MESON Chess Problem Database

Problem Display
PID: 89830 (8/8/4Q2K/3NpNp1/4k2b/8/3pBPb1/3r2q1 w - - 0 1)

Hasenzahl, Karl

Die Schwalbe, 1960

8/8/4Q2K/3NpNp1/4k2b/8/3pBPb1/3r2q1

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.f3#
    • 1...Bh3
      • 2.f3#
  • Tries
    • 1.f4?
      • threat
        • 2.Qxe5#
      • 1...gxf4
        • 2.Sc3#
      • 1...Qd4
        • 2.Sd6#
      • 1...Qb6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qd3#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kxf5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::P(B)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAR1(E),XP(g)
      • Vars
        • P(h);SBLOCK,XP(B)::S(C)
        • Q(b);SBLOCK::S(D)
      • Refutation
        • Q(b);P_PINQ(E)
  • Actual
    • Q(E);N_PINP(g)
    • Threat
      • QAB1(E)
    • Vars
      • K(e);S_FLIGHT,XS(C)::QAB1(E)
      • K(e);OGATEB,S_FLIGHT,XS(D)::QAB1(E)
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