MESON Chess Problem Database

Problem Display
PID: 101250 (b7/3p2rp/1N1P1k1B/3pn1NP/2p2P2/3p1Q1B/6K1/8 w - - 0 1)

Stubbs, Arthur Goodwin

Good Companions, 1921

b7/3p2rp/1N1P1k1B/3pn1NP/2p2P2/3p1Q1B/6K1/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg5+
      • 2.fxg5#
    • 1...Sc6
      • 2.Sxd5#
    • 1...Sf7
      • 2.Sxd7#
  • Keys
    • 1.Qxd5!
      • threat
        • 2.fxe5#
      • 1...Rxg5+
        • 2.fxg5#
      • 1...Bxd5+
        • 2.Sxd5#
      • 1...Re7
        • 2.Se4#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sg4
        • 2.Se4#
      • 1...Sc6
        • 2.Qf5#
      • 1...Sg6
        • 2.Se4#
      • 1...Sf7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(g);CHECK,OGATE,XS(E)::QAR(B)+P(D)DCHECK,XR(g)
    • S(d);S_CUTB(i)::S(G),XP(c)
    • S(d);N_GUARD,S_CUTR(g)::S(G),XP(f)
  • Actual
    • Q(B);P_SPINQ(B),XP(c)
    • Threat
      • P(D),XS(d)
    • Vars
      • R(g);CHECK,OGATE,XS(E)::P(D),XR(g)
      • B(i);CHECK,XQ(B)::S(G),XB(i)
      • R(g);N_PINS(E)::S(E)
      • S(d);N_PINQ(B)::QAR1(B)
      • S(d);N_PINS(E)::S(E)
      • S(d);N_GUARD,S_CUTR(g)::S(G),XP(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).