MESON Chess Problem Database

Problem Display
PID: 157771 (3Q4/6p1/1N2Kp1b/3p4/1P1kNR2/1bpp4/5P2/2q2nr1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1956

3Q4/6p1/1N2Kp1b/3p4/1P1kNR2/1bpp4/5P2/2q2nr1

#2

7 + 11

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sg5#
    • 1...Qa3
      • 2.Sg5#
    • 1...Qa1
      • 2.Sg5#
    • 1...Qb1
      • 2.Sg5#
    • 1...Qd1
      • 2.Sg5#
    • 1...Qc2
      • 2.Sg5#
    • 1...Rg5
      • 2.Sd2#
    • 1...Bd1
      • 2.Qxd5#
    • 1...Bc2
      • 2.Qxd5#
    • 1...Ba4
      • 2.Qxd5#
    • 1...Se3
      • 2.Sg5#
    • 1...g5
      • 2.Qxf6#
    • 1...g6
      • 2.Qxf6#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Sd6#
      • 1...Bxc4
        • 2.Qb6#
      • 1...Rg5
        • 2.Sed2#
      • 1...Se3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(a);N_GUARD::R(D)+S(C)
    • R(c);S_CUTB(j)::R(D)+S(C)
    • B(d);N_GUARD::QAR1(G),XP(h)
    • S(b);S_CUTQ(a)::R(D)+S(C)
    • P(k);N_GUARD::QAB(G),XP(i)
  • Actual
    • S(E);
    • Threat
      • QAR1(G),XP(h)
    • Vars
      • K(g);N_SPINP(h),P-FLIGHT,XS(E)::R(D)+S(C),DCHECK
      • B(d);SBLOCK,XS(E)::QAB(G)
      • R(c);S_CUTB(j)::R(D)+S(C)
      • S(b);S_CUTQ(a)::R(D)+S(C)
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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).