MESON Chess Problem Database

Problem Display
PID: 58100 (8/3p3K/3R2R1/1p2kNp1/5p2/r2b2PB/n2QpN1b/3qr3 w - - 0 1)

Driver, John Edward

Chess Life, 1958

8/3p3K/3R2R1/1p2kNp1/5p2/r2b2PB/n2QpN1b/3qr3

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rd5#
    • 1...Bc2
      • 2.Rd5#
    • 1...Bxf5
      • 2.Rd5#
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.Qe3+?
      • 1...Be4
        • 2.Qxe4#
      • 1...fxe3!
  • Keys
    • 1.Sh4!
      • threat
        • 2.Sf3#
      • 1...Bxg6+
        • 2.Sxg6#
      • 1...gxh4
        • 2.Qxf4#
      • 1...Bb1
        • 2.Rd5#
      • 1...Bc2
        • 2.Rd5#
      • 1...Bc4
        • 2.Rxg5#
      • 1...Be4
        • 2.Sg4#
      • 1...Bf5
        • 2.Rd5#
      • 1...f3
        • 2.Sxf3#
      • 1...g4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(g);::R1(F)
    • B(g);P_PINR(G),XS(E)::R1(F)
    • P(k);N_GUARD::QAB1(A),XP(h)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • P(h);XQ(A)
  • Actual
    • S(E);P_SPINR(G)
    • Threat
      • S(E)
    • Vars
      • B(g);CHECK,XR(G)::S(E),XB(g)
      • P(k);N_GUARD,XS(E)::QAB1(A),XP(h)
      • B(g);::R1(F)
      • B(g);N_PINR(G)::R(G),XP(k)
      • B(g);SBLOCK::S(B)
      • P(h);::S(E),XP(h)
      • P(k);N_GUARD::QAB1(A),XP(h)
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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).