MESON Chess Problem Database

Problem Display
PID: 2236 (4R3/1nPp1p2/8/1Np1P1K1/Rp1pkPp1/1P3pP1/2PQ4/8 w - - 0 1)

Cook, Eugene Beauharnais

Source?, 0000

4R3/1nPp1p2/8/1Np1P1K1/Rp1pkPp1/1P3pP1/2PQ4/8

#2

11 + 9

1679 American Chess Nuts 1868
119 Tidskrift for Schack 1909
15 British Chess Magazine 1915
14907 Good Companion Chess Problem Club 1915
3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxd3#
    • 1...c4
      • 2.Qxd4#
    • 1...d5
      • 2.Qe1#
      • 2.Qd3#
  • Tries
    • 1.Sc3+?
      • 1...dxc3
        • 2.Qd3#
      • 1...bxc3!
  • Keys
    • 1.c4!
      • 1...f6+
        • 2.exf6#
      • 1...bxc4 ep
        • 2.Sxc3#
      • 1...dxc4 ep
        • 2.Sxc3#
      • 1...f2
        • 2.Qe2#
      • 1...Sa5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
        • 2.exd6#
      • 1...Sd8
        • 2.Sd6#
      • 1...d3
        • 2.Qe1#
      • 1...d5
        • 2.exd5 ep#
      • 1...d6
        • 2.exd6#
      • 1...f5
        • 2.exf5 ep#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • P(c);P_SPINP(b)::QAB1(B),XP(c)
    • P(f);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • P(c);P_SPINP(b),XS(G)::QAB1(B)
      • Refutation
        • P(b);P_SPINP(c),XS(G)
  • Actual
    • P(A);
    • Vars
      • P(i);CHECK,OGATE::R(K)+P(H),XP(i)
      • P(b);EP,N_GUARD,P_SPINP(c),XP(A)::S(G),XP(b)
      • P(c);EP,N_GUARD,P_SPINP(b),XP(A)::S(G),XP(c)
      • P(a);N_GUARD::QAR2(B)
      • S(g);N_GUARD::S(G)
      • P(c);SBLOCK::QAR(B)
      • P(h);OGATE::R(K)+P(H),XP(h),EP
      • P(h);OGATE::R(K)+P(H),XP(h)
      • P(i);OGATE::R(K)+P(H),XP(i),EP
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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).