MESON Chess Problem Database

Problem Display
PID: 68825 (8/8/8/4K3/7N/8/1N2k1B1/1nQ5 w - - 0 1)

Fedyakov, Sergey

2nd Prize, Nikolaev-200 JT, 1989

8/8/8/4K3/7N/8/1N2k1B1/1nQ5

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qe3#
      • 1...Kf2
        • 2.Qe3#
      • 1...Sd2!
    • 1.Kf4?
      • threat
        • 2.Qe3#
      • 1...Kf2
        • 2.Qe3#
        • 2.Qf1#
      • 1...Sd2!
    • 1.Sd3?
      • threat
        • 2.Bf1#
      • 1...Kxd3
        • 2.Bf1#
      • 1...Sd2!
    • 1.Sf5?
      • threat
        • 2.Qe3#
      • 1...Kf2
        • 2.Qf1#
      • 1...Sd2!
    • 1.Qd1+?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kf2!
    • 1.Qf1+?
      • 1...Ke3
        • 2.Sc4#
        • 2.Qe1#
      • 1...Kd2!
    • 1.Qc2+?
      • 1...Ke1
        • 2.Sd3#
        • 2.Sf3#
      • 1...Ke3
        • 2.Sd1#
        • 2.Sc4#
        • 2.Sf5#
      • 1...Sd2!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qf1#
      • 1...Kf2
        • 2.Qe3#
      • 1...Kd3
        • 2.Bf1#
      • 1...Sd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR1(A)
      • Refutation
        • S(a);
    • Try
      • S(B);
      • Threat
        • B(C)
      • Vars
        • K(b);S_FLIGHT,XS(B)::B(C)
      • Refutation
        • S(a);
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::B(C)
      • S(a);N_GUARD::QAR1(A),XS(a)
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