MESON Chess Problem Database

Problem Display
PID: 23870 (1B4r1/1P5R/K1k5/5R2/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

1B4r1/1P5R/K1k5/5R2/8/8/8/8

#2

5 + 2

5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.bxc8Q#
      • 2.bxc8R#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Rc7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Rg7
        • 2.b8S#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Rg3!
    • 1.Bg3?
      • threat
        • 2.Rc7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Rg7
        • 2.b8S#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Rxg3!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Rc7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Rg7
        • 2.b8S#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8R#

Anticipated by 141990(1987)

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(D)
      • 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(D)
      • 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(D)
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=Q
      • R(b);N_GUARD::P=S
      • R(b);OGATE::PXR(b)=Q
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