MESON Chess Problem Database

Problem Display
PID: 287172 (5R2/8/2N3nB/8/3Nkn2/Q7/B6b/K6b w - - 0 1)

Morra, Juan Carlos

To Mat, 1954

5R2/8/2N3nB/8/3Nkn2/Q7/B6b/K6b

#2

7 + 5

15601 Albrecht-Leiss-Degener Collection 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qxf3#
    • 1...Se2
      • 2.Qe3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sh3
      • 2.Qe3#
    • 1...Sd5
      • 2.Bb1#
    • 1...Sh5
      • 2.Qe3#
    • 1...Se6
      • 2.Qe3#
  • Tries
    • 1.Re8+?
      • 1...Se6
        • 2.Qe3#
      • 1...Se5
        • 2.Rxe5#
      • 1...Se7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sd6#
      • 1...Se2
        • 2.Qe3#
      • 1...Sg2
        • 2.Qf3#
      • 1...Sd3
        • 2.Sc3#
      • 1...Sh3
        • 2.Qe3#
      • 1...Sd5
        • 2.Bb1#
      • 1...Sh5
        • 2.Qe3#
      • 1...Se6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB1(C),XB(a)
    • S(d);::QAR1(C)
    • S(d);S_CUTB(a)::QAB1(C)
    • S(d);N_GUARD,SBLOCK::B(B)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(d);P_SPINS(d)::QAR1(C)
        • S(e);N_GUARD,P_SPINS(e)::R1(G),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(d);::QAR1(C)
      • S(d);S_CUTB(a)::QAB1(C)
      • S(d);SBLOCK::S(D)
      • S(d);N_GUARD,SBLOCK::B(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).