MESON Chess Problem Database

Problem Display
PID: 256517 (8/1Q6/1p1k2K1/5P2/n2bR1p1/3rp3/1p1N1B2/2q5 w - - 0 1)

Obert, Karl

Wiener Schachzeitung, 1887

8/1Q6/1p1k2K1/5P2/n2bR1p1/3rp3/1p1N1B2/2q5

#2

6 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Re6#
    • 1...Bc5
      • 2.Bg3#
      • 2.Re6#
  • Tries
    • 1.Rxd4+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qg7#
      • 1...Rxd4!
  • Keys
    • 1.Re5!
      • threat
        • 2.Rd5#
      • 1...Kxe5
        • 2.Bg3#
      • 1...Bxe5
        • 2.Se4#
      • 1...Qc7
        • 2.Qd5#
      • 1...Qh1
        • 2.Sc4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qc5
        • 2.Re6#
      • 1...Qc6
        • 2.Qe7#
      • 1...Bc3
        • 2.Sc4#
      • 1...Bc5
        • 2.Re6#
      • 1...Sc3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::R1(C)
  • Tries
    • Try
      • R(C);CHECK,XB(f)
      • Vars
        • K(i);N_GUARD,S_FLIGHT::QAR1(F)
      • Refutation
        • R(c);XR(C)
  • Actual
    • R(C);
    • Threat
      • R1(C)
    • Vars
      • K(i);OGATEB,S_FLIGHT,XR(C)::B(B)
      • B(f);SBLOCK,XR(C)::S(A)
      • Q(a);SBLOCK::QAR1(F)
      • Q(a);N_GUARD::S(A)
      • Q(a);N_GUARD::S(A),XQ(a)
      • Q(a);SBLOCK::R1(C)
      • Q(a);SBLOCK::QAB1(F)
      • B(f);S_CUTQ(a)::S(A)
      • B(f);SBLOCK::R1(C)
      • S(e);S_CUTQ(a)::S(A)
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