MESON Chess Problem Database

Problem Display
PID: 227345 (7B/1Q6/8/8/N7/1K6/1P6/k1b5 w - - 0 1)

Thoma, Andreas

Kieler Schachgesellschaft, 1984

7B/1Q6/8/8/N7/1K6/1P6/k1b5

#2

5 + 2

16882 KSG-Problemschach 1969-1987 (Muck/Laue) 1993
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb2
      • 2.Qh1#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qa6#
        • 2.Qa8#
        • 2.Qa7#
      • 1...Be3
        • 2.Qa6#
      • 1...Bxb2!
    • 1.Qa8?
      • threat
        • 2.Sc3#
      • 1...Kb1
        • 2.Sc3#
      • 1...Bxb2
        • 2.Qh1#
      • 1...Be3!
    • 1.Qa7?
      • threat
        • 2.Sc3#
      • 1...Kb1
        • 2.Sc3#
      • 1...Bxb2
        • 2.Qg1#
      • 1...Be3!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sc3#
      • 1...Kb1
        • 2.Sc3#
      • 1...Bxb2
        • 2.Qf1#

This anticipates 152880(1992)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);OGATEB,P_SPINB(b),XP(A)::QAB1(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::QAR(D)
      • Refutation
        • B(b);XP(A)
    • Try
      • Q(D);
      • Threat
        • QAR(D)+S(C)
      • Vars
        • K(a);P-FLIGHT::S(C)
        • B(b);OGATEB,P_SPINB(b),XP(A)::QAB1(D)
      • Refutation
        • B(b);
    • Try
      • Q(D);
      • Threat
        • QAR(D)+S(C)
      • Vars
        • K(a);P-FLIGHT::S(C)
        • B(b);OGATEB,P_SPINB(b),XP(A)::QAR(D)
      • Refutation
        • B(b);
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+S(C)
    • Vars
      • K(a);P-FLIGHT::S(C)
      • B(b);OGATEB,P_SPINB(b),XP(A)::QAR(D)
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