MESON Chess Problem Database

Problem Display
PID: 129864 (B4r2/p3R1Np/5p1K/1N1PPPR1/4k1p1/q4p1n/2P2n2/2Q4b w - - 0 1)

Drnek, Josef

Nove parizske mody, 1904

B4r2/p3R1Np/5p1K/1N1PPPR1/4k1p1/q4p1n/2P2n2/2Q4b

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.exd6#
    • 1...Qa2
      • 2.exf6#
    • 1...Qb3
      • 2.exf6#
    • 1...Qd3
      • 2.exf6#
    • 1...Qa4
      • 2.exf6#
    • 1...Qa5
      • 2.exf6#
    • 1...Rf7
      • 2.d6#
  • Tries
    • 1.Rxg4+?
      • 1...Sf4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Sxg4+!
    • 1.Qe1+?
      • 1...Kf4
        • 2.Sh5#
      • 1...Qe3!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sg3#
      • 1...Qxc1
        • 2.exf6#
      • 1...Qxe7
        • 2.Qe1#
      • 1...Rxa8
        • 2.Sxf6#
      • 1...Qe3
        • 2.exf6#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(c);OGATE::R(I)+P(E),XQ(c)
    • Q(c);N_GUARD::R(I)+P(E),XP(h)
    • R(k);N_GUARD::B(K)+P(D)
  • Tries
    • Try
      • R(G);CHECK,XP(g)
      • Refutation
        • S(b);CHECK,XR(G)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);P-FLIGHT::S(J)
      • Refutation
        • Q(c);P_PINR(G),P_SPINQ(c)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • Q(c);N_GUARD,P_PINR(G),XQ(A)::R(I)+P(E),XP(h)
      • Q(c);N_GUARD,XR(I)::QAR(A)
      • R(k);N_GUARD,XB(K)::S(J),XP(h)
      • Q(c);N_GUARD,P_PINR(G)::R(I)+P(E),XP(h)
      • P(g);::S(J),XP(g)
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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).