MESON Chess Problem Database

Problem Display
PID: 135337 (b7/3N4/r2p4/r7/1pPkpB2/p3R2Q/3N3n/7K w - - 0 1)

Laib, Kurt Friedrich

L'Italia Scacchistica, 1950

b7/3N4/r2p4/r7/1pPkpB2/p3R2Q/3N3n/7K

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qh8#
    • 1...Rd5
      • 2.Rxe4#
    • 1...Rc6
      • 2.Rxe4#
    • 1...Bd5
      • 2.Qh8#
    • 1...d5
      • 2.Be5#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Sb3#
        • 2.Qa1#
      • 1...b3
        • 2.Sxb3#
      • 1...Sxf1!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sb3#
      • 1...Rd5
        • 2.Qxe4#
      • 1...Bd5
        • 2.Qf6#
      • 1...b3
        • 2.Sxb3#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAB(D)
    • R(f);S_CUTB(i)::R1(C),XP(e)
    • R(g);S_CUTB(i)::R1(C),XP(e)
    • B(i);S_CUTR(f)::QAB(D)
    • P(h);N_GUARD,S_CUTR(f)::B(F)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::S(B),XP(c)
      • Refutation
        • S(a);XQ(D)
  • Actual
    • Q(D);
    • Threat
      • S(B)
    • Vars
      • R(f);S_CUTB(i)::QAR1(D),XP(e)
      • B(i);S_CUTR(f)::QAB(D)
      • P(c);::S(B),XP(c)
      • P(h);N_GUARD,S_CUTR(f)::QAB1(D)
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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).