MESON Chess Problem Database

Problem Display
PID: 207088 (5B2/2p1r1p1/2Pk4/2N1n3/1P3Q2/3P4/b3K3/b1R4B w - - 0 1)

Busack, Otto

Deutsche Schachblatter, 1950

5B2/2p1r1p1/2Pk4/2N1n3/1P3Q2/3P4/b3K3/b1R4B

#2

9 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Sb7#
  • Tries
    • 1.Qd4+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bxd4!
    • 1.Qf6+?
      • 1...Be6
        • 2.Sb7#
        • 2.Bxe7#
        • 2.Qxe7#
        • 2.Qxe6#
      • 1...gxf6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sb7#
      • 1...Sxd3+
        • 2.Se4#
      • 1...Sf3+
        • 2.Se4#
      • 1...Sc4+
        • 2.Qe6#
      • 1...Sg4+
        • 2.Se4#
      • 1...Sxc6+
        • 2.Se4#
      • 1...Sg6+
        • 2.Se4#
      • 1...Sd7+
        • 2.Se4#
      • 1...Sf7+
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK::S(G)
  • Tries
    • Try
      • Q(F);CHECK,N_PINS(c)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(F),XB(b)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);CHECK,N_PINS(c)
      • Refutation
        • P(g);XQ(F)
  • Actual
    • Q(F);N_PINS(c)
    • Threat
      • S(G)
    • Vars
      • S(c);CHECK,XP(D)::S(G)
      • S(c);CHECK::S(G)
      • S(c);CHECK,S_CUTB(b)::QAR1(F)
      • S(c);CHECK,XP(H)::S(G)
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