MESON Chess Problem Database

Problem Display
PID: 157237 (5b2/3n1Q1N/q3p3/3Pk1pK/b2RNprn/7B/8/B7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1955

5b2/3n1Q1N/q3p3/3Pk1pK/b2RNprn/7B/8/B7

#2

8 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qxe6#
    • 1...Qe2
      • 2.Qxe6#
    • 1...Qd3
      • 2.Qxe6#
    • 1...Qc4
      • 2.Qxe6#
    • 1...Qb5
      • 2.Qxe6#
    • 1...Qb7
      • 2.Qxe6#
    • 1...Qc8
      • 2.Qxe6#
    • 1...Qa5
      • 2.Qxe6#
    • 1...Qa7
      • 2.Qxe6#
    • 1...Qa8
      • 2.Qxe6#
    • 1...Bc6
      • 2.Qxe6#
    • 1...Bd6
      • 2.Qxe6#
    • 1...Sc5
      • 2.Qf6#
    • 1...Sb6
      • 2.Qxe6#
      • 2.Qf6#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sb8
      • 2.Qf6#
    • 1...exd5
      • 2.Qxd5#
  • Tries
    • 1.Qg7+?
      • 1...Kf5
        • 2.Bxg4#
        • 2.Qxg5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Bxg7!
  • Keys
    • 1.Shf6!
      • threat
        • 2.Sxg4#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Kf5
        • 2.Sxd7#
      • 1...Qe2
        • 2.Qxe6#
      • 1...Rg1
        • 2.Rd1#
      • 1...Rg2
        • 2.Rd2#
      • 1...Rg3
        • 2.Rd3#
      • 1...Bd1
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 14
  • Sets
    • Q(g);N_GUARD::QAR1(G),XP(h)
    • B(a);S_CUTQ(g)::QAR1(G),XP(h)
    • B(j);S_CUTQ(g)::QAR1(G),XP(h)
    • S(i);N_GUARD::QAB1(G)
    • S(i);CHECK,N_GUARD::QAB1(G),XS(i)
    • P(h);OGATE,XP(E)::QAR1(G),XP(h)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);CHECK,N_GUARD,P_SPINS(i)::QAB1(G),XS(i)
      • Refutation
        • B(j);XQ(G)
  • Actual
    • S(H);
    • Threat
      • S(H),XR(c)
    • Vars
      • S(i);CHECK,OGATE,XS(H)::QAB1(G),XS(i)
      • K(e);P-FLIGHT,P_SPINR(c)::QAR(G)+S(H),XS(i)
      • Q(g);N_GUARD::QAR1(G),XP(h)
      • R(c);::B(A)+R(C)
      • B(a);N_GUARD::S(H),XS(i)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).