MESON Chess Problem Database

Problem Display
PID: 227466 (8/1Q6/8/6N1/1Pk5/8/2K5/8 w - - 0 1)

de Savignac Castelet, G Arnaud

L'Express du Midi, 1926

8/1Q6/8/6N1/1Pk5/8/2K5/8

#2

4 + 1

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe4#
  • Tries
    • 1.Kb2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kd3!
    • 1.Kd2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kb3!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qc5#
      • 1...Kxb4!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kxb5!
    • 1.Qe7?
      • threat
        • 2.Qc5#
      • 1...Kd4
        • 2.Qc5#
        • 2.Qe4#
      • 1...Kd5
        • 2.Qc5#
      • 1...Kb5!
  • Keys
    • 1.Qb6!
      • 1...Kd5
        • 2.Qc5#

This anticipates 241914(1933), 241973(1933), 242051(1936)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
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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).