MESON Chess Problem Database

Problem Display
PID: 193874 (1n1qbr2/1PpkbpN1/R7/2P3Qp/1N5K/8/3B2B1/3R4 w - - 0 1)

Marble, Murray

White, Alain Campbell

Pittsburgh Gazette-Times, 1916

1n1qbr2/1PpkbpN1/R7/2P3Qp/1N5K/8/3B2B1/3R4

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg5+
      • 2.Bxg5#
    • 1...Sxa6
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
    • 1...f6
      • 2.Qf5#
  • Tries
    • 1.c6+?
      • 1...Kd6
        • 2.Bc1#
        • 2.Be1#
        • 2.Bc3#
        • 2.Be3#
        • 2.Bf4#
      • 1...Sxc6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se5#
      • 1...Bxg5+
        • 2.Bxg5#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Qc8
        • 2.Qxe7#
      • 1...Bd6
        • 2.Qxd8#
      • 1...Bf6
        • 2.Bh3#
      • 1...f6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);CHECK,OGATE,XQ(G)::R(A)+B(B),XB(d)
    • S(f);N_GUARD,XR(H)::B(C)
    • S(f);N_GUARD::B(C),XS(f)
    • P(e);N_PINQ(G)::QAB(G)
  • Tries
    • Try
      • P(F);CHECK
      • Refutation
        • S(f);XP(F)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(d);CHECK,OGATE,XQ(G)::R(A)+B(B),XB(d)
      • S(f);OGATE,XS(D)::B(C),XS(f)
      • Q(g);N_GUARD::QAR1(G),XB(d)
      • B(d);::QAR1(G),XQ(g)
      • B(d);S_CUTP(e)::B(C)
      • P(e);N_PINQ(G)::QAB(G)
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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).