MESON Chess Problem Database

Problem Display
PID: 196669 (6K1/p1n5/rp5p/PN3R2/pBQ1p3/Rb2k3/3pP3/N2q1B2 w - - 0 1)

Praski, Seppo

Suomen Shakki, 1985

6K1/p1n5/rp5p/PN3R2/pBQ1p3/Rb2k3/3pP3/N2q1B2

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qxe2
      • 2.Sc2#
    • 1...Qe1
      • 2.Sc2#
    • 1...Qxf1
      • 2.Sc2#
    • 1...Sd5
      • 2.Qd4#
    • 1...Se6
      • 2.Qc3#
    • 1...bxa5
      • 2.Bc5#
  • Tries
    • 1.Rxb3+?
      • 1...axb3
        • 2.Qc3#
        • 2.Qd4#
      • 1...Qxb3!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Bxh6#
      • 1...Qxf1
        • 2.Sc2#
      • 1...bxa5
        • 2.Bc5#
      • 1...Sd5
        • 2.Qd4#
      • 1...Se6
        • 2.Qc3#
      • 1...h5
        • 2.Bh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD,XP(C)::S(A)
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,XB(B)::S(A)
    • S(k);N_PINQ(F)::QAB1(F)
    • S(k);N_PINQ(F)::QAR2(F)
    • P(h);N_GUARD,XP(G)::B(E)
  • Tries
    • Try
      • R(D);CHECK,N_SPINQ(F),XB(c)
      • Refutation
        • Q(a);P_PINQ(F),XR(D)
  • Actual
    • B(E);
    • Threat
      • B(E),XP(i)
    • Vars
      • Q(a);N_GUARD,XB(B)::S(A)
      • P(h);N_GUARD,XP(G)::B(E)
      • S(k);N_PINQ(F)::QAB1(F)
      • S(k);N_PINQ(F)::QAR2(F)
      • P(i);::B(E)
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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).