MESON Chess Problem Database

Problem Display
PID: 273497 (1B6/p5bb/2NR3p/q1pp1p1B/R1n1nk2/3P1N2/4p2K/6Q1 w - - 0 1)

Storm, Fredrik

Schackvarlden, 1940

1B6/p5bb/2NR3p/q1pp1p1B/R1n1nk2/3P1N2/4p2K/6Q1

#2

9 + 12

15601 Albrecht-Leiss-Degener Collection 2023
5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qg3#
    • 1...Sb6
      • 2.Rf6#
    • 1...Sc3
      • 2.Qc1#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sh3#
        • 2.Se6#
      • 1...Sxg5
        • 2.Qg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Bg8
        • 2.Sh3#
      • 1...hxg5!
    • 1.Rf6+?
      • 1...Se5
        • 2.Bxe5#
      • 1...Scd6
        • 2.Bxd6#
      • 1...Sed6
        • 2.Bxd6#
      • 1...Qc7!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sxd5#
      • 1...Bg8
        • 2.Sg6#
      • 1...Se3
        • 2.Qg3#
      • 1...Sb6
        • 2.Rf6#
      • 1...Sc3
        • 2.Qc1#
      • 1...Sf6
        • 2.Rb6#
      • 1...d4
        • 2.Sd5#

This anticipates 133049(1960)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);P_SPINS(c),SBLOCK::QAB1(A)
    • S(b);N_GUARD,P_SPINS(c),S_CUTQ(e)::B(I)+R(H)
    • S(c);N_GUARD,P_SPINS(b),S_CUTQ(e)::QAB(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD,P_SPINS(b),XS(D)::QAB1(A)
        • S(c);N_GUARD,P_SPINS(b)::QAB1(A)
        • B(l);::S(D)
      • Refutation
        • P(i);XS(D)
    • Try
      • R(H);CHECK,P_PINP(h)
      • Vars
        • S(b);N_GUARD,P_SPINS(c)::B(I),XS(b)
        • S(c);N_GUARD,P_SPINS(b)::B(I),XS(c)
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • S(G);
    • Threat
      • S(G),XP(g)
    • Vars
      • B(l);N_GUARD::S(G)
      • S(b);P_SPINS(c),SBLOCK::QAB1(A)
      • S(b);N_GUARD,P_SPINS(c),S_CUTQ(e)::B(I)+R(H)
      • S(c);N_GUARD,P_SPINS(b),S_CUTQ(e)::QAB(A)
      • S(c);N_GUARD,P_SPINS(b),S_CUTB(k)::B(I)+R(H)
      • P(g);::S(G)
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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).