MESON Chess Problem Database

Problem Display
PID: 74797 (8/B2p1R2/r2p3p/pN1n2b1/4k1P1/1Q3NP1/pn6/1b3B1K w - - 0 1)

Ahues, Herbert Siegfried Oskar

Der Tagesspiegel (Berlin), 1994

8/B2p1R2/r2p3p/pN1n2b1/4k1P1/1Q3NP1/pn6/1b3B1K

#2

9 + 11

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa7
      • 2.Sxd6#
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Se3
      • 2.Sc3#
    • 1...Sb4
      • 2.Sc3#
    • 1...Sb6
      • 2.Sxd6#
    • 1...Sf6
      • 2.Re7#
    • 1...Sc7
      • 2.Sc3#
    • 1...Se7
      • 2.Sc3#
  • Tries
    • 1.Sxg5+?
      • 1...Ke5
        • 2.Bd4#
      • 1...hxg5!
    • 1.Bd3+?
      • 1...Sxd3
        • 2.Qc4#
      • 1...Bxd3!
    • 1.Rf5?
      • threat
        • 2.Qxd5#
      • 1...Rxa7
        • 2.Sxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sd2#
        • 2.Sc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sf4
        • 2.Sd2#
        • 2.Qe3#
      • 1...Sb6
        • 2.Sxd6#
      • 1...Sf6
        • 2.Sc3#
      • 1...Sc7
        • 2.Sc3#
      • 1...Se7
        • 2.Sc3#
      • 1...Rb6!
    • 1.Qc2+?
      • 1...Sd3
        • 2.Bxd3#
        • 2.Qc4#
      • 1...Bxc2!
    • 1.Qa4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sxa4!
    • 1.Qe3+?
      • 1...Sxe3
        • 2.Sc3#
      • 1...Bxe3!
    • 1.Qb4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxb4
        • 2.Sc3#
      • 1...axb4!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Bxd5#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sb6
        • 2.Sxd6#
      • 1...Sf6
        • 2.Re7#
      • 1...Sc7
        • 2.Sc3#
      • 1...Se7
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD,XB(H)::S(G),XP(i)
    • S(c);N_GUARD::QAR2(C)
    • S(c);N_GUARD::QAR2(C),XS(c)
    • S(f);N_GUARD::S(G),XS(f)
    • S(f);N_GUARD::S(G)
    • S(f);S_CUTR(h)::S(G),XP(i)
    • S(f);N_GUARD,S_CUTB(g)::R(I)
  • Tries
    • Try
      • S(D);CHECK,XB(g)
      • Vars
        • K(d);P-FLIGHT::B(H)
      • Refutation
        • P(j);XS(D)
    • Try
      • B(A);CHECK
      • Vars
        • S(c);XB(A)::QAR2(C)
      • Refutation
        • B(a);XB(A)
    • Try
      • R(I);
      • Threat
        • QAB1(C),XS(f)
      • Vars
        • R(h);N_GUARD,XB(H)::S(G),XP(i)
        • S(c);N_GUARD::QAR2(C),XS(c)
        • S(f);N_GUARD::S(G),XS(f)
        • S(f);N_GUARD::S(G)
        • S(f);S_CUTR(h)::S(G),XP(i)
      • Refutation
        • R(h);
    • Try
      • Q(C);CHECK
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(C),XS(c)
        • S(f);P_SPINS(f)::S(G)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(f);XQ(C)::S(G)
      • Refutation
        • B(g);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(C),XS(c)
        • S(f);XQ(C)::S(G)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • B(A);
    • Threat
      • B(A),XS(f)
    • Vars
      • S(c);OGATE,XB(A)::QAR2(C),XS(c)
      • S(f);N_GUARD::S(G),XS(f)
      • S(f);N_GUARD::S(G)
      • S(f);N_GUARD,S_CUTB(g)::QAR1(C)
      • S(f);S_CUTR(h)::S(G),XP(i)
      • S(f);N_GUARD,S_CUTB(g)::R(I)
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