MESON Chess Problem Database

Problem Display
PID: 177975 (k2N1R2/2p5/8/NpP5/1p4pK/5q2/RP5n/7Q w - - 0 1)

Lazdinits, Eriks

5th Comm., Sahs (Latvia), 1986

k2N1R2/2p5/8/NpP5/1p4pK/5q2/RP5n/7Q

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ka7
      • 2.Sac6#
    • 1...Kb8
      • 2.Sdc6#
    • 1...Qxh1
      • 2.Sac6#
      • 2.Sdc6#
    • 1...Qg2
      • 2.Sac6#
      • 2.Sdc6#
    • 1...Qe4
      • 2.Sac6#
    • 1...Qc6
      • 2.Saxc6#
      • 2.Sdxc6#
    • 1...Qb7
      • 2.Qxb7#
  • Tries
    • 1.Re8?
      • threat
        • 2.Sdc6#
      • 1...Ka7
        • 2.Sac6#
      • 1...Kb8
        • 2.Sdc6#
      • 1...Qe4
        • 2.Sac6#
      • 1...Qc6
        • 2.Saxc6#
        • 2.Sdxc6#
      • 1...Qb7
        • 2.Qxb7#
      • 1...c6
        • 2.Sdxc6#
      • 1...Qd5!
    • 1.Qxf3+?
      • 1...Ka7
        • 2.Sac6#
        • 2.Qb7#
      • 1...Kb8
        • 2.Sdc6#
        • 2.Qb7#
      • 1...gxf3
        • 2.Sac6#
        • 2.Sdc6#
      • 1...c6
        • 2.Saxc6#
        • 2.Sdxc6#
      • 1...Sxf3+!
  • Keys
    • 1.b3!
      • threat
        • 2.Sac6#
      • 1...Ka7
        • 2.Sac6#
      • 1...Kb8
        • 2.Sdc6#
      • 1...Qg2
        • 2.Sdc6#
      • 1...Qc6
        • 2.Saxc6#
        • 2.Sdxc6#
      • 1...Qb7
        • 2.Qxb7#
      • 1...c6
        • 2.Saxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(g);N_SPINQ(b),P-FLIGHT::R(B)+S(E),DCHECK
    • K(g);N_SPINQ(b),P-FLIGHT::R(H)+S(G),DCHECK
    • Q(b);N_GUARD::R(B)+S(E)
    • Q(b);OGATE::QAB1(A),XQ(b)
  • Tries
    • Try
      • R(H);
      • Threat
        • R(H)+S(G)
      • Vars
        • K(g);N_SPINQ(b),P-FLIGHT::R(B)+S(E),DCHECK
        • K(g);N_SPINQ(b),P-FLIGHT::R(H)+S(G),DCHECK
        • Q(b);N_GUARD::R(B)+S(E)
        • Q(b);OGATE::QAB1(A),XQ(b)
        • P(f);N_SPINQ(b)::R(H)+S(G),XP(f)
      • Refutation
        • Q(b);
    • Try
      • Q(A);CHECK,XQ(b)
      • Refutation
        • S(a);CHECK,XQ(A)
  • Actual
    • P(C);
    • Threat
      • R(B)+S(E)
    • Vars
      • K(g);N_SPINQ(b),P-FLIGHT::R(B)+S(E),DCHECK
      • K(g);N_SPINQ(b),P-FLIGHT::R(H)+S(G),DCHECK
      • Q(b);N_GUARD::R(H)+S(G)
      • Q(b);OGATE::QAB1(A),XQ(b)
      • P(f);N_SPINQ(b)::R(B)+S(E),XP(f)
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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).