MESON Chess Problem Database

Problem Display
PID: 69847 (6B1/8/R1n3pB/2RNNkpp/8/7P/3K3P/Q7 w - - 0 1)

Burger, Robert Eugene

Comm., US Problem Bulletin, 1993

6B1/8/R1n3pB/2RNNkpp/8/7P/3K3P/Q7

#2

10 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qf1#
      • 1...Kf4
        • 2.Qf1#
      • 1...Sd4
        • 2.Sd3#
        • 2.Sxg6#
      • 1...Kf6!
    • 1.Sxg6?
      • threat
        • 2.Qb1#
      • 1...Kxg6
        • 2.Qf6#
      • 1...Sb4
        • 2.Qe5#
      • 1...Sd4
        • 2.Sc3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Ke4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qf1#
      • 1...Kf4
        • 2.Qf1#
      • 1...Kxf6
        • 2.Sxc6#
      • 1...Sd4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR(A)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(d)
    • Try
      • S(G);XP(e)
      • Threat
        • QAB(A)
      • Vars
        • K(a);P_SPINS(d),S_FLIGHT,XS(G)::QAR1(A)
        • S(d);N_GUARD::QAR1(A)
        • S(d);N_GUARD::R(E)+S(F)
        • S(d);N_GUARD::QAR1(A),XS(d)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAR(A)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR(A)
      • K(a);P-FLIGHT,P_SPINS(d),XS(F)::QAB(A)+S(G),XS(d)
      • S(d);N_GUARD::R(E)+S(G)
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