MESON Chess Problem Database

Problem Display
PID: 204564 (2Q5/6b1/4NP2/3kp2R/4N1pK/5q1p/2P5/7B w - - 0 1)

Filaretov, Sergei P

64 Shakhmatnoe obozrenie, 1925

2Q5/6b1/4NP2/3kp2R/4N1pK/5q1p/2P5/7B

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.c4#
    • 1...Qa3
      • 2.c4#
    • 1...Qe3
      • 2.c4#
    • 1...Qf4
      • 2.c4#
    • 1...Qf5
      • 2.c4#
  • Tries
    • 1.Qd7+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...Kc4!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kxe6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sc3#
      • 1...Qf2+
        • 2.Sxf2#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Qxe4
        • 2.c4#
      • 1...Qc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(a);::P(B)
    • Q(a);N_SPINP(e)::P(B)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);N_SPINP(e),OGATE,P_SPINQ(a),S_FLIGHT,XS(C)::QAB1(H)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT,XS(F)
  • Actual
    • Q(H);
    • Threat
      • S(C)
    • Vars
      • Q(a);CHECK::B(A)+S(C),XQ(a)
      • Q(a);CHECK,XP(G)::B(A)+S(C),DCHECK,XQ(a)
      • B(f);CHECK,XP(G)::S(C),XB(f)
      • K(d);N_SPINP(e),P_SPINQ(a),S_FLIGHT,XS(C)::QAB1(H)
      • Q(a);P_SPINQ(a),XS(C)::P(B)
      • Q(a);::B(A)+S(C),DCHECK,XQ(a)
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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).