MESON Chess Problem Database

Problem Display
PID: 257822 (3r4/4Rp2/Q4p2/n1Pk1K2/5p2/p2N4/2N1Pq2/8 w - - 0 1)

Labai, Zoltan

5th Comm., Problemist Ukraini, 2020

3r4/4Rp2/Q4p2/n1Pk1K2/5p2/p2N4/2N1Pq2/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Sxf4#
    • 1...Rd7
      • 2.Rxd7#
    • 1...Ra8
      • 2.Rd7#
    • 1...Rb8
      • 2.Rd7#
    • 1...Rc8
      • 2.Rd7#
    • 1...Re8
      • 2.Rd7#
    • 1...Rf8
      • 2.Rd7#
    • 1...Rg8
      • 2.Rd7#
    • 1...Rh8
      • 2.Rd7#
    • 1...Sc4
      • 2.Qb7#
    • 1...f3
      • 2.e4#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Sdb4#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Qe1
        • 2.Sxf4#
      • 1...Sc6
        • 2.Qb3#
      • 1...Qd4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Scb4#
      • 1...Qxc5
        • 2.Sxf4#
      • 1...Qe1
        • 2.Rd4#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Rb8
        • 2.Qd6#
      • 1...Sc6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD,SBLOCK,XP(D)::S(C),XP(c)
    • R(h);N_GUARD::R(G),XR(h)
    • R(h);N_GUARD::R(G)
    • S(d);N_GUARD,SBLOCK::QAB(F)
    • P(c);N_GUARD::P(B)
  • Tries
    • Try
      • Q(F);
      • Threat
        • S(C)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XP(D)::QAR1(F),XQ(a)
        • Q(a);N_GUARD::S(C),XP(c)
        • S(d);N_GUARD,SBLOCK::QAB(F)
      • Refutation
        • Q(a);
  • Actual
    • R(G);
    • Threat
      • S(A)
    • Vars
      • Q(a);N_GUARD,SBLOCK,XP(D)::S(C),XP(c)
      • Q(a);N_GUARD::R1(G)
      • Q(a);N_GUARD::R1(G),XQ(a)
      • R(h);N_GUARD::QAR1(F)
      • S(d);N_GUARD,SBLOCK::QAB1(F)
HTML5 logo

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).