MESON Chess Problem Database

Problem Display
PID: 225398 (8/1n4bK/1p4Q1/r2p1p2/PRpk4/3p1b2/3Nn2B/3N4 w - - 0 1)

Bosik, Vladimir

Praca, 1956

8/1n4bK/1p4Q1/r2p1p2/PRpk4/3p1b2/3Nn2B/3N4

#2

7 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qxb6#
    • 1...Rc5
      • 2.Qxg7#
    • 1...Be4
      • 2.Sb3#
    • 1...Sc1
      • 2.Qg1#
    • 1...Sg1
      • 2.Qxg1#
    • 1...Sc3
      • 2.Qg1#
    • 1...Sc5
      • 2.Qxg7#
  • Tries
    • 1.Sxf3+?
      • 1...Kc5
        • 2.Qxb6#
      • 1...Ke4!
    • 1.Qe6?
      • threat
        • 2.Sb3#
        • 2.Qe3#
      • 1...Kc5
        • 2.Qxb6#
      • 1...Be4
        • 2.Sb3#
      • 1...Bh6
        • 2.Sb3#
      • 1...Sc1
        • 2.Bg1#
        • 2.Qe3#
      • 1...Sc5
        • 2.Sxf3#
        • 2.Qe3#
      • 1...f4
        • 2.Sb3#
      • 1...Be5!
    • 1.Qf6+?
      • 1...Kc5
        • 2.Qxb6#
      • 1...Bxf6!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Sb3#
      • 1...Kc5
        • 2.Rxc4#
      • 1...Sc1
        • 2.Bg1#
      • 1...Sc5
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(e);N_SPINP(d),S_FLIGHT::QAB1(F),XP(i)
    • R(f);SBLOCK::QAB(F),XB(k)
    • B(c);SBLOCK::S(B)
    • S(a);N_GUARD::QAB(F)
    • S(a);N_GUARD::QAB(F),XS(a)
    • S(j);SBLOCK::QAB(F),XB(k)
  • Tries
    • Try
      • S(B);CHECK,XB(c)
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT::QAB1(F),XP(i)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT::QAB1(F),XP(i)
        • B(c);::S(B)
        • B(k);::S(B)
        • P(h);::S(B)
      • Refutation
        • B(k);
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT::QAB1(F),XP(i)
      • Refutation
        • B(k);XQ(F)
  • Actual
    • Q(F);XP(h)
    • Threat
      • S(B)
    • Vars
      • K(e);N_SPINP(d),P_SPINP(g),S_FLIGHT::R1(E),XP(d)
      • S(a);N_GUARD::B(C)
      • S(j);SBLOCK::S(B),XB(c)
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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).