MESON Chess Problem Database

Problem Display
PID: 221929 (3B1NKb/8/2pk1pp1/R7/2p1PP2/N1P1R3/bn3Qp1/1n6 w - - 0 1)

Klun, Joseph

Stella Polaris, 1967

3B1NKb/8/2pk1pp1/R7/2p1PP2/N1P1R3/bn3Qp1/1n6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Ra6#
  • Tries
    • 1.Sxc4+?
      • 1...Sxc4
        • 2.Rd3#
      • 1...Bxc4+!
    • 1.Sb5+?
      • 1...Kc5
        • 2.Se6#
        • 2.Sd7#
        • 2.Re1#
        • 2.Re2#
        • 2.Rd3#
        • 2.Rf3#
        • 2.Rg3#
        • 2.Rh3#
      • 1...cxb5!
    • 1.Rd3+?
      • 1...Sxd3
        • 2.Qd4#
      • 1...cxd3+!
    • 1.Qxb2?
      • threat
        • 2.Qb8#
      • 1...c5
        • 2.Ra6#
        • 2.Qb6#
      • 1...Bb3!
  • Keys
    • 1.Ra7!
      • threat
        • 2.Be7#
      • 1...Kc5
        • 2.Rd3#
      • 1...c5
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATEB,SBLOCK::R(G)
  • Tries
    • Try
      • S(B);CHECK,P_SPINS(B),XP(e)
      • Vars
        • S(c);XS(B)::R(D)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • S(B);CHECK
      • Refutation
        • P(f);XS(B)
    • Try
      • R(D);CHECK
      • Vars
        • S(c);XR(D)::QAR2(A)
      • Refutation
        • P(e);CHECK,XR(D)
    • Try
      • Q(A);XS(c)
      • Threat
        • QAB(A)
      • Refutation
        • B(b);
  • Actual
    • R(G);
    • Threat
      • B(H)
    • Vars
      • K(g);S_FLIGHT::QAB(A)+R(D)
      • P(f);OGATEB,SBLOCK::R(G)
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).