MESON Chess Problem Database

Problem Display
PID: 232365 (1q2Q3/3P4/2k5/2P5/2K5/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1977

1q2Q3/3P4/2k5/2P5/2K5/8/8/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.d8S#
    • 1...Qb1
      • 2.Qc8#
    • 1...Qb2
      • 2.Qc8#
    • 1...Qc8
      • 2.Qxc8#
      • 2.dxc8Q#
  • Tries
    • 1.d8R+?
      • 1...Kc7
        • 2.Qd7#
      • 1...Kb7!
  • Keys
    • 1.Qc8+!
      • 1...Qc7
        • 2.d8S#
      • 1...Qxc8
        • 2.dxc8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK::P=S
    • Q(b);N_GUARD::QAR2(D)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);CHECK
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b)::P=S
      • Q(b);OGATE,XQ(D)::PXQ(b)=Q
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