MESON Chess Problem Database

Problem Display
PID: 230652 (1b4b1/3n4/1pB1p3/1P3p2/1QpB1R2/3k2K1/1R2N1N1/2rqr3 w - - 0 1)

Makaronets, Leonid

Best Problems, 2021

1b4b1/3n4/1pB1p3/1P3p2/1QpB1R2/3k2K1/1R2N1N1/2rqr3

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Rd2#
      • 2.Qd2#
    • 1...Qa4
      • 2.Rd2#
      • 2.Qd2#
    • 1...Qd2
      • 2.Rxd2#
      • 2.Qxd2#
    • 1...Ra1
      • 2.Qc3#
    • 1...Rb1
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Bxf4+
      • 2.Sgxf4#
    • 1...Ba7
      • 2.Rf3#
    • 1...e5
      • 2.Rf3#
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qxc4#
      • 1...Bxf4+
        • 2.Sexf4#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Qb3
        • 2.Rd2#
      • 1...Qa4
        • 2.Rd2#
      • 1...Se5
        • 2.Rd4#
      • 1...e5
        • 2.Rf3#

This is after 223592

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAR1(E)
    • R(a);N_GUARD::QAR1(E),XR(a)
    • B(j);CHECK,XR(G)::S(C),XB(j)
    • B(j);N_PINR(G)::R(G)
    • P(h);N_PINR(G)::R(G)
  • Actual
    • B(F);
    • Threat
      • QAB1(E),XP(e)
    • Vars
      • B(j);CHECK,XR(G)::S(B),XB(j)
      • R(a);OGATE,XB(F)::QAR1(E),XR(a)
      • Q(b);N_GUARD::R1(A)
      • S(i);N_PINR(G)::R1(G)
      • P(h);N_PINR(G)::R(G)
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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).