MESON Chess Problem Database

Problem Display
PID: 57836 (Kb6/2Np4/Q7/1BpPp3/2Nk4/4R3/2p1pP2/3r4 w - - 0 1)

Hoffmann, Fritz

idee & form, 2004

Kb6/2Np4/Q7/1BpPp3/2Nk4/4R3/2p1pP2/3r4

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxa1#
    • 1...Rd2
      • 2.Qa1#
    • 1...c1S
      • 2.Qa1#
    • 1...e4
      • 2.Qf6#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...Rd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...e4
        • 2.Qxe4#
        • 2.Qf6#
        • 2.Qg7#
      • 1...Ra1+!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sb3#
        • 2.Sf3#
        • 2.Rd3#
      • 1...Rxd2
        • 2.Qa1#
      • 1...Bxc7
        • 2.Rd3#
      • 1...c4
        • 2.Qb6#
      • 1...e4
        • 2.Qf6#
      • 1...c1S
        • 2.Sf3#
        • 2.Qa1#
      • 1...e1S
        • 2.Sb3#
      • 1...Rb1
        • 2.Sf3#
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD,P_PINQ(F)::QAB(F),XR(a)
    • R(a);N_GUARD::QAB(F)
    • P(b);S_CUTR(a)::QAB(F)
    • P(f);OGATEB::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Refutation
        • R(a);CHECK
  • Actual
    • S(C);
    • Threat
      • DUALS(3)
    • Vars
      • R(a);N_GUARD,XS(C)::QAB(F)
      • B(h);XS(G)::R1(B)
      • P(e);OGATEB::QAB(F)
      • P(f);OGATEB::QAB(F)
      • P(c);::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).