MESON Chess Problem Database

Problem Display
PID: 164308 (K2R3B/8/1p2rN2/2pp4/3k1r2/3Np3/b1Q1P3/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

stern, 1998

(First published on Thu Sep 24 1998)

K2R3B/8/1p2rN2/2pp4/3k1r2/3Np3/b1Q1P3/8

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rxd5#
    • 1...Bc4
      • 2.Qb2#
    • 1...c4
      • 2.Rxd5#
    • 1...b5
      • 2.Qxc5#
  • Tries
    • 1.Qa4+?
      • 1...Kc3
        • 2.Se4#
      • 1...Bc4
        • 2.Qa1#
      • 1...c4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qb2#
      • 1...Kxe5
        • 2.Sg4#
      • 1...Rfxf6
        • 2.Sf3#
      • 1...Rxe5
        • 2.Qd3#
      • 1...Rexf6
        • 2.Sc6#
      • 1...c4
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::R1(F),XP(f)
    • B(a);SBLOCK::QAB(A)
    • P(e);S_CUTB(a)::R1(F),XP(f)
    • P(g);N_GUARD::QAB1(A),XP(e)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::B(G)+S(D),DCHECK
        • B(a);OGATE,P_SPINB(a),SBLOCK::QAB(A)
      • Refutation
        • P(e);N_SPINP(f),P_SPINP(e)
  • Actual
    • S(C);
    • Threat
      • QAB(A)
    • Vars
      • K(c);N_SPINP(f),S_FLIGHT,XS(C)::B(G)+S(D),DCHECK
      • R(d);N_GUARD,XS(D)::S(C)
      • R(h);SBLOCK,XS(C)::QAR1(A)
      • R(h);N_GUARD,XS(D)::S(C)
      • P(e);S_CUTB(a)::R1(F),XP(f)
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