MESON Chess Problem Database

Problem Display
PID: 139819 (1n1Rn1K1/p4p2/Bk3p2/1N1P3p/1N1P4/QR4br/2r5/3b3q w - - 0 1)

Neumann, Itzhak

The Problemist, 1937

1n1Rn1K1/p4p2/Bk3p2/1N1P3p/1N1P4/QR4br/2r5/3b3q

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Rxb8#
    • 1...Bf2
      • 2.Rxb8#
    • 1...Bh4
      • 2.Rxb8#
    • 1...Sxa6
      • 2.Qxa6#
    • 1...Sc7
      • 2.Rxb8#
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sa8#
      • 1...Kxc7
        • 2.Qa5#
      • 1...Qxd5
        • 2.Scxd5#
      • 1...Rxc7
        • 2.Sc2#
      • 1...Bxc7
        • 2.Sd3#
      • 1...Sxa6
        • 2.Sbxa6#
      • 1...Sxc7
        • 2.Rxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(d);N_GUARD::R(H),XS(k)
    • S(k);OGATE,XB(G)::QAR1(A),XS(k)
    • S(l);S_CUTB(d)::R(H),XS(k)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(g);S_FLIGHT,XS(E)::QAB(A)
      • Q(b);XP(F)::S(E),XQ(b)
      • R(c);SBLOCK,XS(E)::R(B)+S(C)
      • B(d);SBLOCK,XS(E)::R(B)+S(C)
      • S(k);XB(G)::R(B)+S(C),XS(k)
      • S(l);SBLOCK,XS(E)::R(H),XS(k)
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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).