MESON Chess Problem Database

Problem Display
PID: 157646 (8/7K/5p2/7k/4B2N/6R1/7r/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 2015

8/7K/5p2/7k/4B2N/6R1/7r/8

#2

4 + 3

3713 Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh4
      • 2.Bg6#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Bf3#
        • 2.Bg6#
      • 1...Rh4
        • 2.Bg6#
      • 1...f5
        • 2.Bf3#
      • 1...Rxg2!
    • 1.Sf5?
      • threat
        • 2.Bf3#
      • 1...Rh4
        • 2.Sg7#
      • 1...Rf2!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Bg6#
      • 1...f5
        • 2.Rg5#

Anticipated by 166158(2014)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK,XS(C)::B(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::B(B)
        • P(c);::B(B)
      • Refutation
        • R(a);XS(C)
    • Try
      • S(C);
      • Threat
        • B(B)
      • Vars
        • R(a);SBLOCK::S(C)
      • Refutation
        • R(a);
  • Actual
    • S(C);
    • Threat
      • B(B)
    • Vars
      • P(c);N_GUARD::R1(A)
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