MESON Chess Problem Database

Problem Display
PID: 249153 (n1n5/4R3/kP6/8/1K1B4/8/8/8 w - - 0 1)

Battaglia, Emilio

The Problemist, 1990

n1n5/4R3/kP6/8/1K1B4/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Ra7#
    • 1...Sa7
      • 2.Rxa7#
  • Keys
    • 1.b7!
      • threat
        • 2.bxc8Q#
        • 2.bxc8B#
        • 2.b8S#
      • 1...Sxe7
        • 2.bxa8Q#
      • 1...Sab6
        • 2.b8S#
      • 1...Sc7
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Scb6
        • 2.b8S#
      • 1...Sd6
        • 2.bxa8Q#
        • 2.bxa8R#
        • 2.b8S#
      • 1...Sa7
        • 2.b8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::R1(D)
    • S(c);N_GUARD::R1(D),XS(c)
  • Actual
    • P(C);
    • Threat
      • DUALS(3)
    • Vars
      • S(c);N_GUARD,XR(D)::PXS(b)=Q
      • S(b);::P=S
      • S(b);::PXS(c)=Q
      • S(c);::P=S
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