MESON Chess Problem Database

Problem Display
PID: 79911 (7Q/7K/8/8/6pb/7k/R7/2B5 w - - 0 1)

Ahlheim, Karl-Heinz

Themes-64, 1969

7Q/7K/8/8/6pb/7k/R7/2B5

#2

4 + 3

5454 Near Snap 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Qc3#
    • 1...g3
      • 2.Qc8#
  • Tries
    • 1.Kg7?
      • 1...g3
        • 2.Qc8#
      • 1...Kg3!
    • 1.Kg8?
      • 1...Kg3
        • 2.Qc3#
      • 1...g3!
    • 1.Qc3+?
      • 1...g3
        • 2.Qc8#
      • 1...Bg3!
  • Keys
    • 1.Kg6!
      • 1...Kg3
        • 2.Qc3#
      • 1...g3
        • 2.Qc8#

This anticipates 75190(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(D)
    • P(b);OGATEB,SBLOCK::QAB(D)
  • Tries
    • Try
      • K(C);P-FLIGHT,P_PINB(c)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • K(a);N_SPINB(c),P-FLIGHT
    • Try
      • K(C);P_PINB(c),S_FLIGHT
      • Vars
        • K(a);N_SPINB(c),P-FLIGHT::QAR(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(D)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • K(C);P_PINB(c),S_FLIGHT
    • Vars
      • K(a);N_SPINB(c),P-FLIGHT::QAR(D)
      • P(b);OGATEB,SBLOCK::QAB(D)
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