
    • S(b);OGATE::QAR1(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::S(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(E);
    • Vars
      • P(c);OGATE::R1(E),XQ(c)
      • P(c);OGATE::R1(E),XB(c)
      • S(b);::S(C)
      • S(b);OGATE::QAR1(D)
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