MESON Chess Problem Database

Problem Display
PID: 239174 (6R1/2pkp3/8/3P4/2N3K1/8/6Q1/8 w - - 0 1)

Hermanson, Halvar

Sachove umeni (Ceskoslovensky sach), 1962

6R1/2pkp3/8/3P4/2N3K1/8/6Q1/8

#2

5 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2?
      • 1...c5
        • 2.Qb7#
      • 1...c6
        • 2.Qb7#
      • 1...e6
        • 2.Qg7#
      • 1...e5!
    • 1.Qf2?
      • 1...c6
        • 2.Qa7#
      • 1...e5
        • 2.Qf7#
      • 1...e6
        • 2.Qf7#
      • 1...c5!
  • Keys
    • 1.Qh2!
      • 1...e5
        • 2.Qh7#
      • 1...e6
        • 2.Qh7#
      • 1...c5
        • 2.Sb6#
      • 1...c6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR2(A)
        • P(c);OGATEB::QAR(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR(A)
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • P(c);OGATEB::QAR(A)
      • P(a);N_GUARD::S(B)
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