MESON Chess Problem Database

Problem Display
PID: 169842 (8/rp2B2K/2k5/p2N1P2/2n1Q3/bN6/8/2RR4 w - - 0 1)

Ellerman, Arnoldo

To Alain White, 1945

8/rp2B2K/2k5/p2N1P2/2n1Q3/bN6/8/2RR4

#2

8 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qxc4#
  • Tries
    • 1.Qxc4+?
      • 1...Kd7
        • 2.Qb5#
        • 2.Qc8#
      • 1...Bc5!
    • 1.Qe6+?
      • 1...Kb5
        • 2.Sc3#
      • 1...Bd6!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Sc3#
      • 1...b5+
        • 2.Se7#
      • 1...b6+
        • 2.Sc7#
      • 1...Kb5
        • 2.Qxc4#
      • 1...Kd6
        • 2.Qe6#
      • 1...Kd7
        • 2.Sb6#
      • 1...Bd6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINS(b),S_FLIGHT::QAB1(D),XS(b)
  • Tries
    • Try
      • Q(D);CHECK,XS(b)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);N_SPINS(b),S_FLIGHT::S(E)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(G);
    • Threat
      • QAB(D)+S(E)
    • Vars
      • P(f);CHECK,SBLOCK::QAB(D)+S(E),DCHECK
      • P(f);CHECK,SBLOCK::QAB(D)+S(E)
      • K(d);N_SPINS(b),S_FLIGHT::QAB1(D),XS(b)
      • K(d);N_SPINS(b),P-FLIGHT::QAR1(D)
      • K(d);N_SPINS(b),S_FLIGHT::R(B)+S(E),DCHECK
      • B(a);SBLOCK::QAB(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).