MESON Chess Problem Database

Problem Display
PID: 199306 (8/8/1P1Pp2P/4k1N1/8/4N2P/1PQ4K/8 w - - 0 1)

Albregts, W

Haagsche Courant, 1897

8/8/1P1Pp2P/4k1N1/8/4N2P/1PQ4K/8

#2

9 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc3#
    • 1...Kxd6
      • 2.Qc7#
  • Tries
    • 1.Kg3?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qc3+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf4!
    • 1.Qc4?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Sg2#
      • 1...Kf6!
    • 1.Qc7?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf6
        • 2.Qg7#
      • 1...Kf4!
  • Keys
    • 1.h4!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
    • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(B)
      • K(a);S_FLIGHT::S(D)
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