MESON Chess Problem Database

Problem Display
PID: 268319 (6BK/1Q1p1N2/8/p2P4/2krP1NR/2bpB3/P2P4/1nR5 w - - 0 1)

Cristoffanini, Guido

Xadrez Brasileiro, 1935

6BK/1Q1p1N2/8/p2P4/2krP1NR/2bpB3/P2P4/1nR5

#2

12 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4+
      • 2.Sge5#
    • 1...Rxd5+
      • 2.Sfe5#
    • 1...Sa3
      • 2.Rxc3#
  • Tries
    • 1.Qxb1?
      • threat
        • 2.Rxc3#
      • 1...Kc5
        • 2.Rxc3#
      • 1...Rxe4+!
    • 1.Qb6?
      • threat
        • 2.Sge5#
        • 2.Sfe5#
        • 2.Sd6#
      • 1...Rxd5+
        • 2.Sfe5#
      • 1...d6
        • 2.Sxd6#
      • 1...Rxe4+!
  • Keys
    • 1.a4!
      • threat
        • 2.Qb5#
      • 1...Rxe4+
        • 2.Sge5#
      • 1...Rxd5+
        • 2.Sfe5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Sa3
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,XP(E)::S(F)
    • R(e);CHECK,XP(H)::S(J)
    • S(a);N_GUARD::R1(A),XB(b)
  • Tries
    • Try
      • Q(I);XS(a)
      • Threat
        • R1(A),XB(b)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(e)::R(A),XB(b)
      • Refutation
        • R(e);CHECK,XP(E)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • R(e);CHECK,XP(H)::S(J)
        • P(g);::S(J),XP(g)
      • Refutation
        • R(e);CHECK,XP(E)
  • Actual
    • P(B);
    • Threat
      • QAB1(I)
    • Vars
      • R(e);CHECK,XP(E)::S(F)
      • R(e);CHECK,XP(H)::S(J)
      • K(d);P-FLIGHT,P_SPINR(e)::QAR1(I)
      • S(a);N_GUARD::R1(A),XB(b)
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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).