MESON Chess Problem Database

Problem Display
PID: 61827 (8/1K5b/B3p1n1/R1NkP2Q/1p1N4/r1p3R1/n1Pp3b/6Bq w - - 0 1)

Morra, Juan Carlos

Het Belgisch Schaakbord (L'Echiquier Belge), 1956

8/1K5b/B3p1n1/R1NkP2Q/1p1N4/r1p3R1/n1Pp3b/6Bq

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sa4#
  • Tries
    • 1.Sd3+?
      • 1...Ke4
        • 2.Qe2#
      • 1...Rxa5!
    • 1.Scxe6+?
      • 1...Ke4
        • 2.Bd3#
        • 2.Re3#
        • 2.Qe2#
        • 2.Qf5#
      • 1...Rxa5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Rd3#
      • 1...Qxg1
        • 2.Qf3#
      • 1...Bxg1
        • 2.Qxh1#
      • 1...Bxg3
        • 2.Qxh1#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qe4
        • 2.Sa4#
      • 1...Sc1
        • 2.Sxb4#
      • 1...Sf4
        • 2.Se7#
      • 1...Sh4
        • 2.Se7#
      • 1...Se7
        • 2.Sxe7#
      • 1...Sf8
        • 2.Se7#
      • 1...Sh8
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::R(E)+S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(h);S_FLIGHT::QAR2(H)
      • Refutation
        • R(e);XR(E)
    • Try
      • S(F);CHECK,XP(i)
      • Refutation
        • R(e);XR(E)
  • Actual
    • S(D);
    • Threat
      • R(C)
    • Vars
      • Q(a);N_GUARD,XB(A)::QAB(H)
      • B(d);OGATE,XB(A)::QAB(H),XQ(a)
      • B(d);OGATE,XR(C)::QAB(H),XQ(a)
      • S(j);OGATE,P_SPINS(j),XP(G)::QAR1(H),XS(j)
      • P(c);OGATEB::QAR(H),XQ(c)
      • P(c);OGATEB::QAR(H),XR(c)
      • Q(a);N_GUARD::QAB(H),XQ(a)
      • Q(a);SBLOCK::R(E)+S(F)
      • S(b);N_GUARD::S(D),XP(g)
      • S(j);N_GUARD::S(D)
      • S(j);N_GUARD::S(D),XS(j)
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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).