MESON Chess Problem Database

Problem Display
PID: 188597 (8/8/8/8/2p1N1Bp/3p4/3p1PPQ/1q1rk1K1 w - - 0 1)

Kaila, Osmo

2nd Prize, Suomen Tehtavaniekat, 1965

8/8/8/8/2p1N1Bp/3p4/3p1PPQ/1q1rk1K1

#2

6 + 7

254 Stella Polaris 1966

SOLUTION

  • SOUND
  • Tries
    • 1.Qe5?
      • threat
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sd6#
        • 2.Sf6#
      • 1...Qa1
        • 2.Sc3#
      • 1...Qb2
        • 2.Sc3#
      • 1...Qb5
        • 2.Sc5#
      • 1...Qb6
        • 2.Sc5#
      • 1...Qb8
        • 2.Sd6#
      • 1...c3
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sd6#
        • 2.Sf6#
      • 1...Qb7!
    • 1.f4?
      • threat
        • 2.Qxh4#
      • 1...h3
        • 2.Qg3#
      • 1...Qb6+!
  • Keys
    • 1.Kh1!
      • threat
        • 2.Qg1#
      • 1...Kf1
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(6)
      • Vars
        • Q(a);::QAR(D)+S(E)
        • Q(a);P_PINP(B)::QAR(D)+S(E)
      • Refutation
        • Q(a);
    • Try
      • P(B);
      • Threat
        • QAB(D),XP(g)
      • Vars
        • P(g);N_GUARD::QAB(D)
      • Refutation
        • Q(a);CHECK
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAR2(D)
    • Vars
      • K(c);P-FLIGHT::QAR1(D)
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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).