MESON Chess Problem Database

Problem Display
PID: 274786 (b7/4n2K/3r1p2/RN1pk1p1/1n2B1Qp/5R2/8/2N1B3 w - - 0 1)

Alaikov, Venelin

1st HM., Buletin Problemistic, 1984

b7/4n2K/3r1p2/RN1pk1p1/1n2B1Qp/5R2/8/2N1B3

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Sd3#
    • 1...Sc2
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sa6
      • 2.Sd3#
    • 1...Sbc6
      • 2.Sd3#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sec6
      • 2.Qf5#
    • 1...Sg6
      • 2.Qf5#
    • 1...Sc8
      • 2.Qf5#
    • 1...Sg8
      • 2.Qf5#
    • 1...h3
      • 2.Bg3#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Re3#
        • 2.Qd4#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sc2
        • 2.Sd3#
      • 1...Sbc6
        • 2.Sd3#
        • 2.Re3#
      • 1...Sec6
        • 2.Re3#
      • 1...d4!
    • 1.Rf5+?
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Ke6!
  • Keys
    • 1.Bxd5!
      • threat
        • 2.Qd4#
        • 2.Qe4#
      • 1...Kxd5
        • 2.Sa7#
      • 1...Rxd5
        • 2.Re3#
      • 1...Bxd5
        • 2.Bc3#
      • 1...Sbxd5
        • 2.Sd3#
      • 1...Sexd5
        • 2.Qf5#
      • 1...f5
        • 2.Qd4#
      • 1...Sc2
        • 2.Qe4#
      • 1...Sbc6
        • 2.Qe4#
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qxf5#
        • 2.Qe4#
      • 1...Sec6
        • 2.Rf5#
        • 2.Qf5#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(h);N_GUARD::QAR1(E),XS(h)
    • S(h);N_GUARD::QAR1(E)
    • P(b);N_GUARD::B(B)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);OGATE,XB(D)::QAR1(E),XS(h)
        • S(a);N_GUARD::S(A)
        • S(h);::R(C)
      • Refutation
        • P(c);
    • Try
      • R(C);CHECK
      • Vars
        • S(h);OGATE,XR(C)::QAR1(E),XS(h)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(D);XP(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P-FLIGHT,XB(D)::R(F)+S(G)
      • R(f);SBLOCK,XB(D)::R(C)
      • B(i);SBLOCK,XB(D)::B(B)
      • S(a);N_GUARD,SBLOCK,XB(D)::S(A)
      • S(h);N_GUARD,SBLOCK,XB(D)::QAR1(E)
      • P(g);::QAB1(E)
      • S(a);::QAR1(E)
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).