MESON Chess Problem Database

Problem Display
PID: 157321 (8/1K1p4/1n1N4/1p1k3n/4N1B1/2Bpp3/6Q1/8 w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1942

8/1K1p4/1n1N4/1p1k3n/4N1B1/2Bpp3/6Q1/8

#2

6 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qa2#
    • 1...Sa8
      • 2.Qa2#
    • 1...Sc8
      • 2.Qa2#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qxd3#
        • 2.Qf5#
        • 2.Qf7#
      • 1...Sg3
        • 2.Qxd3#
        • 2.Qf7#
      • 1...Sf6
        • 2.Qxd3#
        • 2.Qf5#
      • 1...Sg7
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxd3#
        • 2.Qf7#
      • 1...d2
        • 2.Qd3#
        • 2.Qxb5#
        • 2.Qf5#
        • 2.Qf7#
      • 1...e2
        • 2.Qf5#
        • 2.Qf7#
      • 1...Sf4!
    • 1.Qb2?
      • threat
        • 2.Qxb5#
      • 1...Sa4
        • 2.Qa2#
        • 2.Qb3#
      • 1...b4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sxe3#
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke6
        • 2.Sg5#
      • 1...Sc4
        • 2.Se7#
      • 1...e2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(e);::QAR2(A),XP(a)
      • Refutation
        • S(e);
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(c)
      • Refutation
        • P(c);
  • Actual
    • S(E);
    • Threat
      • S(E),XP(b)
    • Vars
      • K(d);S_FLIGHT::QAB(A)
      • K(d);S_FLIGHT::S(C)
      • S(f);SBLOCK::S(E)
      • P(b);::S(E)
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