MESON Chess Problem Database

Problem Display
PID: 258066 (R5b1/2kN4/2P2p1K/P1QprB2/2n2n2/4N3/r2b3B/8 w - - 0 1)

Boros, Sandor

Die Schwalbe, 1931

R5b1/2kN4/2P2p1K/P1QprB2/2n2n2/4N3/r2b3B/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sxd5#
    • 1...Sb6
      • 2.axb6#
    • 1...Sd6
      • 2.Qb6#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Rc8#
        • 2.Qe7#
      • 1...Rxa5
        • 2.Rc8#
      • 1...Bxa5
        • 2.Rc8#
      • 1...Sxa5
        • 2.Rc8#
      • 1...Sxe5
        • 2.Rc8#
      • 1...fxe5
        • 2.Rc8#
      • 1...Bb4
        • 2.Rc8#
      • 1...Sb6
        • 2.axb6#
      • 1...Sd6
        • 2.Qb6#
      • 1...Se6
        • 2.Qe7#
      • 1...Sg6
        • 2.Rc8#
      • 1...Be6!
    • 1.Sb8?
      • threat
        • 2.Sa6#
      • 1...Kd8
        • 2.Sa6#
      • 1...Rxa5!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Rc8#
      • 1...Rxf5
        • 2.Se8#
      • 1...Be6
        • 2.Se8#
      • 1...Re6
        • 2.Sxd5#
      • 1...Re8
        • 2.Sxe8#
      • 1...Sb6
        • 2.axb6#
      • 1...Sd6
        • 2.Qb6#
      • 1...Se6
        • 2.Sxd5#
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,P_SPINS(d),S_CUTB(i)::S(B),XP(e)
    • S(c);OGATE::P(C),XS(c)
    • S(c);N_GUARD,SBLOCK::QAB1(D)
  • Tries
    • Try
      • S(H);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(C)::R1(I)
        • B(b);XP(C)::R1(I)
        • S(c);XP(C)::R1(I)
        • S(c);XS(H)::R1(I)
        • P(g);XS(H)::R1(I)
        • B(b);::R1(I)
        • S(c);OGATE::P(C),XS(c)
        • S(c);N_GUARD,SBLOCK::QAB1(D)
        • S(d);P_PINS(B)::QAR2(D)
        • S(d);P_PINS(B)::R1(I)
      • Refutation
        • B(i);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • K(h);S_FLIGHT::R(I)+S(H)
      • Refutation
        • R(a);XP(C)
  • Actual
    • S(H);XP(g)
    • Threat
      • R1(I)
    • Vars
      • R(f);N_GUARD,P_SPINS(d),XB(E)::S(H)
      • B(i);S_CUTR(f)::S(H)
      • R(f);N_GUARD,P_PINS(H),P_SPINS(d),S_CUTB(i)::S(B),XP(e)
      • R(f);N_GUARD,P_SPINS(d)::S(H),XR(f)
      • S(c);OGATE::P(C),XS(c)
      • S(c);N_GUARD,SBLOCK::QAB1(D)
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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).