MESON Chess Problem Database

Problem Display
PID: 71051 (3N4/B1R5/6p1/2Pp1PP1/3PNk1P/4p3/2K1Q3/8 w - - 0 1)

Coello Alonso, Jose Antonio

Petite, Efren

Mat Plus, 1997

3N4/B1R5/6p1/2Pp1PP1/3PNk1P/4p3/2K1Q3/8

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qg4#
    • 1...Kxf5
      • 2.Qf3#
  • Tries
    • 1.Kd3?
      • 1...Kxf5
        • 2.Rf7#
        • 2.Qf3#
      • 1...gxf5
        • 2.Se6#
      • 1...dxe4+!
    • 1.Se6+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kxf5!
    • 1.Re7?
      • 1...Kxf5
        • 2.Qf3#
      • 1...gxf5
        • 2.Bb8#
      • 1...dxe4!
    • 1.Rf7?
      • 1...Kxe4
        • 2.Qg4#
      • 1...dxe4
        • 2.Bb8#
      • 1...gxf5!
    • 1.f6?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#
      • 1...dxe4!
  • Keys
    • 1.Bb8!
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qf3#
      • 1...dxe4
        • 2.Rf7#
      • 1...gxf5
        • 2.Re7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(a),XS(D)::QAR2(B)
    • K(b);P-FLIGHT,XP(G)::QAR2(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(d);SBLOCK,XP(G)::S(K)
      • Refutation
        • P(c);CHECK,XS(D)
    • Try
      • S(K);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a),XS(D)::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • R(J);
      • Vars
        • K(b);P-FLIGHT,XP(G)::QAR2(B)
        • P(d);SBLOCK,XP(G)::B(I)
      • Refutation
        • P(c);XS(D)
    • Try
      • R(J);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a),XS(D)::QAR2(B)
        • P(c);SBLOCK,XS(D)::B(I)
      • Refutation
        • P(d);P_SPINP(d),XP(G)
    • Try
      • P(G);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a),XS(D)::QAR2(B)
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • P(c);XS(D)
  • Actual
    • B(I);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a),XS(D)::QAR2(B)
      • K(b);P-FLIGHT,XP(G)::QAR2(B)
      • P(c);SBLOCK,XS(D)::B(I)+R(J)
      • P(d);SBLOCK,XP(G)::B(I)+R(J)
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).