MESON Chess Problem Database

Problem Display
PID: 27324 (3B3K/Q7/3P4/Rb6/1kP5/n3N3/2P5/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

3B3K/Q7/3P4/Rb6/1kP5/n3N3/2P5/8

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Sd5#
  • Tries
    • 1.Ra4+?
      • 1...Bxa4
        • 2.Ba5#
        • 2.Qa5#
      • 1...Kc3!
    • 1.Rxb5+?
      • 1...Kc3
        • 2.Ba5#
      • 1...Sxb5!
    • 1.Qd4?
      • threat
        • 2.Sd5#
      • 1...Bc6
        • 2.Qb2#
        • 2.Qd2#
      • 1...Sxc2!
  • Keys
    • 1.Bf6!
      • 1...Bxc4
        • 2.Qc5#
      • 1...Sxc2
        • 2.Rxb5#
      • 1...Sxc4
        • 2.Sd5#
      • 1...Ba6
        • 2.Qc5#
      • 1...Ba4
        • 2.Rxa4#
        • 2.Qc5#
      • 1...Bc6
        • 2.Qc5#
      • 1...Bd7
        • 2.Qc5#
      • 1...Be8
        • 2.Qc5#
      • 1...Sb1
        • 2.Rxb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK,XP(C)::S(B)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK,XB(c)
      • Vars
        • K(b);S_FLIGHT::B(G)
      • Refutation
        • S(a);XR(D)
    • Try
      • Q(F);
      • Threat
        • S(B)
      • Refutation
        • S(a);XP(A)
  • Actual
    • B(G);
    • Vars
      • B(c);XP(C)::QAB1(F)
      • S(a);N_GUARD,XP(A)::R1(D),XB(c)
      • S(a);SBLOCK,XP(C)::S(B)
      • B(c);::QAB1(F)
      • S(a);N_GUARD::R1(D),XB(c)
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