MESON Chess Problem Database

Problem Display
PID: 170932 (3B4/8/p2Rp3/qkN5/p2RN3/P2PP3/3Q4/4bK2 w - - 0 1)

Herpai, S Ferenc

Problemisten, 1947

3B4/8/p2Rp3/qkN5/p2RN3/P2PP3/3Q4/4bK2

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qb6
      • 2.Rxb6#
    • 1...Bf2
      • 2.Qxa5#
    • 1...Bg3
      • 2.Qxa5#
    • 1...Bh4
      • 2.Qxa5#
  • Tries
    • 1.Sb7?
      • 1...Qxd2
        • 2.Rb6#
      • 1...Qxd8
        • 2.Sc3#
        • 2.Rb4#
      • 1...Qc3
        • 2.Sxc3#
        • 2.Rb6#
      • 1...Qb4
        • 2.Rxb4#
        • 2.Rb6#
      • 1...Qb6
        • 2.Sc3#
        • 2.Rb4#
        • 2.Rxb6#
      • 1...Qc7
        • 2.Rb4#
      • 1...Bf2
        • 2.Qxa5#
      • 1...Bg3
        • 2.Qxa5#
      • 1...Bh4
        • 2.Qxa5#
      • 1...e5
        • 2.R4d5#
      • 1...Bxd2!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.R4d5#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Qb4
        • 2.Rxb4#
      • 1...Qb6
        • 2.Rxb6#
      • 1...Qc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::R1(F),XQ(c)
    • Q(c);N_GUARD::R1(I),XQ(c)
    • B(a);N_GUARD::QAR1(B),XQ(c)
  • Tries
    • Try
      • S(H);
      • Vars
        • Q(c);N_GUARD,XQ(B)::R1(I)
        • Q(c);N_GUARD::R1(F)
        • B(a);N_GUARD::QAR1(B),XQ(c)
        • P(f);N_GUARD::R(F)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • S(H);XP(f)
    • Threat
      • R(F)
    • Vars
      • Q(c);N_GUARD::S(G),XQ(c)
      • Q(c);N_GUARD::R1(F),XQ(c)
      • Q(c);N_GUARD::R1(I),XQ(c)
      • Q(c);N_GUARD::S(H),XQ(c)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).