MESON Chess Problem Database

Problem Display
PID: 98762 (5B2/p2ppp2/K7/8/RPk1P2R/3pP3/3P2P1/3B3Q w - - 0 1)

Servais, Albert

Problem (Zagreb), 1954

5B2/p2ppp2/K7/8/RPk1P2R/3pP3/3P2P1/3B3Q

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.b5#
    • 1...e6
      • 2.b5#
  • Tries
    • 1.Ra5?
      • threat
        • 2.e5#
      • 1...Kxb4
        • 2.e5#
      • 1...d5
        • 2.exd5#
      • 1...f5
        • 2.exf5#
      • 1...e5!
    • 1.Qh2?
      • threat
        • 2.Qc7#
      • 1...e5
        • 2.b5#
      • 1...d6!
  • Keys
    • 1.g3!
      • threat
        • 2.e5#
      • 1...d5
        • 2.exd5#
      • 1...e5
        • 2.b5#
      • 1...f5
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);::R(F)+P(G)
  • Tries
    • Try
      • R(F);
      • Threat
        • R(I)+P(H)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(e),XP(G)::R(I)+P(H)
        • P(d);OGATE::R(I)+P(H),XP(d)
        • P(f);OGATE::R(I)+P(H),XP(f)
      • Refutation
        • P(e);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(e);::R(F)+P(G)
      • Refutation
        • P(d);
  • Actual
    • P(D);
    • Threat
      • R(I)+P(H)
    • Vars
      • P(d);OGATE::R(I)+P(H),XP(d)
      • P(e);::R(F)+P(G)
      • P(f);OGATE::R(I)+P(H),XP(f)
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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).