MESON Chess Problem Database

Problem Display
PID: 27876 (RBq5/2b5/1kPP4/3Q4/8/2Kn4/2R5/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

RBq5/2b5/1kPP4/3Q4/8/2Kn4/2R5/8

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Bxc7#
    • 1...Qg4
      • 2.Bxc7#
    • 1...Qf5
      • 2.Bxc7#
    • 1...Qa6
      • 2.Bxc7#
    • 1...Qe6
      • 2.Bxc7#
    • 1...Qe8
      • 2.Bxc7#
    • 1...Qf8
      • 2.Bxc7#
    • 1...Qg8
      • 2.Bxc7#
    • 1...Se1
      • 2.Rb2#
    • 1...Sb2
      • 2.Rxb2#
    • 1...Sf2
      • 2.Rb2#
    • 1...Sf4
      • 2.Rb2#
    • 1...Se5
      • 2.Rb2#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qa5#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Qf5
        • 2.Bxc7#
      • 1...Qa6
        • 2.Bxc7#
      • 1...Qe6
        • 2.Bxc7#
      • 1...Qg8
        • 2.Bxc7#
      • 1...Sc1+!
    • 1.Rb2+?
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sxb2!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qa5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Qf5
        • 2.Bxc7#
      • 1...Qa6
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(d);N_GUARD::B(G),XB(c)
    • S(a);N_GUARD::R(A)
    • S(a);N_GUARD::R(A),XS(a)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
        • Q(d);N_GUARD::B(G),XB(c)
        • Q(d);N_GUARD,P_PINQ(C)::B(G),XB(c)
      • Refutation
        • S(a);CHECK
    • Try
      • R(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R(A),XS(a)
      • Refutation
        • S(a);XR(A)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAB1(C)
    • Vars
      • S(a);N_GUARD::QAB1(C),XS(a)
      • Q(d);N_GUARD::B(G),XB(c)
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