MESON Chess Problem Database

Problem Display
PID: 171053 (3R4/1p1B3p/P3PQ2/RNp5/2p1k3/2B5/K3pP1b/8 w - - 0 1)

Valuska, Jan

Comm., Israel Ring Ty., 1988

3R4/1p1B3p/P3PQ2/RNp5/2p1k3/2B5/K3pP1b/8

#2

10 + 7

721 Variantim 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qf5#
    • 1...Kd5
      • 2.Qf3#
    • 1...bxa6
      • 2.Bc6#
    • 1...b6
      • 2.Bc6#
  • Tries
    • 1.Bc8?
      • threat
        • 2.Bxb7#
      • 1...bxa6
        • 2.Bb7#
      • 1...b6
        • 2.Bb7#
      • 1...Bd6!
    • 1.Rf8?
      • threat
        • 2.Qf3#
        • 2.Qf5#
      • 1...Kd3
        • 2.Qf5#
      • 1...Kd5
        • 2.Qf3#
      • 1...e1S
        • 2.Qf5#
      • 1...Be5
        • 2.Qf3#
      • 1...Bf4!
    • 1.axb7?
      • threat
        • 2.Bc6#
      • 1...Kd3
        • 2.Qf5#
      • 1...Kd5
        • 2.Qf3#
      • 1...Bd6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qf3#
      • 1...Kd5
        • 2.Bc6#
      • 1...Be5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(d);S_FLIGHT::QAB(H)
    • P(f);N_GUARD,XP(F)::B(I)
    • P(f);N_GUARD::B(I)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(I),XP(f)
      • Vars
        • P(f);XP(F)::B(I)
        • P(f);::B(I)
      • Refutation
        • B(b);
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);S_FLIGHT::QAB(H)
        • P(a);::QAB1(H)
        • B(b);::QAB1(H)
      • Refutation
        • B(b);
    • Try
      • P(F);XP(f)
      • Threat
        • B(I)
      • Vars
        • K(d);S_FLIGHT::QAB(H)
      • Refutation
        • B(b);
  • Actual
    • S(E);
    • Threat
      • QAB1(H)
    • Vars
      • K(d);S_FLIGHT::QAR2(H)
      • K(d);P_SPINP(e),S_FLIGHT::R(J)+B(I),DCHECK
      • B(b);SBLOCK::QAB1(H)
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).