MESON Chess Problem Database

Problem Display
PID: 234673 (8/7r/3N4/8/8/4bQPk/8/7K w - - 0 1)

Lincoln, Robert A

Kudesnik, 2009

8/7r/3N4/8/8/4bQPk/8/7K

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.g4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.g4#
      • 1...Bf4
        • 2.gxf4#
      • 1...Bf2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qf5#
      • 1...Rh4
        • 2.g4#
      • 1...Rh5
        • 2.Qxh5#
      • 1...Rf7
        • 2.Qh5#
      • 1...Rg7
        • 2.Qh5#
      • 1...Bf4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAR(B)+P(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR(B)+P(C)
      • Vars
        • B(a);OGATE::QAR(B)+P(C),XB(a)
      • Refutation
        • B(a);
  • Actual
    • S(D);
    • Threat
      • QAB(B)
    • Vars
      • R(c);SBLOCK::QAR(B)+P(C)
      • R(c);N_GUARD::QAR2(B),XR(c)
      • R(c);N_GUARD::QAR2(B)
      • B(a);N_GUARD::S(D)
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