MESON Chess Problem Database

Problem Display
PID: 262441 (2n2R2/3bB3/p1P5/4kP2/2QN2p1/3n1PP1/5b2/1K4N1 w - - 0 1)

Valuska, Jan

HM., Europe Echecs, 1976

2n2R2/3bB3/p1P5/4kP2/2QN2p1/3n1PP1/5b2/1K4N1

#2

10 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf5
      • 2.Rxf5#
    • 1...Bxc6
      • 2.Sxc6#
    • 1...Sc1
      • 2.Qc5#
    • 1...Se1
      • 2.Qc5#
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Bf6#
    • 1...gxf3
      • 2.Sdxf3#
  • Tries
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Se2#
      • 1...Bxe6!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qe4#
      • 1...Bxf5
        • 2.Bf6#
      • 1...Bxc6
        • 2.Qe6#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.f4#
      • 1...Sd6
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(f);OGATE,XP(G)::R1(J),XB(f)
    • B(f);XP(H)::S(F),XB(f)
    • S(b);N_GUARD::QAR2(E)
    • S(b);N_GUARD::QAR2(E),XS(b)
    • S(g);SBLOCK::B(I)
    • P(c);XP(C)::S(F),XP(c)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_CUTB(f),S_FLIGHT,XS(F)::S(B)
      • Refutation
        • B(f);XQ(E)
  • Actual
    • S(F);
    • Threat
      • QAR1(E)
    • Vars
      • B(f);SBLOCK,XP(G)::B(I)
      • B(f);N_GUARD,XP(H)::QAR1(E)
      • P(c);XP(C)::S(B),XP(c)
      • B(a);N_GUARD::QAB1(E),XB(a)
      • S(b);N_GUARD::P(C)
      • S(g);N_GUARD::B(I),XS(g)
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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).