MESON Chess Problem Database

Problem Display
PID: 141990 (1r3B2/2R2P2/4k1K1/7R/8/8/8/8 w - - 0 1)

Lipton, Michael

Deutsche Schachzeitung, 1987

1r3B2/2R2P2/4k1K1/7R/8/8/8/8

#2

5 + 2

5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8R#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Re7#
      • 1...Rg8+
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rb7
        • 2.f8S#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Rb4!
    • 1.Bb4?
      • threat
        • 2.Re7#
      • 1...Rg8+
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rb7
        • 2.f8S#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Rxb4!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Re7#
      • 1...Rg8+
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rb7
        • 2.f8S#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#

This anticipates 23870(1996)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE::PXR(b)=Q
  • Tries
    • Try
      • B(E);
      • Threat
        • R1(C)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
        • R(b);N_GUARD::P=S
        • R(b);OGATE::PXR(b)=Q
      • Refutation
        • R(b);
    • Try
      • B(E);
      • Threat
        • R1(C)
      • Vars
        • R(b);CHECK,OGATE::PXR(b)=Q
        • R(b);N_GUARD::P=S
        • R(b);OGATE::PXR(b)=Q
      • Refutation
        • R(b);XB(E)
  • Actual
    • B(E);
    • Threat
      • R1(C)
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=Q
      • R(b);N_GUARD::P=S
      • R(b);OGATE::PXR(b)=Q
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