MESON Chess Problem Database

Problem Display
PID: 63632 (1K3Q2/2B1R3/1p2bp2/pPk5/P3n2R/2N5/2P1N2b/7q w - - 0 1)

Ellerman, Arnoldo

Chess, 1946

1K3Q2/2B1R3/1p2bp2/pPk5/P3n2R/2N5/2P1N2b/7q

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc7+
      • 2.Rxc7#
    • 1...Bc4
      • 2.Re5#
    • 1...Sg3
      • 2.Rxe6#
      • 2.Rd7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Reh7#
      • 2.Re8#
  • Tries
    • 1.Bxh2?
      • threat
        • 2.Rc7#
      • 1...Kb4
        • 2.Rc7#
      • 1...Kc4
        • 2.Rc7#
      • 1...Sxc3
        • 2.Rd7#
      • 1...Bd7
        • 2.Rexe4#
      • 1...Sd6!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Rc7#
      • 1...Kb4
        • 2.Rc7#
      • 1...Kc4
        • 2.Rc7#
      • 1...Sxc3
        • 2.Rd7#
      • 1...Bd7
        • 2.Rexe4#
      • 1...Sd6
        • 2.Bf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(b);CHECK,OGATE,XB(G)::QAB(J)+R(H),DCHECK,XB(b)
    • B(g);OGATE,SBLOCK::QAB(J)+R(H),DCHECK
  • Tries
    • Try
      • B(G);N_SPINB(G),XB(b)
      • Threat
        • QAB(J)+R(H),DCHECK
      • Vars
        • K(e);P_SPINS(c),S_FLIGHT::QAB(J)+R(H)
        • K(e);P-FLIGHT,P_SPINS(c)::R(H)
        • S(c);N_GUARD,XS(C)::QAB(J)+R(H)
        • B(g);OGATE::QAB(J)+R(H),XS(c)
      • Refutation
        • S(c);
  • Actual
    • B(G);
    • Threat
      • QAB(J)+R(H),DCHECK
    • Vars
      • K(e);P_SPINS(c),S_FLIGHT::QAB(J)+R(H)
      • K(e);P-FLIGHT,P_SPINS(c)::R(H)
      • S(c);N_GUARD,XS(C)::QAB(J)+R(H)
      • B(g);OGATE::QAB(J)+R(H),XS(c)
      • S(c);N_PINB(G),SBLOCK::B(G)
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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).