MESON Chess Problem Database

Problem Display
PID: 149823 (K1Q5/8/pN1p4/kp1P4/3P4/p7/P7/8 w - - 0 1)

Buchner, Richard

Promadas, 1930

K1Q5/8/pN1p4/kp1P4/3P4/p7/P7/8

#2

6 + 5

15148 Sadier Collection 2014
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb6
      • 2.Qd8#
  • Tries
    • 1.Ka7?
      • 1...b4
        • 2.Qxa6#
      • 1...Kb4!
    • 1.Qd7?
      • 1...Kxb6
        • 2.Qd8#
      • 1...b4
        • 2.Sc4#
      • 1...Kb4!
    • 1.Qc6?
      • 1...b4
        • 2.Sc4#
      • 1...Kb4!
  • Keys
    • 1.Qe8!
      • 1...Kb4
        • 2.Qe1#
      • 1...Kxb6
        • 2.Qd8#
      • 1...b4
        • 2.Sc4#

Anticipated by 174965(1901)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(F)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(F),XP(d)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(F)
        • P(c);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • P(c);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::QAB(F)
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(F)
      • P(c);N_GUARD,SBLOCK::S(D)
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