MESON Chess Problem Database

Problem Display
PID: 76800 (8/8/8/N7/kbQ5/N7/3p4/3K4 w - - 0 1)

Dombey, Father

The Tablet, 1945

(First published on Sat Aug 25 1945)

8/8/8/N7/kbQ5/N7/3p4/3K4

#2

4 + 3

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa3
      • 2.Qb3#
    • 1...Kxa5
      • 2.Qb5#
  • Tries
    • 1.Qc2+?
      • 1...Kxa3
        • 2.Sc4#
        • 2.Qb3#
      • 1...Kxa5!
    • 1.Qc6+?
      • 1...Kxa5
        • 2.Sc4#
        • 2.Qb5#
      • 1...Kxa3!
  • Keys
    • 1.Qd4!
      • 1...Kxa3
        • 2.Qa1#
      • 1...Kxa5
        • 2.Qa7#

Anticipated by 206996(1859), 222837(1884), 193956(1916), 21141(1917), 71194(1917)

This anticipates 142699(1954), 105209(1958), 138156(1962)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINB(c),P-FLIGHT,XS(B)::QAR1(C)
    • K(b);N_SPINB(c),P-FLIGHT,XS(D)::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK,N_PINB(c)
      • Refutation
        • K(b);P-FLIGHT,XS(D)
    • Try
      • Q(C);CHECK,N_PINB(c)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
  • Actual
    • Q(C);
    • Vars
      • K(b);N_SPINB(c),OGATEB,P-FLIGHT,XS(B)::QAR2(C)
      • K(b);N_SPINB(c),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
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