MESON Chess Problem Database

Problem Display
PID: 266707 (5k1K/1q3N2/4QP2/3p4/8/8/8/8 w - - 0 1)

Fokin, Yuri Georgievich

Zadachi i Etyudi, 2011

5k1K/1q3N2/4QP2/3p4/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qe7#
    • 1...Qc6
      • 2.Qe7#
    • 1...Qa8
      • 2.Qe7#
    • 1...Qc8
      • 2.Qe7#
    • 1...Qb1
      • 2.Qe7#
    • 1...Qb2
      • 2.Qe7#
    • 1...Qb3
      • 2.Qe7#
    • 1...Qb5
      • 2.Qe7#
    • 1...Qb6
      • 2.Qe7#
    • 1...Qe7
      • 2.Qxe7#
    • 1...Qb8
      • 2.Qe7#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sg6#
        • 2.Qg8#
      • 1...Qg7+
        • 2.fxg7#
      • 1...Qe7
        • 2.Qg8#
        • 2.Qxe7#
      • 1...Qb1
        • 2.Sd7#
        • 2.Qf7#
        • 2.Qc8#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qh7+!
    • 1.Sd6?
      • threat
        • 2.Qg8#
        • 2.Qe8#
      • 1...Qg7+
        • 2.fxg7#
      • 1...Qc6
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qa8
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qc8
        • 2.Qf7#
        • 2.Qxc8#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qb5
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qd7
        • 2.Qg8#
      • 1...Qe7
        • 2.Qg8#
        • 2.Qxe7#
        • 2.fxe7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qb8
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Qh7+!
    • 1.Sh6?
      • threat
        • 2.Qg8#
      • 1...Qg7+
        • 2.fxg7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qh7+!
    • 1.Sd8?
      • threat
        • 2.Qg8#
      • 1...Qg7+
        • 2.fxg7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qh7+!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qg8#
      • 1...Qg7+
        • 2.fxg7#
      • 1...Qh7+
        • 2.Sxh7#
      • 1...Qf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAB1(A)
    • Q(b);N_GUARD,P_PINP(B)::QAB1(A)
    • Q(b);N_GUARD::QAB1(A),XQ(b)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Refutation
        • Q(b);CHECK
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • Q(b);::QAR1(A)
        • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Refutation
        • Q(b);CHECK
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Refutation
        • Q(b);CHECK
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Refutation
        • Q(b);CHECK
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • Q(b);CHECK,OGATE::P(B),XQ(b)
      • Q(b);CHECK,N_GUARD::S(C),XQ(b)
      • Q(b);N_GUARD::QAR1(A),XQ(b)
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