MESON Chess Problem Database

Problem Display
PID: 78907 (2n5/QprN4/8/n1p5/k7/p1K5/P7/5B2 w - - 0 1)

Lange, Hans Franz

Die Schwalbe, 1936

2n5/QprN4/8/n1p5/k7/p1K5/P7/5B2

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sd6
      • 2.Sb6#
    • 1...Sxa7
      • 2.Sb6#
    • 1...Se7
      • 2.Sb6#
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Bb5#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Sb3
        • 2.axb3#
      • 1...Sc4
        • 2.Qb4#
      • 1...Sc6
        • 2.Qb5#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sa7
        • 2.Sb6#
      • 1...b5
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::S(E),XS(g)
    • S(g);N_GUARD::S(E)
    • S(g);N_GUARD,N_SPINS(c),XQ(D)::S(E)
  • Actual
    • Q(D);N_PINS(c),P_SPINQ(D),XP(d)
    • Threat
      • B(A)
    • Vars
      • R(f);CHECK,XQ(D)::S(E),XR(f)
      • S(c);OGATE::P(B),XS(c)
      • S(c);N_PINQ(D)::QAR1(D)
      • S(c);N_PINQ(D)::QAB1(D)
      • S(g);N_GUARD::S(E)
      • P(e);::B(A),XP(e)
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