MESON Chess Problem Database

Problem Display
PID: 134226 (4k3/K7/5Q2/3P2N1/b5rB/7B/8/8 w - - 0 1)

Lipton, Michael

1st HM., Harrogate, 2009

4k3/K7/5Q2/3P2N1/b5rB/7B/8/8

#2

6 + 3

56 The Problemist 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qd8#
      • 1...Rxh4
        • 2.Sd6#
      • 1...Re4
        • 2.Sd6#
      • 1...Rg5
        • 2.Sd6#
      • 1...Kf8!
    • 1.Sh7?
      • threat
        • 2.Qe7#
        • 2.Qe6#
      • 1...Kd7
        • 2.Qd8#
      • 1...Rxh4
        • 2.Qf8#
      • 1...Re4
        • 2.Qg6#
        • 2.Qf8#
      • 1...Rg5
        • 2.Qf8#
      • 1...Rg6
        • 2.Qe7#
        • 2.Qxg6#
        • 2.Qf8#
      • 1...Bd7
        • 2.Qe7#
        • 2.Qf8#
      • 1...Rg7+!
    • 1.Qe6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
    • 1.d6?
      • threat
        • 2.Qe7#
      • 1...Re4
        • 2.Qh8#
      • 1...Kd7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qe7#
      • 1...Rg7+
        • 2.Sxg7#
      • 1...Kd7
        • 2.Qd8#
      • 1...Rxh4
        • 2.Sc7#
        • 2.Sg7#
      • 1...Rg5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(E)
      • Vars
        • K(c);P_SPINR(b),S_FLIGHT::QAR1(E)
        • R(b);XB(B)::S(D)
        • R(b);::S(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P_SPINR(b),S_FLIGHT::QAR1(E)
        • R(b);XB(B)::QAR1(E)
        • R(b);::QAR1(E)
      • Refutation
        • R(b);CHECK
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(E)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(C);
      • Threat
        • QAR1(E)
      • Vars
        • R(b);::QAR(E)
      • Refutation
        • K(c);P_SPINR(b),S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR1(E)
    • Vars
      • R(b);CHECK,N_GUARD::S(D),XR(b)
      • K(c);S_FLIGHT::QAR1(E)
      • R(b);::S(D)
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