MESON Chess Problem Database

Problem Display
PID: 257894 (b4B2/r2p2QK/p4r2/8/1N1k2n1/2p2p2/Bn1N4/4R2R w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

b4B2/r2p2QK/p4r2/8/1N1k2n1/2p2p2/Bn1N4/4R2R

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Sxf3#
      • 2.Re4#
    • 1...Be4+
      • 2.Rxe4#
    • 1...Sd3
      • 2.Sc2#
    • 1...Sc4
      • 2.Sb3#
    • 1...Sf2
      • 2.Qxf6#
    • 1...Sh2
      • 2.Qxf6#
    • 1...Se3
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qxf6#
    • 1...d5
      • 2.Sxf3#
    • 1...d6
      • 2.Qxa7#
  • Tries
    • 1.Qxf6+?
      • 1...Se5
        • 2.Qxe5#
        • 2.Qb6#
      • 1...Sxf6+!
    • 1.Qxg4+?
      • 1...Be4+
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Rf4!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qxf6#
      • 1...Be4+
        • 2.Rxe4#
      • 1...d6
        • 2.Qxa7#
      • 1...Sd3
        • 2.Sc2#
      • 1...Sc4
        • 2.Sb3#
      • 1...d5
        • 2.Sxf3#
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(j);CHECK,N_GUARD::R1(A),XB(j)
    • S(a);SBLOCK::S(E)
    • S(a);SBLOCK::S(D)
    • S(e);N_GUARD::QAB(F),XR(g)
    • P(i);P_PINQ(F),S_CUTB(j)::S(D),XP(c)
    • P(i);OGATE,P_PINQ(F)::QAB(F),XR(h)
  • Tries
    • Try
      • Q(F);CHECK,XR(g)
      • Refutation
        • S(e);CHECK,XQ(F)
    • Try
      • Q(F);CHECK,N_PINR(g),XS(e)
      • Refutation
        • R(g);P_SPINR(g)
  • Actual
    • R(B);P_PINS(e)
    • Threat
      • QAB(F),XR(g)
    • Vars
      • B(j);CHECK,N_GUARD,N_SPINS(e)::R1(A),XB(j)
      • P(i);OGATE,P_PINQ(F)::QAB(F),XR(h)
      • S(a);SBLOCK::S(E)
      • S(a);SBLOCK::S(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).