MESON Chess Problem Database

Problem Display
PID: 108512 (2n1b2B/2nqbP1K/2p1rr2/4k1NR/1P2p3/1Q6/4N3/8 w - - 0 1)

Jurka, Eriks

Latvian Championship, 1959

2n1b2B/2nqbP1K/2p1rr2/4k1NR/1P2p3/1Q6/4N3/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sf3#
      • 2.Sh3#
      • 2.Sxe6#
    • 1...Rd6
      • 2.Sf3#
      • 2.Se6#
    • 1...Bd6
      • 2.Sf3#
      • 2.Sh3#
      • 2.Sxe6#
    • 1...Bxf7
      • 2.Sxf7#
    • 1...Sd6
      • 2.Sf3#
  • Tries
    • 1.Qg3+?
      • 1...Kf5
        • 2.Sf3#
        • 2.Sh3#
        • 2.Qf4#
      • 1...Kd5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sxe4#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd6
        • 2.Qc5#
      • 1...Bxf7
        • 2.Sxf7#
      • 1...Rd6
        • 2.Qxe4#
      • 1...Sd6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(j);XP(F)::R(E)+S(D),DCHECK,XB(j)
    • S(i);SBLOCK::R(E)+S(D),DCHECK
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);N_SPINR(e),P-FLIGHT
  • Actual
    • Q(B);P_PINP(a)
    • Threat
      • R(E)+S(D),XP(a)
    • Vars
      • K(b);N_SPINP(a),N_SPINR(e),P-FLIGHT::QAR1(B)
      • K(b);N_SPINP(a),N_SPINR(e),S_FLIGHT::QAB1(B)
      • B(j);XP(F)::R(E)+S(D),DCHECK,XB(j)
      • R(d);SBLOCK::QAR1(B),XP(a)
      • S(i);SBLOCK::R(E)+S(D),DCHECK
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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).