MESON Chess Problem Database

Problem Display
PID: 51443 (4q3/1Bp3p1/4p3/n1B2p1r/PP6/1p1kN2p/3P2Qn/3K1b2 w - - 0 1)

Morra, Juan Carlos

The Guardian, 1960

4q3/1Bp3p1/4p3/n1B2p1r/PP6/1p1kN2p/3P2Qn/3K1b2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Be2+
      • 2.Qxe2#
    • 1...Sf3
      • 2.Qxf1#
    • 1...Sg4
      • 2.Qxf1#
    • 1...Sc6
      • 2.Ba6#
    • 1...f4
      • 2.Be4#
      • 2.Qe4#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Sxf1?
      • threat
        • 2.Qe2#
      • 1...Kc4
        • 2.Qe2#
      • 1...hxg2!
    • 1.Ba6+?
      • 1...Sc4
        • 2.Bxc4#
      • 1...Qb5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Se5#
      • 1...Be2+
        • 2.Qxe2#
      • 1...Kc4
        • 2.Se5#
      • 1...Sxg4
        • 2.Qxf1#
      • 1...fxg4
        • 2.Qe4#
      • 1...Sf3
        • 2.Qxf1#
      • 1...Sc4
        • 2.Sf2#
      • 1...Sc6
        • 2.Ba6#
      • 1...f4
        • 2.Qe4#
      • 1...e5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
    • S(b);N_GUARD::QAB(C),XB(a)
    • S(f);N_GUARD,S_CUTQ(l)::B(H)
    • P(i);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(D);XB(a)
      • Threat
        • QAB1(C)
      • Vars
        • K(d);S_FLIGHT::QAB(C)
      • Refutation
        • P(e);XQ(C)
    • Try
      • B(H);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::B(H),XS(f)
      • Refutation
        • Q(l);P_SPINQ(l)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
      • K(d);S_FLIGHT::S(D)
      • S(b);N_GUARD,XS(D)::QAB(C),XB(a)
      • P(g);N_GUARD,XS(D)::QAB1(C)
      • S(b);N_GUARD::QAB(C),XB(a)
      • S(f);SBLOCK::S(D)
      • S(f);N_GUARD,S_CUTQ(l)::B(H)
      • P(g);N_GUARD::QAB1(C)
      • P(i);N_GUARD::QAR2(C)
HTML5 logo

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).