MESON Chess Problem Database

Problem Display
PID: 164217 (B6n/2KPp3/4P1n1/R1NNkpP1/8/3p2r1/5B1Q/3r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

stern, 1997

(First published on Thu Nov 20 1997)

B6n/2KPp3/4P1n1/R1NNkpP1/8/3p2r1/5B1Q/3r4

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxh8#
    • 1...Sf8
      • 2.Qxh8#
  • Tries
    • 1.Sxd3+?
      • 1...Ke4
        • 2.S5b4#
        • 2.S5f4#
      • 1...Kxe6
        • 2.d8S#
      • 1...Rxd3!
    • 1.Qxg3+?
      • 1...Sf4
        • 2.Qxf4#
        • 2.Qe3#
      • 1...f4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Scxd3#
      • 1...Kxf4
        • 2.Qxg3#
      • 1...Rxg5
        • 2.Se4#
      • 1...Sxf4
        • 2.Qxh8#
      • 1...Rc1
        • 2.Sxd3#
      • 1...Re3
        • 2.Sb3#
      • 1...d2
        • 2.Sfd3#
        • 2.Scd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,N_SPINR(c)::QAB(B),XS(h)
    • S(f);N_GUARD::QAB(B),XS(h)
  • Tries
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(d);N_SPINR(c),P-FLIGHT,XP(G)::P=S
      • Refutation
        • R(a);XS(D)
    • Try
      • Q(B);CHECK,XR(c)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(E);N_PINR(c)
    • Threat
      • R(C)+S(D),DCHECK,XP(b)
    • Vars
      • K(d);OGATEB,P_SPINR(c),S_FLIGHT,XS(E)::QAB1(B),XR(c)
      • R(c);XP(F)::R(C)+S(D)
      • S(f);N_GUARD,SBLOCK,XS(E)::QAB(B),XS(h)
      • R(a);N_GUARD,P_PINS(D)::S(E),XP(b)
      • R(c);::R(C)+S(D)
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