MESON Chess Problem Database

Problem Display
PID: 17992 (K4B2/3N4/6k1/5nbR/4n2p/3Q4/B5R1/7b w - - 0 1)

Hannelius, Jan Ingvar

1st Prize, Suomen Tehtavaniekat, 1952

K4B2/3N4/6k1/5nbR/4n2p/3Q4/B5R1/7b

#2

7 + 6

3105 FIDE Album (1945-1955) 1964
56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh5
      • 2.Bf7#
    • 1...Sd2
      • 2.Rh6#
    • 1...Sf2
      • 2.Rh6#
    • 1...Sc3
      • 2.Rh6#
    • 1...Sc5
      • 2.Rh6#
    • 1...Sed6
      • 2.Rh6#
    • 1...Sf6
      • 2.Rh6#
    • 1...Se3
      • 2.Rgxg5#
    • 1...Sd4
      • 2.Rgxg5#
    • 1...Sfd6
      • 2.Rgxg5#
    • 1...Se7
      • 2.Rgxg5#
    • 1...Sg7
      • 2.Rgxg5#
  • Tries
    • 1.Se5+?
      • 1...Kxh5
        • 2.Bf7#
        • 2.Qe2#
        • 2.Qd1#
        • 2.Qf3#
      • 1...Kf6!
    • 1.Qxe4?
      • threat
        • 2.Rgxg5#
        • 2.Rh6#
        • 2.Qe8#
      • 1...Kxh5
        • 2.Bf7#
        • 2.Qe8#
      • 1...Bxg2!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qf7#
      • 1...Kxh5
        • 2.Qf7#
      • 1...Sh6
        • 2.Rxh6#
      • 1...Sed6
        • 2.Rgxg5#
      • 1...Sfd6
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • K(f);N_SPINB(e),S_FLIGHT,XR(D)::B(A)
    • S(b);P_PINR(B),P_SPINS(d)::R1(D)
    • S(d);P_SPINS(b)::R1(B),XB(e)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(f);N_SPINB(e),P-FLIGHT
    • Try
      • Q(C);P_PINS(d),XS(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);N_SPINB(e),P_PINQ(C),XR(B)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(f);N_SPINB(e),S_FLIGHT,XR(D)::QAB(C)
      • S(d);N_GUARD::R1(D),XS(d)
      • S(b);N_GUARD::R1(B),XB(e)
      • S(d);N_GUARD::R1(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).