MESON Chess Problem Database

Problem Display
PID: 105532 (3n4/1p1Kp2B/6Q1/3k4/P1p5/4P3/8/8 w - - 0 1)

Costin, Victor

La Presse, 1897

3n4/1p1Kp2B/6Q1/3k4/P1p5/4P3/8/8

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qf5#
      • 2.Qg5#
    • 1...Se6
      • 2.Qf5#
    • 1...e5
      • 2.Qd6#
  • Tries
    • 1.Qg2+?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kc5!
    • 1.Qb6?
      • threat
        • 2.Qd4#
        • 2.Qb5#
      • 1...Ke5
        • 2.Qd4#
      • 1...e5
        • 2.Qb5#
        • 2.Qd6#
        • 2.e4#
      • 1...Sc6
        • 2.Qb5#
      • 1...Se6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Se6
        • 2.Qf5#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);S_CUTP(d)::QAR2(C)
    • P(d);N_GUARD::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
        • S(e);::QAR2(C)
      • Refutation
        • S(e);
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • S(e);S_CUTP(d)::QAR2(C)
      • P(c);::QAR2(C),XP(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).