MESON Chess Problem Database

Problem Display
PID: 222439 (BR6/5nQ1/2p5/4nrpK/1P3kp1/3P4/7P/4NN2 w - - 0 1)

Willis, J

Australasian (The), 1884

BR6/5nQ1/2p5/4nrpK/1P3kp1/3P4/7P/4NN2

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qxf6#
    • 1...Sxd3
      • 2.Qd4#
    • 1...Sf3
      • 2.Sg2#
    • 1...Sc4
      • 2.Qd4#
    • 1...Sg6
      • 2.Qd4#
    • 1...Sd7
      • 2.Qd4#
    • 1...g3
      • 2.hxg3#
    • 1...c5
      • 2.Sg2#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Sg2#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Sxc6!
  • Keys
    • 1.Rf8!
      • 1...Sxd3
        • 2.Qd4#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Sd6
        • 2.Qxg5#
      • 1...Sf3
        • 2.Sg2#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sg6
        • 2.Qd4#
      • 1...Sd7
        • 2.Qd4#
      • 1...Sh6
        • 2.Qxg5#
      • 1...Sd8
        • 2.Qxg5#
      • 1...Sh8
        • 2.Qxg5#
      • 1...g3
        • 2.hxg3#
      • 1...c5
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATEB::QAR2(G),XR(d)
    • S(c);OGATE,XP(D)::QAR2(G)
    • S(c);SBLOCK::S(A)
    • S(c);OGATE::QAR2(G)
    • P(b);OGATE::P(C),XP(b)
    • P(f);::S(A)
  • Tries
    • Try
      • B(H);XP(f)
      • Threat
        • S(A)
      • Vars
        • R(d);OGATEB::QAR2(G),XR(d)
      • Refutation
        • S(c);XB(H)
  • Actual
    • R(I);
    • Vars
      • S(c);OGATE,XP(D)::QAR2(G)
      • R(d);OGATEB::QAR2(G),XR(d)
      • S(g);N_GUARD,P_SPINR(d)::QAB1(G),XP(e)
      • S(c);SBLOCK::S(A)
      • S(c);OGATE::QAR2(G)
      • P(b);OGATE::P(C),XP(b)
      • P(f);::S(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).