MESON Chess Problem Database

Problem Display
PID: 21762 (6RB/K7/1R2Q3/3p3p/2n2kB1/p3N1n1/3r4/1b1r1Nb1 w - - 0 1)

Larsen, Karl Adolf Koefoed

2nd Prize, Revista Argentina, 1920

6RB/K7/1R2Q3/3p3p/2n2kB1/p3N1n1/3r4/1b1r1Nb1

#2

8 + 10

3360 Simple Two-move Themes 1924
15593 170 Skakopgaver (Jorgensen) 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Sxg2#
    • 1...Rd3
      • 2.Sg2#
    • 1...Rd4
      • 2.Sg2#
    • 1...Bd3
      • 2.Sxd5#
    • 1...Be4
      • 2.Qh6#
    • 1...Bf2
      • 2.Sg2#
    • 1...Se2
      • 2.Sg2#
    • 1...Se4
      • 2.Qf5#
    • 1...Sb2
      • 2.Qe5#
    • 1...Sxe3
      • 2.Qe5#
    • 1...Sa5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sxb6
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...d4
      • 2.Sd5#
    • 1...hxg4
      • 2.Qxg4#
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qe5#
      • 1...Bxe3+
        • 2.Qxe3#
      • 1...hxg4
        • 2.Qxg4#
      • 1...Rd4
        • 2.Sg2#
      • 1...Be4
        • 2.Qh6#
      • 1...Se4
        • 2.Qf5#
      • 1...d4
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(d);N_GUARD::S(B),XR(d)
    • R(d);N_GUARD::S(B)
    • B(a);S_CUTR(d)::S(B),XP(i)
    • B(a);SBLOCK::QAB(E)
    • B(c);S_CUTR(d)::S(B)
    • S(f);S_CUTR(d)::S(B)
    • S(f);N_GUARD,S_CUTB(a)::QAR1(E)
    • S(g);N_GUARD::QAB1(E)
    • S(g);N_GUARD,XS(B)::QAB1(E)
    • S(g);N_GUARD::QAB1(E),XS(g)
    • S(g);N_GUARD,XR(D)::QAB1(E)
    • P(i);S_CUTR(d)::S(B)
    • P(j);OGATE,XB(C)::QAR1(E),XP(j)
  • Actual
    • R(D);P_PINS(g),P_SPINS(B)
    • Threat
      • QAB1(E)
    • Vars
      • B(c);CHECK,OGATE,XS(B)::QAB1(E),XB(c)
      • P(j);OGATE,XB(C)::QAR1(E),XP(j)
      • R(d);N_PINS(B),N_SPINS(g)::S(B)
      • B(a);N_SPINS(g),SBLOCK::QAB(E)
      • S(f);N_GUARD,N_SPINS(g),S_CUTB(a)::QAR1(E)
      • P(i);N_PINS(B),N_SPINS(g)::S(B)
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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).