MESON Chess Problem Database

Problem Display
PID: 78599 (r5B1/8/1Q6/8/k7/8/P7/1n5K w - - 0 1)

Backe, Espen

Dagbladet, 1986

r5B1/8/1Q6/8/k7/8/P7/1n5K

#2

4 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qb3#
    • 1...Ra5
      • 2.Qb3#
    • 1...Sa3
      • 2.Bb3#
  • Tries
    • 1.Qb5+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxb5!
  • Keys
    • 1.a3!
      • threat
        • 2.Qb4#
      • 1...Kxa3
        • 2.Qb3#
      • 1...Sxa3
        • 2.Bb3#
      • 1...Rb8
        • 2.Qa6#

This anticipates 237703(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • R(c);SBLOCK::QAB1(C)
    • S(a);SBLOCK::B(D)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT,XP(B)::QAR1(C)
      • S(a);SBLOCK,XP(B)::B(D)
      • R(c);N_GUARD::QAR2(C)
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