MESON Chess Problem Database

Problem Display
PID: 23022 (4k2K/1q3R2/8/1b6/5Q1B/8/8/8 w - - 0 1)

Zinoviev, Nikolai

1st Prize, Smena, 1989

4k2K/1q3R2/8/1b6/5Q1B/8/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Rf8#
    • 1...Bd7
      • 2.Rf8#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Qb8#
        • 2.Qf7#
      • 1...Bc4
        • 2.Qb8#
      • 1...Bd7!
    • 1.Qe5+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Kxf7!
    • 1.Qd6?
      • threat
        • 2.Rf8#
        • 2.Qf8#
      • 1...Qxf7
        • 2.Qd8#
      • 1...Qf3
        • 2.Qe7#
        • 2.Qf8#
        • 2.Qe6#
      • 1...Qe7
        • 2.Qxe7#
      • 1...Kxf7!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...Kxf7
        • 2.Qg8#
      • 1...Qxf7
        • 2.Qc8#
      • 1...Qg2
        • 2.Qe6#
      • 1...Qe7!
    • 1.Qf5?
      • threat
        • 2.Rf8#
      • 1...Qxf7
        • 2.Qc8#
      • 1...Qe7!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qg8#
      • 1...Kxf7
        • 2.Qg8#
      • 1...Qxf7
        • 2.Qd8#
      • 1...Qe7
        • 2.Qxe7#
      • 1...Qg2
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK::R1(C)
    • B(a);SBLOCK::R1(C)
  • Tries
    • Try
      • R(C);XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(A),XQ(b)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);SBLOCK,XR(C)::QAR1(A)
        • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAB1(A)
        • Q(b);N_GUARD,SBLOCK,XR(C)::QAR2(A)
        • Q(b);N_GUARD::QAR2(A)
      • Refutation
        • Q(b);
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • Q(b);N_GUARD,SBLOCK,XR(C)::QAR2(A)
      • Refutation
        • Q(b);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(c);S_FLIGHT,XR(C)::QAB1(A)
      • Q(b);SBLOCK,XR(C)::QAR1(A)
      • Q(b);N_GUARD::QAR1(A),XQ(b)
      • Q(b);N_GUARD::QAR1(A)
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