MESON Chess Problem Database

Problem Display
PID: 158085 (3R4/1N1K1p1b/Qp4p1/2Pk4/7b/p4P2/qBP5/1N1r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Europe Echecs, 1960

3R4/1N1K1p1b/Qp4p1/2Pk4/7b/p4P2/qBP5/1N1r4

#2

9 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.c4#
    • 1...Qa1
      • 2.c4#
    • 1...Rxb1
      • 2.Qd3#
    • 1...Rc1
      • 2.Qd3#
    • 1...Re1
      • 2.Qd3#
    • 1...Rf1
      • 2.Qd3#
    • 1...Rg1
      • 2.Qd3#
    • 1...Rh1
      • 2.Qd3#
    • 1...Rd3
      • 2.Qxd3#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qe4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Qc4
        • 2.Qc6#
      • 1...Re1
        • 2.Qd4#
      • 1...g5
        • 2.Ke7#
      • 1...f5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe4#
      • 1...Qc4
        • 2.Qe5#
      • 1...Re1
        • 2.Qd3#
      • 1...Rd4
        • 2.Sc3#
      • 1...g5
        • 2.Kc7#
      • 1...f5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD,XS(A)::P(C)
    • Q(b);N_GUARD::P(C)
    • R(a);N_GUARD,XS(A)::QAR2(F)
    • R(a);N_GUARD::QAR2(F)
    • R(a);N_GUARD::QAR2(F),XR(a)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • R(a);N_GUARD::QAR1(F),XR(a)
        • Q(b);SBLOCK::QAB1(F)
        • R(a);N_GUARD::QAR1(F)
        • P(g);::R(I)+K(H)
      • Refutation
        • P(h);
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • Q(b);SBLOCK::QAR1(F)
      • R(a);N_GUARD::QAR2(F)
      • R(a);SBLOCK::S(A)
      • P(g);S_CUTB(d)::R(I)+K(H)
      • P(h);N_GUARD::QAB1(F)
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