MESON Chess Problem Database

Problem Display
PID: 8003 (8/5Q2/8/B2n4/5NN1/8/7K/5k2 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

8/5Q2/8/B2n4/5NN1/8/7K/5k2

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qc4#
    • 1...Sc7
      • 2.Qc4#
    • 1...Se7
      • 2.Qc4#
  • Tries
    • 1.Se2+?
      • 1...Sf4
        • 2.Sg3#
      • 1...Sf6
        • 2.Sg3#
      • 1...Kxe2!
    • 1.Sh5+?
      • 1...Sf4
        • 2.Sg3#
      • 1...Sf6
        • 2.Sg3#
        • 2.Qc4#
      • 1...Ke2!
    • 1.Qd7?
      • threat
        • 2.Qb5#
      • 1...Sxf4
        • 2.Qd1#
      • 1...Sb4
        • 2.Qd1#
      • 1...Se3
        • 2.Qd3#
      • 1...Sb6
        • 2.Qd1#
        • 2.Qd3#
      • 1...Sc7
        • 2.Qd1#
        • 2.Qd3#
      • 1...Sc3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qa6#
        • 2.Qb1#
        • 2.Qb5#
      • 1...Sxf4
        • 2.Qf3#
      • 1...Sc3
        • 2.Qh1#
      • 1...Sb4
        • 2.Qh1#
      • 1...Se3
        • 2.Qh1#
        • 2.Qf3#
      • 1...Sb6
        • 2.Qh1#
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sc7
        • 2.Qh1#
        • 2.Qg2#
        • 2.Qf3#
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);OGATE::QAB(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • S(b);OGATE,XS(B)::QAR2(E)
        • S(b);OGATE::QAR2(E)
        • S(b);OGATE::QAB(E)
      • Refutation
        • S(b);
  • Actual
    • Q(E);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);OGATE,XS(B)::QAR2(E)
      • S(b);OGATE::QAR2(E)
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