MESON Chess Problem Database

Problem Display
PID: 146622 (rn1Kb1r1/2B2p2/p1pN1pn1/4kBp1/2Pq2P1/4p3/1Q4N1/8 w - - 0 1)

Ellerman, Arnoldo

Good Companions (February), 1918

rn1Kb1r1/2B2p2/p1pN1pn1/4kBp1/2Pq2P1/4p3/1Q4N1/8

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Sb5#
    • 1...Qc3
      • 2.Sb5#
      • 2.Qxc3#
    • 1...Bd7+
      • 2.Se8#
    • 1...Sd7+
      • 2.Sc8#
  • Keys
    • 1.Se1!
      • threat
        • 2.Sd3#
      • 1...Bd7+
        • 2.Se8#
      • 1...Sd7+
        • 2.Sc8#
      • 1...Kf4
        • 2.Qh2#
      • 1...Qxb2
        • 2.Sb5#
      • 1...Qc3
        • 2.Sb5#
      • 1...Sf4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINS(F),N_SPINQ(b),XQ(A)::B(G)+S(F)
    • B(l);CHECK,N_PINS(F)::B(G)+S(F)
    • S(k);CHECK,N_PINS(F)::B(G)+S(F)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(l);CHECK,N_PINS(F)::B(G)+S(F)
      • S(k);CHECK,N_PINS(F)::B(G)+S(F)
      • K(c);N_SPINQ(b),S_FLIGHT::QAB(A)
      • Q(b);N_PINS(F),N_SPINQ(b),XQ(A)::B(G)+S(F)
      • Q(b);N_PINS(F)::B(G)+S(F)
      • S(h);SBLOCK::S(B)
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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).