MESON Chess Problem Database

Problem Display
PID: 77691 (k7/7b/K7/8/5b2/3p4/8/Q7 w - - 0 1)

Bie, Hans Petter

Dagbladet, 1970

k7/7b/K7/8/5b2/3p4/8/Q7

#2

2 + 4

145 StrateGems 2007
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qa7#
        • 2.Qb7#
      • 1...Kb8
        • 2.Qb7#
      • 1...Be3
        • 2.Qf8#
        • 2.Qb7#
      • 1...Bb8
        • 2.Qb7#
      • 1...Be4
        • 2.Qa7#
      • 1...Bc7!
    • 1.Qh1+?
      • 1...Kb8
        • 2.Qb7#
      • 1...Be4!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qa7#
      • 1...Kb8
        • 2.Qd8#
      • 1...Be3
        • 2.Qd8#
      • 1...Bb8
        • 2.Qd5#

This anticipates 104522(1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • B(b);::QAB1(A)
        • B(c);::QAR1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);P-FLIGHT::QAR2(A)
      • B(b);N_GUARD::QAR(A)
      • B(b);SBLOCK::QAB(A)
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