MESON Chess Problem Database

Problem Display
PID: 15158 (B5QK/1rp1B1pp/1p3p1r/4k3/1NR3nR/1Nn3Pb/5P2/1q6 w - - 0 1)

Keller, Michael

1st Prize, Schakend Nederland, 1980

B5QK/1rp1B1pp/1p3p1r/4k3/1NR3nR/1Nn3Pb/5P2/1q6

#2

10 + 12

3752 FIDE Album (1980-1982) 1988
4655 Michael Keller Ein Meister der Schachkomposition 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Sc6#
    • 1...Sd1
      • 2.Qd5#
    • 1...Sa2
      • 2.Qd5#
    • 1...Se2
      • 2.Qd5#
    • 1...Sa4
      • 2.Qd5#
    • 1...Se4
      • 2.Qd5#
    • 1...Sb5
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...f5
      • 2.f4#
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qe6#
      • 1...Sxf2
        • 2.Sbc6#
      • 1...Qf5
        • 2.Sdc6#
      • 1...Rb8
        • 2.f4#
      • 1...Sh2
        • 2.Sbc6#
      • 1...Se3
        • 2.Sbc6#
      • 1...f5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(a);SBLOCK::S(D)
    • S(b);N_GUARD::QAR1(I)
    • S(b);N_GUARD::QAR1(I),XS(b)
    • P(g);SBLOCK::P(A)
  • Actual
    • S(B);
    • Threat
      • QAR1(I)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(i),P_SPINS(d)::QAR2(I)
      • S(d);XP(A)::S(D)
      • Q(a);SBLOCK::S(B)
      • R(i);P_PINQ(I)::P(A)
      • S(d);::S(D)
      • P(g);SBLOCK::S(B)
HTML5 logo

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).