MESON Chess Problem Database

Problem Display
PID: 16845 (7b/p2R2B1/rp4p1/pr4pp/PRb1NkBP/2N1p1pP/8/K7 w - - 0 1)

Ekstrom, Sven Johan Adrian

Froberg, Johan Hilding Laurentius

1/2 Prize, Tidskrift for Schack, 1943

7b/p2R2B1/rp4p1/pr4pp/PRb1NkBP/2N1p1pP/8/K7

#2

10 + 13

45 Schach 1952
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Se2#
    • 1...Be2
      • 2.Sxe2#
    • 1...Bb3
      • 2.Se2#
    • 1...Bd5
      • 2.Se2#
    • 1...Be6
      • 2.Se2#
    • 1...Bf7
      • 2.Se2#
    • 1...Bg8
      • 2.Se2#
  • Tries
    • 1.Se2+?
      • 1...Kxe4
        • 2.Rxc4#
        • 2.Rd4#
      • 1...Bxe2!
    • 1.Rf7+?
      • 1...Bxf7
        • 2.Se2#
      • 1...Rf5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se2#
        • 2.Sd5#
        • 2.Sd3#
        • 2.Se6#
        • 2.Rxc4#
        • 2.Rd4#
        • 2.Rf7#
      • 1...Rxb4
        • 2.Rd4#
      • 1...Rxc5
        • 2.Rd4#
      • 1...Bxg7
        • 2.Sd3#
      • 1...axb4
        • 2.Rd4#
      • 1...gxh4
        • 2.Se6#
      • 1...hxg4
        • 2.Rf7#
      • 1...bxc5
        • 2.Rxc4#
      • 1...e2
        • 2.Sd5#
      • 1...g2
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 7
  • Sets
    • B(c);N_GUARD::S(B)
    • B(c);N_GUARD::S(B),XB(c)
  • Tries
    • Try
      • S(B);CHECK,P_SPINB(J)
      • Refutation
        • B(c);XS(B)
    • Try
      • R(I);CHECK
      • Vars
        • B(c);XR(I)::S(B)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(F);P_PINB(c)
    • Threat
      • DUALS(7)
    • Vars
      • R(f);N_SPINB(c),XR(E)::R(I)
      • R(f);XS(F)::R(I)
      • B(m);P_PINS(B),XB(J)::S(F)
      • P(e);N_SPINB(c),P_PINP(D),XR(E)::R(I)
      • P(g);XP(H)::S(F)
      • P(h);XB(G)::R(I)
      • P(j);XS(F)::R(E),XB(c)
      • P(a);::S(B)
      • P(b);::S(B)
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).