MESON Chess Problem Database

Problem Display
PID: 270843 (R5K1/N1pn4/1p3p2/2PkP3/1n2R3/4B2B/b2NQ3/8 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Shakhmatnaya kompozitsiya, 2021

R5K1/N1pn4/1p3p2/2PkP3/1n2R3/4B2B/b2NQ3/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa6
      • 2.Qd3#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qxd7#
      • 1...Sxc5
        • 2.Rd8#
      • 1...Sxe5
        • 2.Rd4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb8
        • 2.c6#
      • 1...Sf8
        • 2.c6#
      • 1...c6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qf7#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Sxe5
        • 2.Rd8#
      • 1...Sf8
        • 2.exf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • S(b);N_GUARD::QAR2(B),XS(b)
    • S(b);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XS(g)
      • Vars
        • S(g);OGATEB,P_SPINS(g),XP(F)::R(I)
        • S(g);SBLOCK,XP(G)::R1(E)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(g);N_GUARD::QAR(B)+P(F)
      • Refutation
        • P(f);
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(g);SBLOCK,XP(F)::R1(E)
      • S(g);OGATEB,P_SPINS(g),XP(G)::R(I)
      • S(g);N_GUARD::QAR(B)+P(G),XP(e)
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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).