MESON Chess Problem Database

Problem Display
PID: 135377 (8/4P3/1k6/2N5/4Q3/K7/8/8 w - - 0 1)

Laib, Kurt Friedrich

Kieler Neueste Nachrichten, 1933

8/4P3/1k6/2N5/4Q3/K7/8/8

#2

4 + 1

5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qb4#
    • 1...Ka7
      • 2.Qb7#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Qb7#
      • 1...Ka7
        • 2.Qb7#
      • 1...Kc7!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Sb3#
        • 2.Sb7#
        • 2.Qa6#
      • 1...Ka7
        • 2.Qb7#
      • 1...Kxc6!
    • 1.Qb7+?
      • 1...Ka5
        • 2.Sb3#
        • 2.Qa6#
        • 2.Qb4#
      • 1...Kxc5!
  • Keys
    • 1.e8Q!
      • 1...Ka5
        • 2.Qb4#
      • 1...Kxc5
        • 2.Q8c6#
      • 1...Ka7
        • 2.Qb7#
      • 1...Kc7
        • 2.Q4c6#

This anticipates 96933(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
    • K(a);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • P(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT,XS(C)::QAR1(D)
      • K(a);S_FLIGHT::QAR1(B)
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