MESON Chess Problem Database

Problem Display
PID: 163072 (3RbB2/8/3N2p1/3Nb1Q1/2Pk1p2/2R5/P5B1/1nK5 w - - 0 1)

Petkov, Petko Andonov

stern, 1992

(First published on Thu Nov 12 1992)

3RbB2/8/3N2p1/3Nb1Q1/2Pk1p2/2R5/P5B1/1nK5

#2

10 + 6

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Sxb5#
    • 1...Bf7
      • 2.Sb5#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sb5#
      • 1...Kxc3
        • 2.Se4#
      • 1...Kc5
        • 2.Sc8#
      • 1...Bxd6
        • 2.Bg7#
      • 1...Sxc3
        • 2.Sdf5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...f3!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sb5#
      • 1...Kxc3
        • 2.Se4#
      • 1...Kc5
        • 2.Sdc8#
      • 1...Bxd6
        • 2.Bg7#
      • 1...Sxc3
        • 2.Sf5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...f3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD::S(H),XB(f)
    • B(f);N_GUARD::S(H)
    • P(c);OGATE::QAB1(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • R(I)+S(H),DCHECK
      • Vars
        • K(b);S_FLIGHT,XR(D)::S(H)
        • K(b);P_SPINB(d),S_FLIGHT::B(J)+S(H)
        • B(d);OGATEB,P_SPINB(d),XS(H)::B(J)
        • S(a);SBLOCK,XR(D)::R(I)+S(H),DCHECK
        • B(f);::R(I)+S(H),DCHECK,XB(f)
      • Refutation
        • P(c);
  • Actual
    • S(F);
    • Threat
      • R(I)+S(H),DCHECK
    • Vars
      • K(b);S_FLIGHT,XR(D)::S(H)
      • K(b);P_SPINB(d),S_FLIGHT::B(J)+S(H)
      • B(d);OGATEB,P_SPINB(d),XS(H)::B(J)
      • S(a);SBLOCK,XR(D)::R(I)+S(H),DCHECK
      • B(f);::R(I)+S(H),DCHECK,XB(f)
      • P(c);OGATE::QAB1(G)
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