MESON Chess Problem Database

Problem Display
PID: 101090 (6Q1/1q6/p4NP1/2p5/4p2b/1P2k1rN/K1R1P3/B7 w - - 0 1)

Marshall, Burney Means

Good Companions, 1921

6Q1/1q6/p4NP1/2p5/4p2b/1P2k1rN/K1R1P3/B7

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qc8
      • 2.Sd5#
    • 1...Qxb3+
      • 2.Qxb3#
    • 1...Qb4
      • 2.Sd5#
    • 1...Qb5
      • 2.Sd5#
    • 1...Qb6
      • 2.Sd5#
    • 1...Qa7
      • 2.Sd5#
    • 1...Qc7
      • 2.Sd5#
    • 1...Qe7
      • 2.Sd5#
    • 1...Qg7
      • 2.Sd5#
    • 1...Qh7
      • 2.Sd5#
    • 1...Qb8
      • 2.Sd5#
    • 1...Rf3
      • 2.Sg4#
    • 1...Rg4
      • 2.Sxg4#
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qf4#
      • 1...Qxb3+
        • 2.Qxb3#
      • 1...Qxb8
        • 2.Sd5#
      • 1...Rxh3
        • 2.Sg4#
      • 1...Qc7
        • 2.Sd5#
      • 1...Rf3
        • 2.Sg4#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Bg5
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(g);N_GUARD,P_PINP(E)::S(G),XQ(g)
    • Q(g);N_GUARD::S(G)
    • Q(g);CHECK,OGATE,XP(E)::QAR(I),XQ(g)
    • R(b);N_GUARD::S(G)
    • R(b);N_GUARD::S(G),XR(b)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • Q(g);CHECK,OGATE,XP(E)::QAR(I),XQ(g)
      • Q(g);N_GUARD,XQ(I)::S(G)
      • R(b);N_GUARD,XS(F)::S(G)
      • Q(g);N_GUARD::S(G)
      • R(b);N_GUARD::S(G)
      • R(b);N_GUARD::S(G),XR(b)
      • B(d);N_GUARD::QAR2(I),XR(b)
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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).