MESON Chess Problem Database

Problem Display
PID: 229115 (B4nq1/8/K2P4/3P4/p1N1k1P1/2Q1bp1N/4rrn1/4R3 w - - 0 1)

Filaretov, Sergei P

3rd HM., Shakhmaty, 1926

B4nq1/8/K2P4/3P4/p1N1k1P1/2Q1bp1N/4rrn1/4R3

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.dxe6#
    • 1...Bd2
      • 2.Sxd2#
    • 1...Bd4
      • 2.Qc2#
    • 1...Bf4
      • 2.Sxf2#
    • 1...Bc5
      • 2.Sd2#
    • 1...Bb6
      • 2.Sd2#
    • 1...Ba7
      • 2.Sd2#
  • Keys
    • 1.d7!
      • threat
        • 2.Sd6#
      • 1...Qe6+
        • 2.dxe6#
      • 1...Qg6+
        • 2.d6#
      • 1...Bd4
        • 2.Qc2#
      • 1...Bf4
        • 2.Sxf2#
      • 1...Bc5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(i);OGATE,P_PINP(H)::B(I)+P(F),XQ(i)
    • B(d);N_GUARD,P_SPINR(a)::S(D),XB(d)
    • B(d);P_SPINR(a),SBLOCK::QAB(B)
    • B(d);N_GUARD,P_SPINR(a),SBLOCK::S(C),XR(b)
    • B(d);N_GUARD,P_SPINR(a)::S(D)
  • Actual
    • P(H);
    • Threat
      • S(D)
    • Vars
      • Q(i);CHECK,OGATE::B(I)+P(F),XQ(i)
      • Q(i);CHECK,N_GUARD::B(I)+P(F)
      • B(d);P_SPINR(a),SBLOCK::QAB(B)
      • B(d);N_GUARD,P_SPINR(a),SBLOCK::S(C),XR(b)
      • B(d);N_GUARD,P_SPINR(a)::S(D)
HTML5 logo

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).