MESON Chess Problem Database

Problem Display
PID: 120975 (B7/1P6/4p2N/4P3/1Rn1k3/2P5/3P3Q/4K3 w - - 0 1)

Hellstrom, Ake

Source?, 1937

B7/1P6/4p2N/4P3/1Rn1k3/2P5/3P3Q/4K3

#2

9 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.b8Q#
      • 2.b8S#
      • 2.b8B#
      • 2.b8R#
  • Tries
    • 1.Kd1?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kf3
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...Kd5!
    • 1.Qe2+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd5!
    • 1.Qf2?
      • 1...Kd5
        • 2.b8Q#
        • 2.b8B#
      • 1...Kxe5
        • 2.Qd4#
      • 1...Kd3!
  • Keys
    • 1.Qg1!
      • 1...Kd3
        • 2.Qg6#
      • 1...Kf3
        • 2.Qg4#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd5
        • 2.b8Q#
        • 2.b8B#
      • 1...Kxe5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::P=Q
        • K(b);N_SPINS(a),P-FLIGHT,XP(F)::QAB1(C)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);N_SPINS(a),S_FLIGHT::QAB(C)
      • K(b);N_SPINS(a),S_FLIGHT::QAB1(C)
      • K(b);P-FLIGHT::QAB1(C)
      • K(b);N_SPINS(a),S_FLIGHT::P=Q
      • K(b);N_SPINS(a),P-FLIGHT,XP(F)::QAB1(C)
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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).