MESON Chess Problem Database

Problem Display
PID: 140050 (2NB2n1/1p5K/2k2pN1/3b1Qp1/PP2n2R/5B2/2q3rb/3rR3 w - - 0 1)

Larsen, Karl Adolf Koefoed

Revista Romana de Sah, 1930

2NB2n1/1p5K/2k2pN1/3b1Qp1/PP2n2R/5B2/2q3rb/3rR3

#2

10 + 11

56 The Problemist 1938
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Sa7#
    • 1...Ba2
      • 2.Qb5#
      • 2.b5#
    • 1...Bb3
      • 2.Qb5#
      • 2.b5#
    • 1...Be6
      • 2.Qb5#
    • 1...Bf7
      • 2.Qb5#
      • 2.b5#
    • 1...Sd2
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...Sc3
      • 2.Rc4#
    • 1...Sg3
      • 2.Qe6#
    • 1...Sc5
      • 2.b5#
    • 1...Sd6
      • 2.Sa7#
    • 1...Sh6
      • 2.Sge7#
    • 1...Se7
      • 2.Sgxe7#
  • Tries
    • 1.Qe6+?
      • 1...Bd6
        • 2.Sa7#
        • 2.Qe8#
      • 1...Sd6
        • 2.Sa7#
      • 1...Bxe6!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Qd7#
      • 1...Ba2
        • 2.Qb5#
        • 2.b5#
      • 1...Bb3
        • 2.Qb5#
        • 2.b5#
      • 1...Bc4
        • 2.Qc5#
      • 1...Be6
        • 2.Qb5#
        • 2.b5#
      • 1...Bf7
        • 2.Qb5#
        • 2.b5#
      • 1...Sd2
        • 2.Bxd5#
      • 1...Sf2
        • 2.Qxc2#
      • 1...Sc3
        • 2.Rc4#
      • 1...Sg3
        • 2.Re6#
      • 1...Sc5
        • 2.b5#
      • 1...Sd6
        • 2.Sa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(d);SBLOCK::S(I)
    • B(f);OGATE,P_SPINS(e)::QAB1(F)
    • S(e);OGATE,P_SPINB(f)::R(E)
    • S(e);N_GUARD,P_SPINB(f),S_CUTB(d)::QAR2(F)
    • S(e);P_SPINB(f),SBLOCK::P(D)
    • S(e);P_SPINB(f),SBLOCK::S(I)
    • S(k);N_GUARD::S(G)
    • S(k);N_GUARD::S(G),XS(k)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(e);P_PINS(G),P_SPINB(f),P_SPINS(e)::S(I)
      • Refutation
        • B(f);P_SPINS(e),XQ(F)
  • Actual
    • S(G);
    • Threat
      • QAB1(F)
    • Vars
      • B(f);OGATE,P_SPINS(e)::QAR1(F)
      • S(e);OGATE,P_PINQ(F),P_SPINB(f)::B(B),XB(f)
      • S(e);OGATE,P_PINQ(F),P_SPINB(f)::QAR(F),XQ(b)
      • S(e);OGATE,P_PINQ(F),P_SPINB(f)::R(E)
      • S(e);OGATE,P_PINQ(F),P_SPINB(f)::R(A)
      • S(e);P_PINQ(F),P_SPINB(f),SBLOCK::P(D)
      • S(e);P_PINQ(F),P_SPINB(f),SBLOCK::S(I)
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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).