MESON Chess Problem Database

Problem Display
PID: 206283 (5B2/3p4/4p3/3pk3/8/p2B4/P3K3/5Q2 w - - 0 1)

Henke, Karl

Funkschach, 1925

5B2/3p4/4p3/3pk3/8/p2B4/P3K3/5Q2

#2

5 + 5

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa1#
    • 1...d6
      • 2.Bg7#
  • Tries
    • 1.Kd2?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qf4#
      • 1...d6
        • 2.Bg7#
      • 1...d4!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qa1#
      • 1...Kxd6!
    • 1.Be7?
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qa1#
      • 1...d4!
    • 1.Qf2?
      • 1...d6
        • 2.Bg7#
      • 1...d4!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Qa1#
      • 1...Kf6
        • 2.Qf4#
      • 1...d4
        • 2.Qg5#
      • 1...d6
        • 2.Bg7#

Anticipated by 9476(1904)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(A)
    • P(e);SBLOCK::B(E)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(e);SBLOCK::B(E)
      • Refutation
        • P(b);
    • Try
      • B(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • K(c);S_FLIGHT,XB(E)
    • Try
      • B(E);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(e);SBLOCK::B(E)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • K(c);S_FLIGHT::QAR2(A)
      • P(b);SBLOCK::QAR2(A)
      • P(e);SBLOCK::B(E)
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