MESON Chess Problem Database

Problem Display
PID: 121453 (4K3/8/3pk3/1P6/7P/5P2/2BP4/Q7 w - - 0 1)

Dehler, Ernst Georg

Bohemia, 1912

4K3/8/3pk3/1P6/7P/5P2/2BP4/Q7

#2

7 + 2

6490 yacpdb 2009
15148 Sadier Collection 2014
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • 1...Kd5
        • 2.Bb3#
      • 1...d5!
    • 1.Qg7?
      • 1...d5
        • 2.Qe7#
      • 1...Kd5!
    • 1.Qe1+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Kd5!
    • 1.f4?
      • 1...d5
        • 2.Qe5#
        • 2.Qa6#
      • 1...Kd5!
  • Keys
    • 1.d4!
      • 1...Kd5
        • 2.Bb3#
      • 1...Kf6
        • 2.d5#
      • 1...d5
        • 2.Qa6#

Anticipated by 184769(1908)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::B(B)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(D);
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(C);
    • Vars
      • K(b);S_FLIGHT::B(B)
      • K(b);P-FLIGHT::QAB(A)+P(C)
      • P(a);OGATEB,SBLOCK::QAR(A)
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