MESON Chess Problem Database

Problem Display
PID: 267053 (3N4/4B1pq/Q1p4r/2nbkrnR/p5K1/1p1R1pP1/3N4/8 w - - 0 1)

Castellari, Umberto

4th HM., Sports Referee, 1932

(First published on Sat Feb 20 1932)

3N4/4B1pq/Q1p4r/2nbkrnR/p5K1/1p1R1pP1/3N4/8

#2

8 + 12

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4+
      • 2.gxf4#
    • 1...Be4
      • 2.Sc4#
    • 1...Be6
      • 2.Sxc6#
    • 1...Se4
      • 2.Sxf3#
    • 1...Se6
      • 2.Sf7#
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc3#
      • 1...Rf4+
        • 2.gxf4#
      • 1...Sce4
        • 2.Sc4#
      • 1...Sce6
        • 2.Sxc6#
      • 1...Sge4
        • 2.Sxf3#
      • 1...Sge6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);CHECK,OGATE,P_SPINS(h)::P(C),XR(g)
    • B(e);N_GUARD,SBLOCK::S(A)
    • B(e);N_GUARD,SBLOCK,S_CUTR(j)::S(H),XP(i)
    • S(h);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(e)::S(A),XP(b)
    • S(h);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(e)::S(H)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(g);CHECK,OGATE,P_SPINS(h)::P(C),XR(g)
      • S(d);P_SPINB(e),SBLOCK::S(A)
      • S(d);P_SPINB(e),SBLOCK,S_CUTR(j)::S(H),XP(i)
      • S(h);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(e)::S(A),XP(b)
      • S(h);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(e)::S(H)
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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).