MESON Chess Problem Database

Problem Display
PID: 120115 (8/2N2p2/4RP2/3p1k1B/5p1P/n4n2/1Q6/b2K4 w - - 0 1)

Drnek, Josef

Nove parizske mody, 1906

8/2N2p2/4RP2/3p1k1B/5p1P/n4n2/1Q6/b2K4

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qxb1#
      • 2.Qc2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sc4
      • 2.Qb1#
      • 2.Qc2#
    • 1...Sb5
      • 2.Qb1#
      • 2.Qc2#
  • Tries
    • 1.Re5+?
      • 1...Kxf6
        • 2.Se8#
      • 1...Sxe5!
    • 1.Qb1+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sxb1!
    • 1.Qe2?
      • threat
        • 2.Qd3#
      • 1...Sxh4
        • 2.Qg4#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Se1
        • 2.Qg4#
      • 1...Sd2
        • 2.Qg4#
      • 1...Sg5
        • 2.Qg4#
      • 1...Se5!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sg7#
      • 1...Kxe6
        • 2.Bg4#
      • 1...Sxh4
        • 2.Re5#
      • 1...fxe6
        • 2.Sd6#
      • 1...Se5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::QAB(B),XS(b)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(F)::S(G)
      • Refutation
        • S(c);XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • S(c);OGATE,XP(C)::QAB1(B)
        • P(g);OGATE,XR(E)::QAB1(B),XP(g)
        • S(c);OGATE::QAB1(B)
      • Refutation
        • S(c);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(f);S_FLIGHT,XR(E)::B(D)
      • S(c);N_GUARD,XP(C)::R1(E)
      • P(g);SBLOCK,XR(E)::S(G)
      • S(c);N_GUARD::R1(E),XS(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).