MESON Chess Problem Database

Problem Display
PID: 10270 (1b3rQ1/2B1p1N1/2p1Pr2/2Pk2qR/3N1pp1/1PP5/8/1B1RK3 w - - 0 1)

Lender, Baruch

5th Comm., Israel Ring Ty., 1963

1b3rQ1/2B1p1N1/2p1Pr2/2Pk2qR/3N1pp1/1PP5/8/1B1RK3

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Rxe5#
    • 1...Rxe6+
      • 2.Sdxe6#
  • Keys
    • 1.Bb6!
      • threat
        • 2.Sf3#
      • 1...Qe5+
        • 2.Se2#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Ke5
        • 2.Sxc6#
      • 1...Be5
        • 2.c4#
      • 1...f3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(d);CHECK,OGATE::R1(H),XQ(d)
    • R(f);CHECK,P_SPINR(f),XP(I)::R(B)+S(F),XR(f)
  • Actual
    • B(J);
    • Threat
      • R(B)+S(F)
    • Vars
      • Q(d);CHECK::R(B)+S(F)
      • R(f);CHECK,OGATE,P_SPINR(f),XP(I)::QAB1(L),XR(f)
      • K(c);P-FLIGHT::S(F),XP(e)
      • B(h);N_SPINQ(d),SBLOCK::P(E)
      • P(a);::R(B)+S(F),XP(a)
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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).