MESON Chess Problem Database

Problem Display
PID: 163067 (N3n3/1p5B/1K1p3R/N2k4/3P4/8/bQpr1r2/6B1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

stern, 1992

(First published on Thu Jul 9 1992)

N3n3/1p5B/1K1p3R/N2k4/3P4/8/bQpr1r2/6B1

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qb5#
    • 1...Rf1
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Re2
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Rg2
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Rh2
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Rf3
      • 2.Qb5#
    • 1...Rf4
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Rf6
      • 2.Qxa2#
    • 1...Rf7
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Rf8
      • 2.Qxa2#
      • 2.Qb5#
    • 1...Sf6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
  • Tries
    • 1.Rxd6+?
      • 1...Sxd6
        • 2.Sc7#
      • 1...Kxd6!
  • Keys
    • 1.Ka7!
      • threat
        • 2.Sb6#
      • 1...Rxd4
        • 2.Qb5#
      • 1...Rf5
        • 2.Qxb7#
      • 1...Rf6
        • 2.Qxa2#
      • 1...Sf6
        • 2.Sc7#
      • 1...b6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);SBLOCK,XP(C)::QAR2(B)
    • R(d);::QAR2(B)
    • R(d);::QAB(B),XB(a)
    • S(h);N_GUARD::S(H)
    • S(h);N_GUARD::S(H),XS(h)
  • Tries
    • Try
      • R(F);CHECK,XP(f)
      • Vars
        • S(h);SBLOCK,XR(F)::S(H)
      • Refutation
        • K(e);P-FLIGHT,XR(F)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • S(H)
    • Vars
      • R(c);SBLOCK,XP(C)::QAR2(B)
      • R(d);::QAB(B),XP(g)
      • R(d);::QAB(B),XB(a)
      • S(h);N_GUARD::S(H)
      • P(g);::S(H),XP(g)
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