MESON Chess Problem Database

Problem Display
PID: 99571 (2r3n1/1QP1n3/1Pp1R1N1/3k1Pp1/2R3p1/2Kp4/4P1q1/8 w - - 0 1)

Visserman, Eeltje

Magyar Sakkszovetseg, 1964

2r3n1/1QP1n3/1Pp1R1N1/3k1Pp1/2R3p1/2Kp4/4P1q1/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.e4#
    • 1...Qh3
      • 2.e4#
    • 1...Qg1
      • 2.e4#
    • 1...Qf2
      • 2.e4#
    • 1...Qh2
      • 2.e4#
    • 1...Qg3
      • 2.e4#
    • 1...Rd8
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Sxf5
      • 2.Qxc6#
    • 1...Sxg6
      • 2.Qxc6#
    • 1...Sf6
      • 2.Sxe7#
    • 1...Sh6
      • 2.Sxe7#
  • Tries
    • 1.Rcxc6?
      • threat
        • 2.Re5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxg6
        • 2.Rc4#
      • 1...Qe4
        • 2.Red6#
      • 1...Qh2
        • 2.e4#
      • 1...Qg3
        • 2.e4#
      • 1...Qxe2!
  • Keys
    • 1.Rexc6!
      • threat
        • 2.Rd4#
      • 1...Sxf5
        • 2.Rf6#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxg6
        • 2.Re6#
      • 1...Qg1
        • 2.e4#
      • 1...Qe4
        • 2.R4c5#
      • 1...Qf2
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::P(A)
    • R(h);OGATE::PXR(h)=Q
    • S(g);N_GUARD,XP(D)::QAB1(H),XP(f)
    • S(g);N_GUARD,XS(G)::QAB1(H),XP(f)
    • S(i);N_GUARD::S(G),XS(g)
  • Tries
    • Try
      • R(C);XP(f)
      • Threat
        • R1(F)
      • Vars
        • S(g);OGATE,P_SPINS(g),XR(C)::QAB1(H),XS(g)
        • S(g);N_GUARD,XS(G)::QAB(H)+R(C)
        • Q(a);SBLOCK::R1(F)
        • Q(a);N_GUARD::P(A)
      • Refutation
        • Q(a);XP(A)
  • Actual
    • R(F);XP(f)
    • Threat
      • R1(C)
    • Vars
      • S(g);N_GUARD,XP(D)::QAB(H)+R(F)
      • S(g);OGATE,P_SPINS(g),XR(F)::QAB1(H),XS(g)
      • S(g);N_GUARD,XS(G)::QAB(H)+R(F)
      • Q(a);N_GUARD::P(A)
      • Q(a);SBLOCK::R1(C)
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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).