MESON Chess Problem Database

Problem Display
PID: 166046 (k2N4/2K5/1B6/8/8/3b1R2/1p6/8 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 2017

k2N4/2K5/1B6/8/8/3b1R2/1p6/8

#2

4 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Ra3#
    • 1...Be4
      • 2.Ra3#
    • 1...Bf5
      • 2.Ra3#
    • 1...Bg6
      • 2.Ra3#
    • 1...Bh7
      • 2.Ra3#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Rf8#
      • 1...Bf5
        • 2.Ra3#
      • 1...Bg6
        • 2.Ra3#
      • 1...Ba6!
    • 1.Sb7?
      • threat
        • 2.Rf8#
      • 1...Bf5
        • 2.Ra3#
      • 1...Bg6
        • 2.Ra3#
      • 1...Bb5!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Sc6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sf7#
      • 1...Bb5
        • 2.Sc6#
      • 1...Bf5
        • 2.Se6#
      • 1...Ba6
        • 2.Sb7#
      • 1...Bg6
        • 2.Sf7#

Anticipated by 255923(2007)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE::R(A)
    • B(b);OGATE,SBLOCK::R(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • R(A)
      • Vars
        • B(b);OGATE::R(A)
      • Refutation
        • B(b);
    • Try
      • S(D);
      • Threat
        • R(A)
      • Vars
        • B(b);OGATE::R(A)
      • Refutation
        • B(b);
  • Actual
    • R(A);
    • Threat
      • DUALS(4)
    • Vars
      • B(b);::R(A)+S(D)
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