MESON Chess Problem Database

Problem Display
PID: 27197 (2Q5/2b5/NkqP1P2/3R4/6PK/8/8/R4B2 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

2Q5/2b5/NkqP1P2/3R4/6PK/8/8/R4B2

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxc7#
    • 1...Qb5
      • 2.Qxc7#
    • 1...Qxd5
      • 2.Qxc7#
    • 1...Qa8
      • 2.Qxc7#
    • 1...Qe8
      • 2.Qxc7#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Ra6#
        • 2.Qa6#
      • 1...Qxd5
        • 2.Qxc7#
      • 1...Bxd6
        • 2.Ra6#
        • 2.Qxc6#
      • 1...Qa4
        • 2.Qxc7#
      • 1...Qb5
        • 2.Rxb5#
        • 2.Qxc7#
      • 1...Qb7
        • 2.Rb5#
      • 1...Qa8
        • 2.Rb5#
        • 2.Qxc7#
      • 1...Qc4!
    • 1.Sb8?
      • threat
        • 2.Ra6#
        • 2.Qa6#
      • 1...Qxd5
        • 2.Qxc7#
      • 1...Bxd6
        • 2.Ra6#
        • 2.Qxc6#
      • 1...Qa4
        • 2.Qxc7#
      • 1...Qb5
        • 2.Rxb5#
        • 2.Qxc7#
      • 1...Qb7
        • 2.Rb5#
      • 1...Qa8
        • 2.Rb5#
        • 2.Qxc7#
      • 1...Qc4!
    • 1.Rb5+?
      • 1...Qxb5
        • 2.Qxc7#
      • 1...Ka7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Ra6#
        • 2.Qa6#
      • 1...Qxd5
        • 2.Qxc7#
      • 1...Bxd6
        • 2.Ra6#
      • 1...Qa4
        • 2.Qxc7#
      • 1...Qb5
        • 2.Qb7#
        • 2.Qxc7#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Qa8
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,P_PINP(C)::QAB1(I),XB(c)
    • Q(b);N_GUARD::QAB1(I),XB(c)
    • Q(b);N_GUARD,XR(E)::QAB1(I),XB(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_GUARD,XR(E)::QAB1(I),XB(c)
        • Q(b);N_GUARD::QAB1(I),XB(c)
        • Q(b);N_GUARD::R1(E)
      • Refutation
        • Q(b);P_PINP(C)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_GUARD,XR(E)::QAB1(I),XB(c)
        • Q(b);N_GUARD,P_PINP(C)::QAB1(I),XB(c)
        • Q(b);N_GUARD::R1(E)
      • Refutation
        • Q(b);P_PINP(C)
    • Try
      • R(E);CHECK
      • Vars
        • Q(b);XR(E)::QAB1(I),XB(c)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);N_GUARD,XR(E)::QAB1(I),XB(c)
      • B(c);XP(G)::R1(A)
      • Q(b);N_GUARD,P_PINP(C)::QAB1(I),XB(c)
      • Q(b);N_GUARD::QAR1(I),XQ(b)
      • Q(b);N_GUARD::QAB1(I),XB(c)
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