MESON Chess Problem Database

Problem Display
PID: 187682 (Q7/8/5p2/2P1kp2/7K/8/2NP4/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1909

Q7/8/5p2/2P1kp2/7K/8/2NP4/8

#2

5 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Se3?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke6
        • 2.Qe8#
      • 1...f4
        • 2.Qd5#
      • 1...Kf4!
    • 1.Qe8+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd5!
  • Keys
    • 1.Sb4!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Sd3#
      • 1...Ke6
        • 2.Qe8#
      • 1...f4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);SBLOCK::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::S(A)
      • K(a);P-FLIGHT::QAR2(E)
      • P(b);SBLOCK::QAR1(E)
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