MESON Chess Problem Database

Problem Display
PID: 27666 (kb6/q7/1BP1K3/2N5/R7/6Q1/8/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

kb6/q7/1BP1K3/2N5/R7/6Q1/8/8

#2

6 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qg8?
      • threat
        • 2.Rxa7#
      • 1...Qa5
        • 2.Rxa5#
      • 1...Qa6
        • 2.Rxa6#
      • 1...Qxa4!
    • 1.c7?
      • threat
        • 2.Qg2#
        • 2.Qf3#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Qa5
        • 2.Qg2#
        • 2.Qf3#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Qa6
        • 2.Qg2#
        • 2.Qf3#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Bxc7!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qxb8#
      • 1...Bxg3
        • 2.Rxa7#
      • 1...Bf4
        • 2.Rxa7#
      • 1...Be5
        • 2.Rxa7#
      • 1...Bd6
        • 2.Rxa7#
      • 1...Bc7
        • 2.Rxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);P_PINB(c)
      • Threat
        • R1(B),XQ(a)
      • Vars
        • Q(a);OGATEB::R(B),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(B)
    • Try
      • P(E);
      • Threat
        • DUALS(4)
      • Refutation
        • B(c);XP(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(A),XB(c)
    • Vars
      • B(c);N_GUARD,XQ(A)::R1(B),XQ(a)
      • B(c);N_GUARD::R1(B),XQ(a)
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