MESON Chess Problem Database

Problem Display
PID: 158963 (K7/N7/kp6/N7/8/8/6Rp/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2016

K7/N7/kp6/N7/8/8/6Rp/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...bxa5
      • 2.Rg6#
  • Tries
    • 1.Ra2?
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.S5c6#
        • 2.Sb7#
      • 1...h1Q+
        • 2.S5c6#
        • 2.Sb7#
      • 1...h1B+
        • 2.S5c6#
        • 2.Sb7#
      • 1...b5
        • 2.Sc4#
      • 1...bxa5!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Ra2#
      • 1...b5
        • 2.Rg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATEB,SBLOCK,XS(B)::R(A)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Vars
        • P(c);::R(A)+S(B)
      • Refutation
        • P(c);P_SPINP(c),XS(B)
  • Actual
    • S(B);
    • Threat
      • R(A)
    • Vars
      • P(c);OGATEB::R(A)
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