MESON Chess Problem Database

Problem Display
PID: 169838 (2R5/n7/8/3B2R1/n1Nk2p1/Q7/N1p3r1/2K2bb1 w - - 0 1)

Morra, Juan Carlos

Caissa, 1945

2R5/n7/8/3B2R1/n1Nk2p1/Q7/N1p3r1/2K2bb1

#2

7 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Qe3#
    • 1...Bxc4
      • 2.Rxc4#
    • 1...Bh2
      • 2.Qe3#
    • 1...Be3+
      • 2.Qxe3#
    • 1...Sb2
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sc5
      • 2.Qc3#
    • 1...Sb6
      • 2.Qc3#
  • Tries
    • 1.Rxg4+?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Rxg4!
  • Keys
    • 1.Sb4!
      • 1...Be3+
        • 2.Qxe3#
      • 1...Bxc4
        • 2.Rxc4#
      • 1...Sxc8
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Rd2
        • 2.Rxg4#
      • 1...Re2
        • 2.Qd3#
      • 1...Rf2
        • 2.Qe3#
      • 1...Rh2
        • 2.Rxg4#
      • 1...Rg3
        • 2.Sxc2#
      • 1...Be2
        • 2.Sxc2#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bf2
        • 2.Sxc2#
      • 1...Bh2
        • 2.Qe3#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Sc3
        • 2.Qxa7#
      • 1...Sc5
        • 2.Qb2#
        • 2.Qa1#
      • 1...Sb6
        • 2.Qb2#
        • 2.Qa1#
      • 1...Sb5
        • 2.Sc6#
      • 1...g3
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • R(d);S_CUTB(b)::QAB1(C)
    • B(a);OGATE,XS(D)::R1(G),XB(a)
    • B(b);N_GUARD::QAB1(C)
    • B(b);CHECK,N_GUARD::QAB1(C),XB(b)
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD::QAB1(C),XS(e)
  • Tries
    • Try
      • R(F);CHECK,XP(g)
      • Vars
        • K(f);P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • R(d);XR(F)
  • Actual
    • S(B);
    • Vars
      • B(b);CHECK,N_GUARD::QAB1(C),XB(b)
      • B(a);OGATE,XS(D)::R1(G),XB(a)
      • S(h);N_GUARD,XR(G)::S(B)
      • S(h);N_GUARD::S(B),XS(h)
      • R(d);N_GUARD::R(F),XP(g)
      • R(d);S_CUTB(a)::QAR1(C)
      • R(d);S_CUTB(b)::QAB1(C)
      • R(d);N_GUARD::S(B),XP(c)
      • B(a);S_CUTR(d)::S(B),XP(c)
      • B(a);N_GUARD::QAR1(C),XB(a)
      • B(b);S_CUTR(d)::S(B),XP(c)
      • B(b);N_GUARD::QAB1(C)
      • S(e);N_GUARD::QAB(C),XS(e)
      • S(e);OGATE,SBLOCK::QAB(C),XS(h)
      • S(h);N_GUARD::S(B)
      • P(g);S_CUTR(d)::R(F)
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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).