MESON Chess Problem Database

Problem Display
PID: 232825 (5Q2/8/2p3rN/2P1p2b/2Kpk2n/4Pp2/1B3P2/7N w - - 0 1)

Koller, Paul

Freie Presse, 1972

5Q2/8/2p3rN/2P1p2b/2Kpk2n/4Pp2/1B3P2/7N

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rd6
      • 2.Sg3#
    • 1...Re6
      • 2.Sg3#
    • 1...Rf6
      • 2.Sg3#
    • 1...Rxh6
      • 2.Sg3#
    • 1...Bg4
      • 2.Sg3#
    • 1...Sg2
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
  • Keys
    • 1.Qf6!
      • 1...Rxf6
        • 2.Sg3#
      • 1...Rxh6
        • 2.Sg3#
      • 1...dxe3
        • 2.Qxe5#
      • 1...Rg1
        • 2.Qxc6#
      • 1...Rg2
        • 2.Qxc6#
      • 1...Rg3
        • 2.Sxg3#
        • 2.Qxc6#
      • 1...Rg4
        • 2.Qxc6#
      • 1...Rg5
        • 2.Qxc6#
      • 1...Rg7
        • 2.Qxc6#
      • 1...Rg8
        • 2.Qxc6#
      • 1...Bg4
        • 2.Sg3#
      • 1...Sg2
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...d3
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(h);N_GUARD::S(A),XR(h)
    • R(h);N_GUARD::S(A)
    • R(h);N_GUARD,XS(G)::S(A)
    • B(f);S_CUTR(h)::S(A)
    • S(d);N_GUARD::QAB1(H)
    • S(d);N_GUARD::QAB1(H),XS(d)
  • Actual
    • Q(H);
    • Vars
      • R(h);N_GUARD,XQ(H)::S(A)
      • R(h);N_GUARD,XS(G)::S(A)
      • P(b);XP(D)::QAR1(H),XP(e)
      • R(h);N_GUARD::QAB(H),XP(g)
      • B(f);S_CUTR(h)::S(A)
      • S(d);N_GUARD::QAB1(H)
      • S(d);N_GUARD::QAB1(H),XS(d)
      • P(b);::QAR1(H),XP(e)
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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).