MESON Chess Problem Database

Problem Display
PID: 175411 (3b2K1/8/4kP2/2Q5/7P/8/2B5/8 w - - 0 1)

Derka, Frantisek

Narodni listy, 1899

3b2K1/8/4kP2/2Q5/7P/8/2B5/8

#2

5 + 2

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qd6#
    • 1...Bxf6
      • 2.Bf5#
  • Tries
    • 1.Bb3+?
      • 1...Kxf6
        • 2.Qg5#
      • 1...Kd7!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Qd6#
      • 1...Kxd5!
  • Keys
    • 1.Be4!
      • 1...Kxf6
        • 2.Qd6#
      • 1...Kd7
        • 2.Qc6#
      • 1...Bxf6
        • 2.Bf5#
      • 1...Ba5
        • 2.Qe7#
      • 1...Bb6
        • 2.Qe7#
      • 1...Bc7
        • 2.Qe7#
      • 1...Be7
        • 2.Qxe7#

This anticipates 23798(1996), 68177(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XP(D)::QAR2(C)
    • B(b);SBLOCK,XP(D)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(D)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(D)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • B(A);
    • Vars
      • K(a);P-FLIGHT,XP(D)::QAR2(C)
      • K(a);S_FLIGHT::QAB1(C)
      • B(b);SBLOCK,XP(D)::B(A)
      • B(b);N_GUARD::QAR1(C)
      • B(b);N_GUARD::QAR1(C),XB(b)
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