MESON Chess Problem Database

Problem Display
PID: 132037 (3Rr3/p3p3/Qp6/1nk1K1N1/1pb1p3/pB6/1pR2n2/5qB1 w - - 0 1)

Casa, Alex

Die Schwalbe, 1952

3Rr3/p3p3/Qp6/1nk1K1N1/1pb1p3/pB6/1pR2n2/5qB1

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Rxc4#
    • 1...Qh3
      • 2.Rxc4#
    • 1...Qa1
      • 2.Rxc4#
    • 1...Qb1
      • 2.Rxc4#
    • 1...Qd1
      • 2.Rxc4#
    • 1...Qe1
      • 2.Rxc4#
    • 1...Qxg1
      • 2.Rxc4#
  • Tries
    • 1.Rc8+?
      • 1...Sc7
        • 2.Rxc7#
      • 1...Rxc8!
  • Keys
    • 1.Ba4!
      • threat
        • 2.Qxb5#
      • 1...Kc6
        • 2.Qc8#
      • 1...Sc3
        • 2.Qc8#
      • 1...Sd4
        • 2.Rd5#
      • 1...Sd6
        • 2.Se6#
      • 1...Sc7
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::R1(B),XB(f)
    • Q(a);N_GUARD,N_SPINS(c),XB(A)::R1(B),XB(f)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(h);N_GUARD::R(G),XS(h)
      • Refutation
        • R(m);XR(G)
  • Actual
    • B(C);
    • Threat
      • QAR1(F),XS(h)
    • Vars
      • K(i);N_SPINS(c),P-FLIGHT,P_SPINP(j),P_SPINS(h)::QAR2(F)
      • S(h);N_GUARD,N_SPINB(f)::QAR(F)
      • S(h);N_SPINS(c)::R1(G)
      • S(h);::S(E)
      • S(h);::S(E),XP(g)
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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).