MESON Chess Problem Database

Problem Display
PID: 234696 (8/8/8/7Q/8/1r3NPK/5B2/7k w - - 0 1)

Lincoln, Robert A

Kudesnik, 2011

8/8/8/7Q/8/1r3NPK/5B2/7k

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Qxf3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qd1#
      • 1...Rxg3+
        • 2.Kxg3#
      • 1...Rb1
        • 2.Qf3#
        • 2.Qd5#
      • 1...Rf3
        • 2.Qxf3#
      • 1...Re3!
  • Keys
    • 1.Se1!
      • threat
        • 2.Kg4#
      • 1...Rxg3+
        • 2.Kxg3#
      • 1...Rb4
        • 2.Qf3#
      • 1...Rb5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE,P_PINP(C),XS(B)::QAB(E),XR(b)
  • Tries
    • Try
      • S(B);P_SPINP(C)
      • Threat
        • QAR(E)
      • Vars
        • R(b);CHECK,XP(C)::QAR(E)+K(D),XR(b)
        • R(b);N_GUARD::QAB(E),XR(b)
      • Refutation
        • R(b);
  • Actual
    • S(B);P_SPINP(C)
    • Threat
      • QAR(E)+K(D)
    • Vars
      • R(b);CHECK,XP(C)::QAR(E)+K(D),XR(b)
      • R(b);N_GUARD,N_PINP(C)::QAB(E)
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