MESON Chess Problem Database

Problem Display
PID: 267166 (Kn5b/pn1N4/4pNr1/1pP1p2B/1qk5/P1P4Q/2P5/3R1b2 w - - 0 1)

Keller, Michael

Schakend Nederland, 1979

Kn5b/pn1N4/4pNr1/1pP1p2B/1qk5/P1P4Q/2P5/3R1b2

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Qxe6#
    • 1...Be2
      • 2.Bxe2#
    • 1...Bg2
      • 2.Be2#
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Sxc5
      • 2.Sxe5#
    • 1...e4
      • 2.Rd4#
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxf1#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...Bxh3
        • 2.Be2#
      • 1...Sxc5
        • 2.Sd6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Rg1
        • 2.Qxe6#
      • 1...Rg2
        • 2.Qxe6#
      • 1...Rg3
        • 2.Qxe6#
      • 1...Rf6
        • 2.Sxe5#
      • 1...Be2
        • 2.Bxe2#
      • 1...Bg2
        • 2.Be2#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK,XP(D)::QAB(E),XP(f)
    • B(a);N_GUARD::B(G),XB(a)
    • B(a);N_GUARD::QAB1(E),XB(a)
    • S(i);SBLOCK,XP(F)::S(I),XP(e)
    • P(e);N_GUARD::R1(A)
  • Actual
    • S(H);
    • Threat
      • QAB(E),XB(a)
    • Vars
      • Q(b);OGATE,XP(D)::QAR1(E),XQ(b)
      • B(a);N_GUARD,XQ(E)::B(G)
      • S(i);N_GUARD,XP(F)::S(H)
      • B(a);N_GUARD::QAB1(E),XB(a)
      • R(g);N_GUARD::QAB(E),XP(f)
      • R(g);S_CUTB(k)::S(I),XP(e)
      • B(a);N_GUARD::B(G),XB(a)
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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).