MESON Chess Problem Database

Problem Display
PID: 109376 (nbr2N2/2k2pKb/P3p3/PB2P1B1/1p2pR1Q/5r2/2N1p3/2R2qn1 w - - 0 1)

Sim, Malcolm

La Presse, 1922

nbr2N2/2k2pKb/P3p3/PB2P1B1/1p2pR1Q/5r2/2N1p3/2R2qn1

#2

11 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Se3#
    • 1...Qh3
      • 2.Se3#
    • 1...Qf2
      • 2.Se3#
    • 1...Rf2
      • 2.Se1#
    • 1...Rxf4
      • 2.Se1#
    • 1...e3
      • 2.Rc4#
    • 1...f5
      • 2.Sxe6#
    • 1...f6
      • 2.Sxe6#
  • Tries
    • 1.Sxb4+?
      • 1...Rc3
        • 2.Rxc3#
      • 1...Qxc1!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qc5#
      • 1...Qxf2
        • 2.Se3#
      • 1...Rxf2
        • 2.Se1#
      • 1...Ba7
        • 2.Qxa7#
      • 1...f6
        • 2.Sxe6#
      • 1...Rc3
        • 2.Rxf7#
      • 1...Re3
        • 2.Rxf7#
      • 1...e3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD,P_PINB(H)::R(A)+S(B)
    • Q(a);N_GUARD::R(A)+S(B)
    • R(d);N_GUARD::R(A)+S(B)
    • R(d);N_GUARD,XR(C)::R(A)+S(B)
    • P(f);OGATE::R(C)
    • P(i);N_GUARD::S(K),XP(g)
  • Tries
    • Try
      • S(B);CHECK,XP(e)
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::R(A),XR(d)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • Q(a);N_GUARD,XQ(D)::R(A)+S(B)
      • R(d);N_GUARD,XQ(D)::R(A)+S(B)
      • B(l);N_GUARD::QAR2(D),XB(l)
      • P(i);N_GUARD::S(K),XP(g)
      • R(d);N_GUARD::R(C),XP(i)
      • P(f);OGATE::R(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).