MESON Chess Problem Database

Problem Display
PID: 120858 (8/1k6/8/1K6/8/8/5Q2/5R2 w - - 0 1)

Froberg, Johan Hilding Laurentius

Springaren, 1963

8/1k6/8/1K6/8/8/5Q2/5R2

#2

3 + 1

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qb6+?
      • 1...Ka8
        • 2.Ra1#
        • 2.Rf8#
      • 1...Kc8!
    • 1.Qa7+?
      • 1...Kc8
        • 2.Rf8#
      • 1...Kxa7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Rf7#
      • 1...Ka7
        • 2.Rf7#
      • 1...Kc7
        • 2.Rf7#

This anticipates 232357(1975)

FEATURES

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