MESON Chess Problem Database

Problem Display
PID: 96729 (2nQn3/1NP5/q5p1/1RP1k3/r1PN4/3bK3/8/8 w - - 0 1)

Stubbs, Arthur Goodwin

The Chess Problem, 1944

2nQn3/1NP5/q5p1/1RP1k3/r1PN4/3bK3/8/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.cxb6#
    • 1...Qd6
      • 2.cxd6#
    • 1...Qf6
      • 2.Qd5#
      • 2.c6#
    • 1...Qa8
      • 2.c6#
    • 1...Bf1
      • 2.Qg5#
    • 1...Be2
      • 2.Qg5#
    • 1...Bxc4
      • 2.Qg5#
    • 1...Sb6
      • 2.Qe7#
    • 1...Scd6
      • 2.Qe7#
    • 1...Sed6
      • 2.Qh8#
  • Tries
    • 1.Qe7+?
      • 1...Qe6
        • 2.Qxe6#
        • 2.c6#
      • 1...Sxe7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Qxd6
        • 2.cxd6#
      • 1...Bxc4
        • 2.Qg5#
      • 1...Scxd6
        • 2.Qe7#
      • 1...Sexd6
        • 2.Qh8#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(d);OGATE::R(D)+P(E),XQ(d)
    • Q(d);N_GUARD::R(D)+P(E)
    • B(a);N_GUARD::QAR2(H)
    • B(a);N_GUARD,XP(B)::QAR2(H)
    • S(f);N_GUARD,S_CUTQ(d)::QAR2(H)
    • S(g);OGATE::QAB(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • S(f);XQ(H)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(d);OGATE,XS(F)::R(D)+P(E),XQ(d)
      • B(a);N_GUARD,XP(B)::QAR2(H)
      • S(f);N_GUARD,XS(F)::QAR2(H)
      • S(g);OGATE,XS(F)::QAB(H)
      • S(f);N_GUARD::QAR2(H),XS(f)
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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).