MESON Chess Problem Database

Problem Display
PID: 198236 (8/5N1P/1K3p2/8/4kNp1/5nP1/3P4/5R1Q w - - 0 1)

Wahlmark, Carl Primus

Upsala Nya Tidning, 1920

8/5N1P/1K3p2/8/4kNp1/5nP1/3P4/5R1Q

#2

8 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Kc5?
      • 1...f5
        • 2.Re1#
      • 1...Kf5!
    • 1.Rb1?
      • 1...Kd4
        • 2.Rb4#
      • 1...f5
        • 2.Rb4#
      • 1...Kf5!
    • 1.Qxf3+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qd3#
      • 1...Kf5
        • 2.Qd5#
        • 2.Qd3#
      • 1...gxf3!
    • 1.h8Q?
      • 1...Kf5
        • 2.Q1h7#
        • 2.Q8h7#
      • 1...f5
        • 2.Sg5#
        • 2.Sd6#
        • 2.Re1#
        • 2.Qe5#
      • 1...Kd4!
    • 1.h8B?
      • 1...Kf5
        • 2.Qh7#
      • 1...f5
        • 2.Sg5#
        • 2.Sd6#
        • 2.Re1#
      • 1...Kd4!
  • Keys
    • 1.Ra1!
      • 1...Kd4
        • 2.Ra4#
      • 1...Kf5
        • 2.Qb1#
      • 1...f5
        • 2.Ra4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(d);SBLOCK::R(A)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINS(a),P-FLIGHT::R(A)
        • P(d);SBLOCK::R(A)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • Q(B);CHECK,XS(a)
      • Refutation
        • P(c);XQ(B)
    • Try
      • P(H);
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT,P_SPINP(d)
    • Try
      • P(H);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB(B)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT,P_SPINP(d)
  • Actual
    • R(A);
    • Vars
      • K(b);N_SPINS(a),P-FLIGHT::R(A)
      • K(b);N_SPINS(a),S_FLIGHT::QAB(B)
      • P(d);SBLOCK::R(A)
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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).