MESON Chess Problem Database

Problem Display
PID: 27207 (2Q5/Pbn5/1kq1P3/2RB4/1P5K/2N5/8/R7 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

2Q5/Pbn5/1kq1P3/2RB4/1P5K/2N5/8/R7

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxb7#
    • 1...Qb5
      • 2.Qxb7#
      • 2.Qxc7#
    • 1...Qxd5
      • 2.Qxc7#
    • 1...Qd7
      • 2.Qxb7#
    • 1...Qe8
      • 2.Qxb7#
      • 2.Qxc7#
    • 1...Qxc5
      • 2.Qxb7#
    • 1...Qd6
      • 2.Qxb7#
    • 1...Qxe6
      • 2.Qxb7#
      • 2.Qxc7#
  • Tries
    • 1.Sa4+?
      • 1...Ka6
        • 2.Ra5#
      • 1...Qxa4
        • 2.Qxb7#
      • 1...Kxa7!
    • 1.Rb5+?
      • 1...Qxb5
        • 2.Qxb7#
      • 1...Sxb5!
    • 1.Qxc7+?
      • 1...Qxc7
        • 2.Rb5#
      • 1...Kxc7!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Rxc6#
      • 1...Qxd5
        • 2.Qxc7#
      • 1...Qxc5
        • 2.Qxb7#
      • 1...Qxe6
        • 2.Qxc7#
        • 2.Qxb7#
      • 1...Sxd5
        • 2.a8S#
      • 1...Qa4
        • 2.Qxb7#
      • 1...Qb5
        • 2.Qxc7#
        • 2.Qxb7#
      • 1...Qd7
        • 2.Qxb7#
      • 1...Qe8
        • 2.Qxc7#
        • 2.Qxb7#
      • 1...Qd6
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD,P_PINP(C)::QAR1(I),XB(c)
    • Q(b);N_GUARD,XB(F)::QAB1(I),XS(d)
    • Q(b);N_GUARD::QAR1(I),XB(c)
    • Q(b);N_GUARD,XR(E)::QAR1(I),XB(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINB(c)::R1(E)
        • Q(b);P_PINP(C),XS(B)::QAR1(I),XB(c)
      • Refutation
        • K(a);S_FLIGHT,XP(H)
    • Try
      • R(E);CHECK
      • Vars
        • Q(b);XR(E)::QAR1(I),XB(c)
      • Refutation
        • S(d);XR(E)
    • Try
      • Q(I);CHECK,XS(d)
      • Vars
        • Q(b);SBLOCK,XQ(I)::R1(E)
      • Refutation
        • K(a);P_SPINQ(b),S_FLIGHT,XQ(I)
  • Actual
    • Q(I);P_PINB(c)
    • Threat
      • R1(E),XQ(b)
    • Vars
      • Q(b);N_GUARD,XB(F)::QAB1(I),XS(d)
      • Q(b);N_GUARD,XR(E)::QAR1(I),XB(c)
      • S(d);N_GUARD,XB(F)::P=S
      • Q(b);N_GUARD,P_PINP(C)::QAR1(I),XB(c)
      • Q(b);N_GUARD::QAR1(I),XB(c)
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