MESON Chess Problem Database

Problem Display
PID: 27225 (K7/5Rn1/R4b2/3P1kqP/5P2/2B4P/8/6Q1 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

K7/5Rn1/R4b2/3P1kqP/5P2/2B4P/8/6Q1

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qg6#
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qb1#
        • 2.Qxg5#
      • 1...Qxf4
        • 2.Rxf6#
        • 2.Qg6#
      • 1...Qxg1
        • 2.Rxf6#
      • 1...Qxh5
        • 2.Rxf6#
        • 2.Qb1#
      • 1...Qh4
        • 2.Qb1#
        • 2.Qg6#
      • 1...Qh6
        • 2.Qb1#
        • 2.Qg4#
      • 1...Qg2
        • 2.Rxf6#
      • 1...Qg3
        • 2.Rxf6#
      • 1...Qg4
        • 2.Rxf6#
        • 2.Qb1#
        • 2.Qxg4#
        • 2.hxg4#
      • 1...Qg6
        • 2.Qb1#
        • 2.Qxg6#
      • 1...Se6
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE,SBLOCK,XP(D)::QAB1(A)
  • Actual
    • R(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);N_GUARD,XQ(A)::R1(H),XB(c)
      • Q(b);N_GUARD,P_PINP(E)::R1(H),XB(c)
      • Q(b);N_GUARD::R1(H),XB(c)
      • S(d);::QAB(A)
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