MESON Chess Problem Database

Problem Display
PID: 185839 (8/8/2K4p/p1QNp3/Rbn1k1P1/nN5r/2r1PB2/1B6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Chess, 1957

8/8/2K4p/p1QNp3/Rbn1k1P1/nN5r/2r1PB2/1B6

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Sxd2#
    • 1...Bxc5
      • 2.Sd2#
      • 2.Sxc5#
    • 1...Sb2
      • 2.Sd2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Se3
      • 2.Sd2#
    • 1...Sb6
      • 2.Sd2#
    • 1...Sd6
      • 2.Sd2#
  • Tries
    • 1.Bxc2+?
      • 1...Rd3
        • 2.Bxd3#
      • 1...Sxc2!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf5#
      • 1...Sb2+
        • 2.Sc5#
      • 1...Sd2+
        • 2.Sc5#
      • 1...Se3+
        • 2.Sc3#
      • 1...Sb6+
        • 2.Sc5#
      • 1...Sd6+
        • 2.Sc5#
      • 1...Bxf8
        • 2.Sd2#
      • 1...Rf3
        • 2.Qxf3#
      • 1...Rh5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD,P_SPINS(e)::S(D),XB(d)
    • S(e);N_GUARD,P_PINQ(G),P_SPINB(d)::S(D)
    • S(e);N_GUARD,P_PINQ(G),P_SPINB(d)::S(D),XS(e)
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::B(A),XR(c)
      • Refutation
        • S(b);XB(A)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(e);CHECK,P_SPINB(d)::S(D)
      • S(e);CHECK,P_SPINB(d),S_CUTR(c)::S(H)
      • B(d);N_GUARD,P_SPINS(e),XQ(G)::S(D)
      • R(c);N_GUARD::QAB1(G),XR(c)
      • R(c);N_GUARD::QAB1(G)
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