MESON Chess Problem Database

Problem Display
PID: 276780 (5N2/1KpBpR2/1p1k4/3n1R2/N2p4/3r4/1B1Q4/8 w - - 0 1)

Haring, Jacobus

Stella Polaris, 1971

5N2/1KpBpR2/1p1k4/3n1R2/N2p4/3r4/1B1Q4/8

#2

8 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Be6?
      • threat
        • 2.Rxd5#
      • 1...Sc3
        • 2.Qf4#
      • 1...Se3
        • 2.Qh2#
      • 1...Sb4
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qf4#
      • 1...c6!
    • 1.Qf4+?
      • 1...e5
        • 2.Qxe5#
      • 1...Sxf4!
    • 1.Qh6+?
      • 1...e6
        • 2.Qxe6#
      • 1...Sf6!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Rxd5#
      • 1...Sc3
        • 2.Ba3#
      • 1...Se3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sf4
        • 2.Qb4#
      • 1...Sf6
        • 2.Qb4#
      • 1...e5
        • 2.Rd7#
      • 1...e6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);
      • Threat
        • R1(D),XS(c)
      • Vars
        • S(c);N_GUARD::QAB(B)
        • S(c);N_GUARD,S_CUTR(a)::QAB(B)
        • S(c);N_GUARD::QAB(B),XS(c)
      • Refutation
        • P(f);
    • Try
      • Q(B);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAB1(B),XP(g)
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR1(B),XP(g)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • B(F);
    • Threat
      • R1(D),XS(c)
    • Vars
      • S(c);N_GUARD,S_CUTR(a)::B(A)
      • S(c);N_GUARD::QAB(B)
      • S(c);N_GUARD::QAB(B),XS(c)
      • P(g);OGATE::R1(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).