MESON Chess Problem Database

Problem Display
PID: 238588 (kN4Bn/8/1K6/8/8/3R4/8/3n4 w - - 0 1)

Lincoln, Robert A

Problemist Ukraini, 2017

kN4Bn/8/1K6/8/8/3R4/8/3n4

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb8
      • 2.Rd8#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Bd5#
        • 2.Rd8#
      • 1...Sc3
        • 2.Rd8#
      • 1...Se3
        • 2.Rd8#
      • 1...Sf7!
    • 1.Sd7?
      • threat
        • 2.Bd5#
        • 2.Ra3#
      • 1...Sb2
        • 2.Bd5#
      • 1...Se3
        • 2.Ra3#
      • 1...Sf7
        • 2.Ra3#
      • 1...Sc3!
    • 1.Rd8?
      • threat
        • 2.Sa6#
        • 2.Sc6#
        • 2.Sd7#
        • 2.Bd5#
      • 1...Sc3
        • 2.Sa6#
        • 2.Sc6#
        • 2.Sd7#
      • 1...Se3
        • 2.Sa6#
        • 2.Sc6#
        • 2.Sd7#
      • 1...Sf7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Ra3#
        • 2.Rd8#
      • 1...Sb2
        • 2.Rd8#
      • 1...Sc3
        • 2.Rd8#
      • 1...Sf7
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,P-FLIGHT,XS(C)::R(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::R(A)
      • Refutation
        • S(c);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::B(D)
        • S(a);::R(A)
        • S(c);::R(A)
      • Refutation
        • S(a);
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Refutation
        • S(c);
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • S(a);::R(A)
      • S(c);::R(A)
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