MESON Chess Problem Database

Problem Display
PID: 59339 (bN5K/p6p/3Q4/B1p1p3/p1knq2R/r6r/2P1N3/1R3Bb1 w - - 0 1)

Mari, Alberto

2nd HM., Brisbane Courier, 1922

bN5K/p6p/3Q4/B1p1p3/p1knq2R/r6r/2P1N3/1R3Bb1

#2

9 + 12

56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qa6#
    • 1...Sb3
      • 2.Sg3#
    • 1...Sf3
      • 2.Sc3#
    • 1...Sc6
      • 2.Qe6#
  • Tries
    • 1.Qa6+?
      • 1...Kd5
        • 2.c4#
      • 1...Sb5!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qxc5#
      • 1...Qxc2
        • 2.Sxe5#
      • 1...Sxc2
        • 2.Sxe5#
      • 1...Sxe2
        • 2.Sxe5#
      • 1...Sb3
        • 2.Sg3#
      • 1...Qd5
        • 2.Qa6#
      • 1...Qc6
        • 2.Sxe5#
      • 1...Sf3
        • 2.Sc3#
      • 1...Sb5
        • 2.Sxe5#
      • 1...Sf5
        • 2.Sxe5#
      • 1...Sc6
        • 2.Qe6#
      • 1...Se6
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(g);P_SPINS(f),SBLOCK::QAB(G)
    • S(f);N_GUARD,P_SPINQ(g),S_CUTR(b)::B(B)+S(D)
    • S(f);N_GUARD,P_SPINQ(g),S_CUTR(c)::B(B)+S(D)
    • S(f);N_GUARD,P_SPINQ(g),S_CUTB(l)::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::P(C)
      • Refutation
        • S(f);P_SPINQ(g),P_SPINS(f)
  • Actual
    • S(H);
    • Threat
      • QAR1(G),XP(h)
    • Vars
      • Q(g);N_GUARD,P_SPINS(f),XP(C)::S(H),XP(i)
      • S(f);P_SPINQ(g),XP(C)::S(H),XP(i)
      • S(f);P_SPINQ(g),P_SPINS(f),XS(D)::S(H),XP(i)
      • S(f);N_GUARD,P_SPINQ(g),S_CUTR(b)::B(B)+S(D)
      • Q(g);P_SPINS(f),SBLOCK::QAB(G)
      • Q(g);N_GUARD,P_SPINS(f)::S(H),XP(i)
      • S(f);N_GUARD,P_SPINQ(g),S_CUTR(c)::B(B)+S(D)
      • S(f);P_SPINQ(g)::S(H),XP(i)
      • S(f);N_GUARD,P_SPINQ(g),S_CUTB(l)::QAB(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).