MESON Chess Problem Database

Problem Display
PID: 206513 (8/1N6/4Q3/8/1nPk4/8/3K4/8 w - - 0 1)

Palatz, Franz Ferdinand Ludwig

L'Eclaireur du Soir, 1925

8/1N6/4Q3/8/1nPk4/8/3K4/8

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd5#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sd3
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sc6
      • 2.Qd5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sb3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kxc5!
    • 1.Sd6?
      • threat
        • 2.Qe3#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kc5!
    • 1.Sd8?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa2
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Kc5!
    • 1.Qf5?
      • threat
        • 2.Qf4#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kxc4!
    • 1.Qe5+?
      • 1...Kxc4
        • 2.Sa5#
      • 1...Kxe5!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Sd6#
      • 1...Kxc4!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sb3#
        • 2.Qe3#
      • 1...Kc5
        • 2.Sb3#
      • 1...Sc2
        • 2.Sb3#
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::QAR1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • S(a);N_GUARD::QAR1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XP(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(B)::S(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);P-FLIGHT,XP(B)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT::S(D)
      • S(a);N_GUARD::QAR1(C),XS(a)
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).