MESON Chess Problem Database

Problem Display
PID: 152881 (k7/8/KR6/1N6/R1b5/2N5/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

k7/8/KR6/1N6/R1b5/2N5/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Sc7#
    • 1...Bb3
      • 2.Sc7#
    • 1...Bxb5+
      • 2.Kxb5#
    • 1...Bd5
      • 2.Sc7#
    • 1...Be6
      • 2.Sc7#
    • 1...Bf7
      • 2.Sc7#
    • 1...Bg8
      • 2.Sc7#
  • Tries
    • 1.Ka5?
      • threat
        • 2.Kb4#
      • 1...Bxb5
        • 2.Kxb5#
      • 1...Bb3!
    • 1.Rb7?
      • threat
        • 2.Kb6#
      • 1...Bb3
        • 2.Sc7#
      • 1...Bxb5+!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc7#
      • 1...Bxb5+
        • 2.Kxb5#
      • 1...Bxd5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(a);N_PINS(C)::S(C)
    • B(a);CHECK,XS(C)::R(B)+K(D),XB(a)
  • Tries
    • Try
      • K(D);N_SPINS(C),P-FLIGHT
      • Threat
        • R(B)+K(D)
      • Vars
        • B(a);XS(C)::R(B)+K(D),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(E);
      • Threat
        • R(B)+K(D)
      • Vars
        • B(a);N_PINS(C)::S(C)
      • Refutation
        • B(a);CHECK,XS(C)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(a);CHECK,XS(C)::R(B)+K(D),XB(a)
      • B(a);N_PINS(C),XS(A)::S(C)
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