MESON Chess Problem Database

Problem Display
PID: 6722 (2Bn4/2R5/1p1k2qR/1P1Np2b/2P3p1/3Q2p1/1p4P1/bK6 w - - 0 1)

Larsen, Karl Adolf Koefoed

1st Place=, Match: Denmark - Poland, 1933

2Bn4/2R5/1p1k2qR/1P1Np2b/2P3p1/3Q2p1/1p4P1/bK6

#2

9 + 10

4035 Aarsskrift for DSK 1934
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qa3#
    • 1...Qf6
      • 2.Qa3#
    • 1...Qxh6
      • 2.Qa3#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Se6
      • 2.Rc6#
    • 1...Sb7
      • 2.Rc6#
    • 1...Sf7
      • 2.Rc6#
    • 1...e4
      • 2.Qxg3#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Qa3#
      • 1...Sc6
        • 2.Rxc6#
      • 1...e4
        • 2.Qxg3#
      • 1...Sb7
        • 2.Rc6#
      • 1...Se6!
    • 1.Rxg6+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Rc6#
        • 2.Qa3#
      • 1...Bxg6!
    • 1.Qxg6+?
      • 1...Se6
        • 2.Rc6#
        • 2.Qxe6#
      • 1...Bxg6+!
  • Keys
    • 1.Qf5!
      • 1...Qxh6
        • 2.Qd7#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Se6
        • 2.Rc6#
      • 1...Qe6
        • 2.Qf8#
      • 1...Qf6
        • 2.Qd7#
      • 1...Sb7
        • 2.Rc6#
      • 1...Sf7
        • 2.Rc6#
      • 1...e4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(i);N_PINQ(C)::QAB(C)
    • Q(i);N_PINQ(C),N_SPINQ(i),XR(G)::QAB(C)
    • S(j);N_GUARD::R1(H),XS(j)
    • S(j);N_GUARD,N_SPINQ(i)::R1(H)
    • S(j);N_GUARD::R1(H)
    • P(e);N_PINQ(C)::QAB(C),XP(c)
  • Tries
    • Try
      • B(I);N_SPINQ(C)
      • Threat
        • QAB(C)
      • Vars
        • S(j);N_GUARD::R1(H),XS(j)
        • P(e);OGATEB::QAB(C),XP(c)
        • S(j);N_GUARD::R1(H)
      • Refutation
        • S(j);N_SPINQ(i)
    • Try
      • R(G);CHECK,N_SPINQ(C),XQ(i)
      • Refutation
        • B(f);P_PINQ(C),XR(G)
    • Try
      • Q(C);CHECK,N_SPINQ(C),XQ(i)
      • Refutation
        • B(f);CHECK,P_SPINB(f),XQ(C)
  • Actual
    • Q(C);
    • Vars
      • Q(i);N_PINQ(C),N_SPINQ(i),XR(G)::QAR1(C)
      • S(j);N_GUARD::R1(H),XS(j)
      • S(j);N_GUARD,N_SPINQ(i)::R1(H)
      • Q(i);N_PINQ(C)::QAB(C)
      • Q(i);N_PINQ(C)::QAR1(C)
      • S(j);N_GUARD::R1(H)
      • P(e);N_PINQ(C)::QAB(C)
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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).