MESON Chess Problem Database

Problem Display
PID: 276166 (q7/n3br2/1N5p/1p2p2K/1R1P1kPR/4pp2/5N1P/n1Q5 w - - 0 1)

Simansky, AC

Die Schwalbe, 1933

q7/n3br2/1N5p/1p2p2K/1R1P1kPR/4pp2/5N1P/n1Q5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sh3#
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qb8
      • 2.Sd5#
    • 1...Qc8
      • 2.Sd5#
    • 1...Qe8
      • 2.Sd5#
    • 1...Qf8
      • 2.Sd5#
    • 1...Qg8
      • 2.Sd5#
    • 1...Qh8
      • 2.Sd5#
    • 1...Rf5+
      • 2.g5#
    • 1...Sc6
      • 2.Sd5#
    • 1...e4
      • 2.Sh3#
  • Tries
    • 1.d5+?
      • 1...e4
        • 2.Sd3#
        • 2.Rxe4#
      • 1...Bxb4!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxe5#
      • 1...Rf5+
        • 2.g5#
      • 1...Qe4
        • 2.Sh3#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Qb8
        • 2.Sd5#
      • 1...Qh8
        • 2.Sd5#
      • 1...Bd6
        • 2.Qxf7#
      • 1...Bf6
        • 2.d5#
      • 1...Sc6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(k);SBLOCK::S(B)
    • Q(k);N_GUARD::S(I),XQ(k)
    • Q(k);N_GUARD::S(I)
    • R(j);CHECK,SBLOCK::R(G)+P(F)
    • S(h);S_CUTQ(k)::S(I)
    • P(f);SBLOCK::S(B)
  • Tries
    • Try
      • P(E);CHECK
      • Refutation
        • B(i);XR(D)
  • Actual
    • Q(A);N_PINP(b),P_PINP(f)
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • R(j);CHECK,SBLOCK::R(G)+P(F)
      • Q(k);SBLOCK::S(B)
      • Q(k);N_GUARD::S(I),XQ(k)
      • Q(k);N_GUARD::S(I)
      • B(i);N_SPINP(f),OGATE::QAR(A),XR(j)
      • B(i);N_GUARD::R(D)+P(E)
      • S(h);S_CUTQ(k)::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).