MESON Chess Problem Database

Problem Display
PID: 259124 (4B3/2N1k3/3pNp2/8/8/1K3p2/1Q6/8 w - - 0 1)

Sigalov, Aleksandr I

Buletin Problemistic, 1984

4B3/2N1k3/3pNp2/8/8/1K3p2/1Q6/8

#2

5 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qa3#
    • 1...f5
      • 2.Qg7#
  • Tries
    • 1.Ka2?
      • 1...d5
        • 2.Qa3#
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Kc2?
      • 1...d5
        • 2.Qa3#
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Ka3?
      • 1...d5
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Ka4?
      • 1...d5
        • 2.Qa3#
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Qa1?
      • 1...d5
        • 2.Qa3#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Qc1?
      • 1...d5
        • 2.Qa3#
        • 2.Qc5#
      • 1...f5
        • 2.Qg5#
      • 1...f2!
    • 1.Qc3?
      • 1...d5
        • 2.Qb4#
        • 2.Qc5#
      • 1...f5
        • 2.Qg7#
      • 1...f2!
    • 1.Qd4?
      • 1...d5
        • 2.Qc5#
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
        • 2.Qh4#
      • 1...f2!
    • 1.Qc2?
      • threat
        • 2.Qh7#
      • 1...d5
        • 2.Qc5#
      • 1...f5!
    • 1.Qd2?
      • 1...d5
        • 2.Qb4#
      • 1...f5
        • 2.Qg5#
      • 1...f2!
    • 1.Qh2?
      • threat
        • 2.Qh7#
      • 1...f5
        • 2.Qh4#
      • 1...d5!
  • Keys
    • 1.Qf2!
      • 1...d5
        • 2.Qc5#
      • 1...f5
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(A)
    • P(c);OGATE::QAR2(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(c);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • P(b);OGATEB::QAB(A)
      • P(c);OGATEB::QAB(A)
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