MESON Chess Problem Database

Problem Display
PID: 225930 (3Q1b1r/1p3KPp/1P2p1nN/2P1p2N/p2Pk2p/r6R/2bR1PP1/3n1B2 w - - 0 1)

Westbury, Eric Ernest

Tidskrift for Schack, 1910

3Q1b1r/1p3KPp/1P2p1nN/2P1p2N/p2Pk2p/r6R/2bR1PP1/3n1B2

#2

13 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3+
      • 2.gxf3#
    • 1...Bb3
      • 2.Bd3#
    • 1...Sc3
      • 2.Re3#
    • 1...Se3
      • 2.f3#
    • 1...Sf4
      • 2.Sf6#
    • 1...Se7
      • 2.Rxh4#
    • 1...exd4
      • 2.Qxd4#
  • Tries
    • 1.Re3+?
      • 1...Sxe3
        • 2.f3#
      • 1...Rxe3!
    • 1.Rxh4+?
      • 1...Sf4
        • 2.Sf6#
      • 1...Sxh4!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Bxb7#
      • 1...Rf3+
        • 2.gxf3#
      • 1...exd4
        • 2.Qxd4#
      • 1...bxa6
        • 2.Qa8#
      • 1...Bb3
        • 2.Bd3#
      • 1...Sc3
        • 2.Re3#
      • 1...Se3
        • 2.f3#
      • 1...Sf4
        • 2.Sf6#
      • 1...Se7
        • 2.Rxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE::P(D),XR(c)
    • B(b);N_GUARD,S_CUTR(c)::B(A)
    • S(a);N_GUARD,S_CUTR(c)::R1(E)
    • S(a);SBLOCK,S_CUTR(c)::P(C)
    • S(i);SBLOCK::S(H)
    • S(i);N_GUARD::R(E),XP(f)
    • P(g);OGATE,XP(F)::QAR1(M),XP(g)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(a);SBLOCK,XR(E)::P(C)
      • Refutation
        • R(c);XR(E)
    • Try
      • R(E);CHECK,XP(f)
      • Vars
        • S(i);P_SPINS(i)::S(H)
      • Refutation
        • S(i);XR(E)
  • Actual
    • B(A);
    • Threat
      • B(A),XP(j)
    • Vars
      • R(c);CHECK,OGATE::P(D),XR(c)
      • P(g);OGATE,XP(F)::QAR1(M),XP(g)
      • P(j);OGATEB,XB(A)::QAB(M)
      • B(b);N_GUARD,S_CUTR(c)::B(A)
      • S(a);N_GUARD,S_CUTR(c)::R1(E)
      • S(a);SBLOCK,S_CUTR(c)::P(C)
      • S(i);SBLOCK::S(H)
      • S(i);N_GUARD::R(E),XP(f)
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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).