MESON Chess Problem Database

Problem Display
PID: 203205 (r7/b2B2p1/3pPn2/1p1k4/6R1/Q2N3p/K1P1P3/n2r1b2 w - - 0 1)

Fiala, Karel

Prachensky kraj, 1924

r7/b2B2p1/3pPn2/1p1k4/6R1/Q2N3p/K1P1P3/n2r1b2

#2

8 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxa8#
    • 1...Bf2
      • 2.Qxa8#
    • 1...Be3
      • 2.Qxa8#
    • 1...Bc5
      • 2.Qxa8#
    • 1...Bb6
      • 2.Qxa8#
    • 1...Bb8
      • 2.Qxa8#
    • 1...Sxc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
  • Keys
    • 1.Qa4!
      • threat
        • 2.Rg5#
      • 1...Sxg4
        • 2.e4#
      • 1...Sxd7
        • 2.Qe4#
      • 1...bxa4
        • 2.c4#
      • 1...Be3
        • 2.Qxa8#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sh7
        • 2.Qe4#
        • 2.e4#
      • 1...b4
        • 2.Qc6#
      • 1...g5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 7
  • Sets
    • B(i);OGATE,P_PINQ(D)::QAB(D),XR(k)
    • S(a);N_GUARD,XP(B)::QAB(D)
    • S(a);N_GUARD::QAB(D),XS(a)
  • Actual
    • Q(D);
    • Threat
      • R(F)
    • Vars
      • S(h);N_GUARD,XR(F)::P(C)
      • S(h);N_GUARD,XB(H)::QAB1(D)
      • P(e);N_GUARD,XQ(D)::P(B)
      • B(i);OGATE,P_PINQ(D)::QAB(D),XR(k)
      • B(i);N_GUARD,P_PINQ(D)::R1(F),XB(i)
      • S(h);N_GUARD::QAB1(D),XS(h)
      • P(e);OGATE::QAB1(D)
      • P(j);::R(F),XP(j)
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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).