MESON Chess Problem Database

Problem Display
PID: 120931 (8/3K4/5N2/3Nk1b1/2p3P1/Q7/4nP2/8 w - - 0 1)

Albaina, Alvaro Ignacio

Problemas, 2000

8/3K4/5N2/3Nk1b1/2p3P1/Q7/4nP2/8

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe3#
    • 1...Bh4
      • 2.Qe3#
    • 1...Sc1
      • 2.Qc3#
    • 1...Sg1
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sg3
      • 2.Qc3#
    • 1...Sd4
      • 2.Qd6#
    • 1...Sf4
      • 2.Qc3#
      • 2.Qe3#
  • Tries
    • 1.Se7?
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Sc6#
      • 1...Kf4
        • 2.Sg6#
        • 2.Qe3#
      • 1...Bxf6
        • 2.Qe3#
      • 1...Kxf6!
    • 1.Qb2+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd4
        • 2.Qb8#
      • 1...c3!
    • 1.f4+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Sxf4
        • 2.Qc3#
        • 2.Qe3#
      • 1...Bxf4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Kxf6
        • 2.Qe7#
      • 1...Bxf6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • B(d);N_GUARD::QAR2(B),XB(d)
    • B(d);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAB(B)
    • S(a);N_GUARD::QAB(B),XS(a)
    • S(a);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);S_FLIGHT::S(D)
        • B(d);N_GUARD,SBLOCK,XS(E)::QAR2(B)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(B),XS(a)
        • S(a);P_SPINS(a),SBLOCK::QAB(B)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • P(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • B(d);XP(A)
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • K(c);S_FLIGHT,XS(D)::QAB1(B)
      • K(c);S_FLIGHT,XS(E)::QAB1(B)
      • B(d);SBLOCK,XS(E)::QAR2(B)
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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).