MESON Chess Problem Database

Problem Display
PID: 234558 (8/8/5K2/1P6/Q3pk2/1n1R4/8/3B4 w - - 0 1)

Speckmann, Werner

Berliner Morgenpost, 1964

8/8/5K2/1P6/Q3pk2/1n1R4/8/3B4

#2

5 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qf2#
        • 2.Qe3#
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sd2
        • 2.Qe3#
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sxd4!
    • 1.Qa7?
      • threat
        • 2.Qf2#
        • 2.Qe3#
        • 2.Qb8#
        • 2.Qc7#
      • 1...e3
        • 2.Qxe3#
      • 1...Sd2
        • 2.Qe3#
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sd4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc7#
      • 1...exd3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qb8#
      • 1...exd3
        • 2.Qf3#
      • 1...e3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Refutation
        • S(a);N_SPINP(b),XQ(C)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • DUALS(4)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • P(b);XR(B)
  • Actual
    • Q(C);N_PINP(b)
    • Threat
      • QAB(C)
    • Vars
      • P(b);OGATE,XR(B)::QAR1(C)
      • P(b);OGATE::QAR1(C)
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