MESON Chess Problem Database

Problem Display
PID: 82477 (3RKN2/1N2p2Q/3P4/3k4/1R1P2p1/r7/n7/3r1n2 w - - 0 1)

Havel, Miroslav

Prager Presse, 1922

3RKN2/1N2p2Q/3P4/3k4/1R1P2p1/r7/n7/3r1n2

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qe4#
    • 1...Ra4
      • 2.Qh1#
    • 1...Ra5
      • 2.Qh1#
    • 1...Ra6
      • 2.Qh1#
    • 1...Ra7
      • 2.Qh1#
    • 1...Ra8
      • 2.Qh1#
    • 1...exd6
      • 2.Rxd6#
  • Tries
    • 1.Qf5+?
      • 1...Kc6
        • 2.Rc8#
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qc5#
      • 1...e5!
  • Keys
    • 1.Sa5!
      • threat
        • 2.dxe7#
      • 1...Rxd4
        • 2.Rb5#
      • 1...Rxa5
        • 2.Qh1#
      • 1...exd6
        • 2.Qf5#
        • 2.Qb7#
      • 1...e5
        • 2.Qb7#
      • 1...e6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(f);S_FLIGHT::QAB(E)
    • R(d);N_GUARD::QAB(E)
    • R(d);N_GUARD,P_PINR(F)::QAB(E)
    • P(g);OGATE,P_SPINP(g),XP(C)::R1(F),XP(g)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • S(D);
    • Threat
      • R(F)+P(C),XP(g)
    • Vars
      • R(a);SBLOCK,XP(B)::R(A)
      • R(d);N_GUARD,XS(D)::QAB(E)
      • P(g);OGATE::QAB(E)
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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).