MESON Chess Problem Database

Problem Display
PID: 122234 (8/8/1Q1p3B/2nB4/1N1k2P1/3b4/8/4K3 w - - 0 1)

Scheel, Johan

Ekko, 1907

8/8/1Q1p3B/2nB4/1N1k2P1/3b4/8/4K3

#2

6 + 4

756 Norsk Sjakkblad 1919
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Bg7#
  • Tries
    • 1.Qa7?
      • threat
        • 2.Qa1#
        • 2.Qg7#
      • 1...Ke5
        • 2.Qa1#
        • 2.Qg7#
      • 1...Ba6
        • 2.Qg7#
      • 1...Kc3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qa1#
      • 1...Kc3
        • 2.Bg7#
      • 1...Ke5
        • 2.Qa1#
      • 1...Sb3
        • 2.Sc6#
      • 1...Sa4
        • 2.Sc6#
      • 1...Se4
        • 2.Sc6#
      • 1...Sa6
        • 2.Sc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sd7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINS(c),S_FLIGHT::B(F)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(E)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
  • Actual
    • Q(E);N_PINS(c)
    • Threat
      • QAB(E)
    • Vars
      • K(b);S_FLIGHT::B(F)
      • K(b);S_FLIGHT::QAB(E)
      • S(c);::S(B)
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