MESON Chess Problem Database

Problem Display
PID: 2904 (1B3K2/3p2p1/1p1R4/4kp2/7P/6q1/1b1N2N1/5nQ1 w - - 0 1)

Duverge, Josef FA

Source?, 1905

1B3K2/3p2p1/1p1R4/4kp2/7P/6q1/1b1N2N1/5nQ1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qd4#
    • 1...Ba3
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...b5
      • 2.Qc5#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Re6#
      • 1...Kxf4
        • 2.Rd4#
      • 1...Qxf4
        • 2.Qxg7#
      • 1...Qxg1
        • 2.Sd3#
      • 1...Qf2
        • 2.Sd3#
        • 2.Sg6#
      • 1...Qa3
        • 2.Sg6#
      • 1...Qe3
        • 2.Sg6#
      • 1...Ba3
        • 2.Qd4#
      • 1...Se3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAB1(A)
    • B(b);N_GUARD,P_PINR(E)::QAB1(A)
    • B(b);N_GUARD::QAB1(A),XB(b)
    • P(f);N_GUARD::QAR2(A)
  • Actual
    • S(C);
    • Threat
      • B(F)+R(E),DCHECK
    • Vars
      • K(d);S_FLIGHT,XS(C)::B(F)+R(E),DCHECK
      • Q(c);OGATE,SBLOCK,XS(C)::QAB(A),XP(h)
      • Q(c);N_GUARD,XQ(A)::S(C)
      • Q(c);N_GUARD,P_PINR(E)::S(C)
      • Q(c);N_GUARD::S(C)
      • B(b);N_GUARD,P_PINR(E)::QAB1(A)
      • S(a);S_CUTQ(c)::S(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).