MESON Chess Problem Database

Problem Display
PID: 82073 (1Qb2n1K/1q2p3/1p4p1/n5N1/3k1Np1/BR5p/2PP4/b4B2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Frankenthal Chess Club, 1957

1Qb2n1K/1q2p3/1p4p1/n5N1/3k1Np1/BR5p/2PP4/b4B2

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Rd3#
  • Tries
    • 1.Re3?
      • threat
        • 2.Qe5#
      • 1...Qxb8
        • 2.Re4#
      • 1...Qe4
        • 2.Rxe4#
      • 1...Qc7
        • 2.Re4#
      • 1...Sc4
        • 2.Rd3#
      • 1...Sc6
        • 2.Re4#
      • 1...Sd7
        • 2.Sge6#
      • 1...e5
        • 2.Qxe5#
      • 1...Qd5!
    • 1.Rb4+?
      • 1...Sc4
        • 2.Rxc4#
      • 1...Kc5+!
    • 1.Qd6+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...exd6!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qe5#
      • 1...Qxb8
        • 2.Rd5#
      • 1...Qe4
        • 2.Qxb6#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qc7
        • 2.Rd5#
      • 1...Sc4
        • 2.Se2#
      • 1...Sc6
        • 2.Rd5#
      • 1...Sd7
        • 2.Sfe6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(e);SBLOCK::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(H)
      • Vars
        • Q(h);N_GUARD,XQ(H)::R1(E)
        • Q(h);N_GUARD::R1(E),XQ(h)
        • Q(h);N_GUARD::R1(E)
        • S(e);SBLOCK::R1(E)
        • S(e);S_CUTQ(h)::R1(E)
        • S(k);N_GUARD,S_CUTB(j)::S(G)
        • P(i);::QAB1(H),XP(i)
      • Refutation
        • Q(h);
    • Try
      • R(E);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R1(E),XS(e)
      • Refutation
        • K(c);CHECK,S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(H),XQ(h)
      • Refutation
        • P(i);XQ(H)
  • Actual
    • R(E);
    • Threat
      • QAB1(H)
    • Vars
      • Q(h);N_GUARD,XQ(H)::R1(E)
      • Q(h);OGATE::QAB(H),XP(f)
      • Q(h);N_GUARD::R1(E),XQ(h)
      • Q(h);N_GUARD::R1(E)
      • S(e);SBLOCK::S(F)
      • S(e);S_CUTQ(h)::R1(E)
      • S(k);N_GUARD,S_CUTB(j)::S(F)
      • P(i);::QAB1(H),XP(i)
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