MESON Chess Problem Database

Problem Display
PID: 261935 (3b4/8/8/8/7k/5Q1p/3B4/5K2 w - - 0 1)

Jonsson, Nils Gustav Helmer

Problemnoter, 1965

3b4/8/8/8/7k/5Q1p/3B4/5K2

#2

3 + 3

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Be1#
  • Tries
    • 1.Qe4+?
      • 1...Kg3
        • 2.Qf4#
      • 1...Kh5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Be1#
      • 1...Kg3
        • 2.Qf4#
      • 1...Bg5
        • 2.Qxg5#
      • 1...Ba5
        • 2.Qg5#
      • 1...Bb6
        • 2.Qg5#
      • 1...Bc7
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::B(B)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • B(B)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB1(C)
      • B(c);N_GUARD::QAB1(C),XB(c)
      • B(c);N_GUARD::QAB1(C)
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