MESON Chess Problem Database

Problem Display
PID: 181170 (n2Q3K/8/4p3/2p1k1pN/R2b2nR/8/2B2P2/8 w - - 0 1)

Prideaux, Henry Maxwell

San Francisco Chronicle, 1904

n2Q3K/8/4p3/2p1k1pN/R2b2nR/8/2B2P2/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...gxh4
      • 2.f4#
  • Tries
    • 1.Ra6?
      • threat
        • 2.Qxg5#
        • 2.Qd6#
      • 1...Bxf2
        • 2.Qd6#
      • 1...gxh4
        • 2.Qg5#
        • 2.Qd6#
        • 2.f4#
      • 1...Sf6
        • 2.Qd6#
      • 1...Ba1
        • 2.Qd6#
      • 1...Bb2
        • 2.Qd6#
      • 1...Bc3
        • 2.Qd6#
      • 1...Be3
        • 2.Qd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sb6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sg6#
      • 1...Kxf4+
        • 2.Qf6#
      • 1...gxf4
        • 2.Rh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD,XR(D)::P(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XP(B)::QAB1(F)
        • S(b);::QAB1(F)
        • B(a);::QAB1(F)
      • Refutation
        • S(g);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);CHECK,P_SPINB(a),P_SPINS(b),S_FLIGHT,XS(E)::QAR2(F)
      • P(e);OGATEB,SBLOCK,XS(E)::R(D)
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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).