MESON Chess Problem Database

Problem Display
PID: 124505 (8/8/5NQp/4BpRr/2p2p2/p1P2kNr/K2P1pbp/1nR1b2n w - - 0 1)

Koch, Janos

Magyar Nemzet, 1958

8/8/5NQp/4BpRr/2p2p2/p1P2kNr/K2P1pbp/1nR1b2n

#2

9 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3+
      • 2.Rxc3#
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qe4#
        • 2.Qg4#
        • 2.Qxf4#
      • 1...Sxc3+
        • 2.Rxc3#
      • 1...Rxg3
        • 2.Qe4#
      • 1...Rxg5
        • 2.Qxf4#
      • 1...Bxd2
        • 2.Qe4#
      • 1...Sxd2
        • 2.Qxf4#
      • 1...Sxg3
        • 2.Qg4#
      • 1...hxg5
        • 2.Qg4#
      • 1...Bf1
        • 2.Qe4#
      • 1...f1Q
        • 2.Qxf4#
      • 1...f1S
        • 2.Qxf4#
      • 1...f1B
        • 2.Qxf4#
      • 1...f1R
        • 2.Qxf4#
      • 1...R3h4
        • 2.Qe4#
      • 1...R5h4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,OGATE,XP(D)::R(A),XS(a)
  • Actual
    • Q(I);P_PINP(k),XP(l)
    • Threat
      • DUALS(3)
    • Vars
      • S(a);CHECK,OGATE,XP(D)::R(A),XS(a)
      • R(i);XS(E)::QAB1(I)
      • R(m);XR(G)::QAR1(I),XP(k)
      • B(b);XP(C)::QAB1(I)
      • S(a);XP(C)::QAR1(I),XP(k)
      • S(c);XS(E)::QAB1(I)
      • P(n);XR(G)::QAB1(I)
      • B(e);::QAB1(I)
      • P(d);::QAR1(I),XP(k)
      • R(i);::QAB1(I)
      • R(m);::QAB1(I)
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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).