MESON Chess Problem Database

Problem Display
PID: 71069 (7Q/p2N1N2/r6B/pr5q/R1Pnk3/1B2p3/K1P4b/5R2 w - - 0 1)

Zarur, Almiro Elias

3rd HM., BCF, 1962

7Q/p2N1N2/r6B/pr5q/R1Pnk3/1B2p3/K1P4b/5R2

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sxf6#
    • 1...Bg1
      • 2.Rf4#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Bd6
      • 2.Sf6#
    • 1...Sxc2
      • 2.Bxc2#
  • Tries
    • 1.Qh7+?
      • 1...Qf5
        • 2.Sg5#
      • 1...Rf5
        • 2.Sc5#
      • 1...Rg6
        • 2.Sf6#
      • 1...Sf5
        • 2.cxb5#
      • 1...Qg6!
    • 1.Qa8+?
      • 1...Qd5
        • 2.Sg5#
      • 1...Rd5
        • 2.Sc5#
      • 1...Rc6
        • 2.Sf6#
      • 1...Sc6
        • 2.cxb5#
      • 1...Rb7!
  • Keys
    • 1.Qe8+!
      • 1...Qe5
        • 2.Sg5#
      • 1...Re5
        • 2.Sc5#
      • 1...Re6
        • 2.Sf6#
      • 1...Be5
        • 2.Rf4#
      • 1...Se6
        • 2.cxb5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD::S(H),XR(h)
    • B(a);N_GUARD::R1(A)
    • B(a);N_GUARD::R1(A),XB(a)
    • B(a);S_CUTR(h)::S(H)
    • S(c);OGATE,XP(C)::B(D),XS(c)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(I)
        • R(f);P_SPINR(f)::S(H)
        • R(h);P_SPINR(h)::S(H)
        • S(c);P_SPINS(c),S_CUTQ(g),S_CUTQ(g),S_CUTR(h)::R(E)+P(F),XR(f)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • Q(J);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(I)
        • R(f);P_SPINR(f)::S(H)
        • R(h);P_SPINR(h)::S(H)
        • S(c);P_SPINS(c),S_CUTQ(g),S_CUTR(h)::R(E)+P(F),XR(f)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(J);CHECK
    • Vars
      • Q(g);P_SPINQ(g)::S(I)
      • R(f);P_SPINR(f)::S(H)
      • R(h);P_SPINR(h)::S(H)
      • B(a);P_SPINB(a)::R1(A)
      • S(c);P_SPINS(c),S_CUTB(a),S_CUTQ(g),S_CUTR(h)::R(E)+P(F),XR(f)
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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).