MESON Chess Problem Database

Problem Display
PID: 258542 (6B1/3N4/1pppp1rp/1r1k1nnR/1p6/1PP5/Q2N4/1K2R1b1 w - - 0 1)

Simansky, AC

Die Schwalbe, 1931

6B1/3N4/1pppp1rp/1r1k1nnR/1p6/1PP5/Q2N4/1K2R1b1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sxb6#
    • 1...Bd4
      • 2.c4#
    • 1...Sd4
      • 2.c4#
    • 1...Sh3
      • 2.Rxf5#
    • 1...Se4
      • 2.Rxf5#
    • 1...Sh7
      • 2.Rxf5#
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.Bxe6+?
      • 1...Sxe6
        • 2.Rxf5#
      • 1...Rxe6!
  • Keys
    • 1.Re4!
      • threat
        • 2.c4#
      • 1...Sxe4
        • 2.Rxf5#
      • 1...bxc3
        • 2.b4#
      • 1...c5
        • 2.Qa8#
      • 1...Rc5
        • 2.Sxb6#
      • 1...Se3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD,SBLOCK,S_CUTB(a)::S(H),XP(g)
    • B(a);SBLOCK::P(F)
    • S(e);P_SPINS(f),SBLOCK::P(F)
    • S(f);OGATE,P_SPINS(e)::R(G),XS(e)
    • P(h);OGATEB::QAB(C)
  • Tries
    • Try
      • B(I);CHECK,XP(j)
      • Vars
        • S(f);OGATE,P_SPINS(e),XB(I)::R(G),XS(e)
      • Refutation
        • R(k);XB(I)
  • Actual
    • R(B);
    • Threat
      • P(F)
    • Vars
      • S(f);OGATE,P_SPINS(e),XR(B)::R(G),XS(e)
      • P(b);OGATE,P_PINP(E),XP(F)::QAB(C)+P(E)
      • P(h);OGATEB::QAB(C)
      • R(c);N_GUARD,SBLOCK,S_CUTB(a)::S(H),XP(g)
      • S(e);N_GUARD,P_SPINS(f),S_CUTB(a)::R1(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).