MESON Chess Problem Database

Problem Display
PID: 53569 (8/5K2/3N3p/7k/5Q2/8/5b2/7r w - - 0 1)

Lincoln, Robert A

Sp. HM., Uralski Problemist, 2004

8/5K2/3N3p/7k/5Q2/8/5b2/7r

#2

3 + 4

145 StrateGems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Qf5#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sg7#
      • 1...Bd4
        • 2.Sg3#
      • 1...Rg1!
    • 1.Se8?
      • threat
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rg1
        • 2.Sf6#
      • 1...Bh4
        • 2.Sg7#
      • 1...Bd4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Bd4
        • 2.Sg3#
      • 1...Bh4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::QAR2(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • B(b);N_GUARD::S(B)
      • Refutation
        • R(a);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(B)
        • B(b);::S(B)
      • Refutation
        • B(b);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(b);N_GUARD::S(B)
      • B(b);SBLOCK::QAB(A)
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