MESON Chess Problem Database

Problem Display
PID: 200029 (4R2B/2pq4/2Pb4/1P1N1n2/K1P1P3/NpPk1B2/1pRP3Q/3nr3 w - - 0 1)

Petkov, Petko Andonov

Stella Polaris, 1966

4R2B/2pq4/2Pb4/1P1N1n2/K1P1P3/NpPk1B2/1pRP3Q/3nr3

#2

14 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Be2#
      • 2.Qe2#
    • 1...Rg1
      • 2.Be2#
      • 2.Qe2#
    • 1...Rh1
      • 2.Be2#
      • 2.Qe2#
    • 1...Re2
      • 2.Bxe2#
      • 2.Qxe2#
    • 1...Rxe4
      • 2.Bxe4#
    • 1...Bxh2
      • 2.Sb4#
    • 1...Bg3
      • 2.Sb4#
    • 1...Bb4
      • 2.Sxb4#
      • 2.Sf4#
    • 1...Bf4
      • 2.Sb4#
      • 2.Sxf4#
    • 1...Bc5
      • 2.Sf4#
    • 1...Be5
      • 2.Sb4#
    • 1...Be7
      • 2.Sf4#
    • 1...Bf8
      • 2.Sf4#
    • 1...Sxc3+
      • 2.Rxc3#
  • Keys
    • 1.c5!
      • threat
        • 2.Sb4#
      • 1...Rxe4+
        • 2.Bxe4#
      • 1...Sxc3+
        • 2.Rxc3#
      • 1...Bxc5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(b);OGATE,P_PINP(H),XP(I)::B(F),XR(b)
    • B(g);N_GUARD,XQ(C)::S(K)
    • B(g);N_GUARD::S(K)
    • S(a);CHECK,OGATE,XP(E)::R1(A),XS(a)
  • Actual
    • P(H);
    • Threat
      • S(K)
    • Vars
      • R(b);CHECK,OGATE,XP(I)::B(F),XR(b)
      • S(a);CHECK,OGATE,XP(E)::R1(A),XS(a)
      • B(g);N_GUARD,XP(H)::S(K)
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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).