MESON Chess Problem Database

Problem Display
PID: 227018 (8/5pQ1/5pb1/8/7K/8/6k1/5R1R w - - 0 1)

Upperly, Charles

US Problem Bulletin, 1985

8/5pQ1/5pb1/8/7K/8/6k1/5R1R

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qb2#
  • Tries
    • 1.Qxf6?
      • threat
        • 2.Rfg1#
        • 2.Qg5#
        • 2.Qf2#
        • 2.Qf3#
      • 1...Be4
        • 2.Rfg1#
        • 2.Qg5#
        • 2.Qf2#
      • 1...Bh5
        • 2.Rfg1#
        • 2.Qf2#
      • 1...Bf5!
  • Keys
    • 1.Qg8!
      • 1...f5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR(D)
  • Tries
    • Try
      • Q(D);N_PINB(c),XP(b)
      • Threat
        • DUALS(4)
      • Refutation
        • B(c);
  • Actual
    • Q(D);
    • Vars
      • P(b);::QAB(D)
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