MESON Chess Problem Database

Problem Display
PID: 198262 (6bq/4p3/pN4pb/7R/Rn1nk1r1/r5Bp/B3PQ2/3N3K w - - 0 1)

Roura, Juan R

Rivista del Club Argentino de Ajedrez, 1920

6bq/4p3/pN4pb/7R/Rn1nk1r1/r5Bp/B3PQ2/3N3K

#2

9 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qh7
      • 2.Re5#
    • 1...Rxa2
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rxa4
      • 2.Sc3#
    • 1...Rg5
      • 2.Qf4#
    • 1...Bb3
      • 2.Sc3#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sb3
      • 2.Bb1#
    • 1...Se6
      • 2.Bd5#
  • Tries
    • 1.Qe3+?
      • 1...Rxe3
        • 2.Sf2#
      • 1...Bxe3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sc5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rg5
        • 2.Qf4#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sb3
        • 2.Bb1#
      • 1...Se6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(l);N_GUARD::R1(H),XQ(l)
    • Q(l);N_GUARD::R1(H)
    • R(a);N_GUARD,XB(C)::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • R(a);N_GUARD,XR(G)::S(A)
    • R(f);N_GUARD,S_CUTB(i)::QAR1(E)
    • B(k);S_CUTR(a)::S(A)
    • S(c);P_SPINS(d),S_CUTR(a)::QAB1(E)
    • S(d);N_GUARD,P_SPINS(c),S_CUTR(a)::B(C)
    • S(d);P_SPINS(c),S_CUTB(k)::B(C)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);SBLOCK,XQ(E)::S(A)
      • Refutation
        • B(i);XQ(E)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • Q(l);N_GUARD::R1(H),XQ(l)
      • R(a);N_GUARD::S(A),XR(a)
      • R(f);N_GUARD,S_CUTB(i)::QAR1(E)
      • S(c);P_SPINS(d),S_CUTR(a)::QAB1(E)
      • S(d);N_GUARD,P_SPINS(c),S_CUTR(a)::B(C)
      • S(d);P_SPINS(c),S_CUTB(k)::B(C)
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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).