MESON Chess Problem Database

Problem Display
PID: 281715 (1Qr5/1N6/3p4/BB1p1b2/n2k1K2/8/3P4/3R4 w - - 0 1)

Cabrera, Virginio

Best Problems, 2025

1Qr5/1N6/3p4/BB1p1b2/n2k1K2/8/3P4/3R4

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qh8#
    • 1...Rc2
      • 2.Qh8#
    • 1...Rc3
      • 2.Qh8#
      • 2.dxc3#
    • 1...Rc5
      • 2.Qh8#
    • 1...Rc6
      • 2.Qh8#
    • 1...Rh8
      • 2.Qxh8#
    • 1...Sc3
      • 2.dxc3#
    • 1...Sc5
      • 2.Bc3#
  • Tries
    • 1.Bc3+?
      • 1...Rxc3
        • 2.Qh8#
      • 1...Sxc3!
    • 1.Qxd6?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Rc6
        • 2.Qe5#
      • 1...Re8
        • 2.Qb4#
      • 1...Rf8
        • 2.Qb4#
        • 2.Qe5#
      • 1...Be6
        • 2.Qe5#
      • 1...Rc4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sb3#
      • 1...Kxc5
        • 2.d4#
      • 1...Rxc5
        • 2.Qh8#
      • 1...Sxc5
        • 2.Bc3#
      • 1...dxc5
        • 2.Qe5#
      • 1...Bc2
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);OGATE::QAB(G)
    • R(f);OGATE::QAB(G),XR(f)
    • S(a);OGATE::R(A)+P(B)DCHECK,XS(a)
    • S(a);N_GUARD,S_CUTR(f)::B(D)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • R(f);OGATE,XB(D)::QAB(G)
      • Refutation
        • S(a);XB(D)
    • Try
      • Q(G);P_PINP(c),XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::QAB1(G)
        • R(f);N_GUARD::QAR2(G)
        • B(d);::QAB1(G)
      • Refutation
        • R(f);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(b);OGATE,S_FLIGHT,XS(F)::P(B)
      • R(f);OGATE,SBLOCK,XS(F)::QAB(G)
      • S(a);N_GUARD,SBLOCK,XS(F)::B(D)
      • P(e);OGATE,SBLOCK,XS(F)::QAB1(G)
      • B(d);N_GUARD::S(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).