MESON Chess Problem Database

Problem Display
PID: 185888 (1K1N2B1/2pp1r2/4b3/1QPkp3/7R/1P1nnPN1/8/B2r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Chess, 1957

1K1N2B1/2pp1r2/4b3/1QPkp3/7R/1P1nnPN1/8/B2r4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sg2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
      • 2.bxc4#
    • 1...Sg4
      • 2.Qc4#
    • 1...Sf5
      • 2.Qc4#
    • 1...e4
      • 2.fxe4#
    • 1...d6
      • 2.Qc6#
  • Tries
    • 1.Qb7+?
      • 1...Kxc5
        • 2.Se4#
      • 1...c6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Rc1
        • 2.Qxd3#
      • 1...Rf4
        • 2.Qxd7#
      • 1...Bg4
        • 2.Sf6#
      • 1...Sf4
        • 2.c6#
      • 1...Sg4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::QAB1(F)
    • P(e);OGATE::P(C),XP(e)
    • P(h);N_GUARD::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(G)::S(D)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(b);OGATE,P_SPINS(b),XP(G)::QAR1(F),XS(b)
      • R(a);N_GUARD::QAR2(F),XS(b)
      • R(i);N_GUARD,P_SPINB(f)::QAR2(F),XP(h)
      • B(f);P_SPINR(i)::S(D)
      • S(b);N_GUARD::QAR(F)+P(G)
      • S(c);N_GUARD::QAB1(F)
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