MESON Chess Problem Database

Problem Display
PID: 187624 (2Q1K3/2p5/3k1N2/5p2/8/1N6/8/8 w - - 0 1)

Prochazka, Hubert

Narodni listy, 1909

2Q1K3/2p5/3k1N2/5p2/8/1N6/8/8

#2

4 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa6#
  • Tries
    • 1.Qxc7+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxc7!
  • Keys
    • 1.Kf7!
      • threat
        • 2.Qe6#
      • 1...Ke5
        • 2.Qxc7#
      • 1...Kc6
        • 2.Qa6#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(c)::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR1(C)
    • Vars
      • K(b);S_FLIGHT::QAB(C),XP(c)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR2(C)
      • P(c);OGATE::QAB1(C),XP(c)
      • P(c);OGATEB,SBLOCK::QAB(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).