MESON Chess Problem Database

Problem Display
PID: 27327 (1b6/1kpQ4/1BR5/R7/8/8/8/3K4 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

1b6/1kpQ4/1BR5/R7/8/8/8/3K4

#2

5 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Bxc7?
      • threat
        • 2.Rb6#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Ba7!
    • 1.Rc1?
      • 1...Kxb6
        • 2.Qb5#
      • 1...Ba7!
    • 1.Rc2?
      • 1...Kxb6
        • 2.Qb5#
      • 1...Ba7!
    • 1.Rc3?
      • 1...Kxb6
        • 2.Qb5#
      • 1...Ba7!
    • 1.Rc4?
      • 1...Kxb6
        • 2.Qb5#
      • 1...Ba7!
    • 1.Rcc5?
      • 1...Kxb6
        • 2.Rcb5#
        • 2.Qb5#
        • 2.Qc6#
      • 1...Ba7!
    • 1.Rxc7+?
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Kxb6!
    • 1.Qe6?
      • 1...cxb6
        • 2.Qc8#
      • 1...Ba7!
  • Keys
    • 1.Qe8!
      • 1...cxb6
        • 2.Qc8#
      • 1...Ba7
        • 2.Rxa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);XP(b)
      • Threat
        • R1(D)
      • Vars
        • B(c);OGATE,P_SPINB(c),XB(C)::QAR1(E),XB(c)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(C)::QAR1(E)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(C)::QAR1(E)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(C)::QAR1(E)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(C)::QAR1(E)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Refutation
        • B(c);
    • Try
      • R(D);CHECK,XP(b)
      • Vars
        • B(c);OGATE,P_SPINB(c),XR(D)::QAR1(E),XB(c)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);XB(C)::QAB1(E)
      • Refutation
        • B(c);
  • Actual
    • Q(E);N_PINP(b)
    • Vars
      • P(b);XB(C)::QAB1(E)
      • B(c);N_GUARD::R1(B),XB(c)
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