MESON Chess Problem Database

Problem Display
PID: 139753 (2BBn3/2prrn1R/R1b1k3/7N/5P2/b1PQ4/8/3K4 w - - 0 1)

Ellerman, Arnoldo

Club Argentino de Ajedrez, 1917

2BBn3/2prrn1R/R1b1k3/7N/5P2/b1PQ4/8/3K4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.f5#
    • 1...Sfd6
      • 2.Rxe7#
    • 1...Sf6
      • 2.Sg7#
  • Tries
    • 1.Rh6+?
      • 1...Sf6
        • 2.Sg7#
        • 2.Rxf6#
      • 1...Sxh6!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Bd6
        • 2.Qh3#
      • 1...Se5
        • 2.f5#
      • 1...Sfd6
        • 2.Rxe7#
      • 1...Sed6
        • 2.Qg6#
      • 1...Sf6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);SBLOCK::P(D)
    • S(g);N_PINQ(C),N_SPINB(b),OGATE::R1(G),XR(f)
    • S(h);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • S(g);XR(G)
  • Actual
    • P(B);
    • Threat
      • QAB1(C)
    • Vars
      • B(a);N_PINQ(C),N_SPINB(b),SBLOCK::QAB(C)
      • S(g);SBLOCK::P(D)
      • S(g);N_PINQ(C),N_SPINB(b),OGATE::R1(G),XR(f)
      • S(h);N_PINQ(C),N_SPINB(b),SBLOCK::QAR2(C)
      • S(h);N_GUARD,SBLOCK::S(E)
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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).