MESON Chess Problem Database

Problem Display
PID: 115518 (4KQn1/n1NN2p1/1pp2pp1/1P5R/r3kpP1/p1p5/P3PB2/8 w - - 0 1)

Cook, Eugene Beauharnais

Checkmate, 1904

4KQn1/n1NN2p1/1pp2pp1/1P5R/r3kpP1/p1p5/P3PB2/8

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qxb4#
    • 1...Ra5
      • 2.Qb4#
    • 1...Ra6
      • 2.Qb4#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qd3#
        • 2.Qe6#
      • 1...Rd4
        • 2.Qxd4#
        • 2.Qe6#
      • 1...f3!
  • Keys
    • 1.Qc5!
      • 1...Sxb5
        • 2.Qxc6#
      • 1...bxc5
        • 2.Sxc5#
      • 1...cxb5
        • 2.Qd5#
      • 1...gxh5
        • 2.Qf5#
      • 1...f3
        • 2.Qe3#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ra5
        • 2.Qb4#
        • 2.Qd4#
        • 2.Qc4#
      • 1...Ra6
        • 2.Qb4#
        • 2.Qd4#
        • 2.Qc4#
      • 1...Sc8
        • 2.Qxc6#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...c2
        • 2.Qxc2#
      • 1...f5
        • 2.Qe5#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::QAR(J),XR(c)
    • R(c);N_GUARD::QAR(J)
    • S(l);N_GUARD::QAR(J)
    • S(l);N_GUARD::QAR(J),XS(l)
  • Tries
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);
  • Actual
    • Q(J);
    • Vars
      • S(j);N_GUARD,XP(E)::QAB(J),XP(g)
      • P(f);XQ(J)::S(H),XP(f)
      • P(g);N_GUARD,XP(E)::QAB1(J)
      • P(i);N_GUARD,XR(F)::QAB1(J)
      • P(e);N_GUARD::QAR1(J)
      • R(c);N_GUARD::QAR(J),XR(c)
      • R(c);N_GUARD::QAR2(J),XR(c)
      • R(c);N_GUARD::QAR1(J),XR(c)
      • S(j);N_GUARD::QAB(J),XP(g)
      • S(l);N_GUARD::QAR(J)
      • S(l);N_GUARD::QAR(J),XS(l)
      • P(b);OGATE::QAB(J),XP(b)
      • P(h);N_GUARD::QAR1(J)
      • P(i);N_GUARD::QAB1(J)
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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).