MESON Chess Problem Database

Problem Display
PID: 18187 (4R2q/4n2p/Kp2Q3/1Np1b1R1/3pk3/3b4/5n1N/1BB5 w - - 0 1)

Hassberg, Eric Manfred

3rd Prize, Volksgazet TT, 1953

4R2q/4n2p/Kp2Q3/1Np1b1R1/3pk3/3b4/5n1N/1BB5

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe8
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Qf8
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Qg8
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Sd1
      • 2.Rg4#
    • 1...Sh1
      • 2.Rg4#
    • 1...Sg4
      • 2.Rxg4#
    • 1...Sd5
      • 2.Qf5#
    • 1...Sf5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sg6
      • 2.Qc6#
    • 1...Sc8
      • 2.Qc6#
    • 1...Sg8
      • 2.Qc6#
    • 1...c4
      • 2.Sd6#
  • Tries
    • 1.Bxd3+?
      • 1...Sxd3
        • 2.Sd6#
      • 1...Kxd3!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sc3#
      • 1...Bxh2
        • 2.Qd5#
      • 1...Sd1
        • 2.Bxd3#
      • 1...Sd5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • S(a);N_GUARD::R(E)
    • S(a);N_GUARD::R(E),XS(a)
    • S(h);N_GUARD,SBLOCK::QAB1(G)
    • S(h);N_GUARD::QAB(G)
    • S(h);N_GUARD::QAB(G),XS(h)
    • P(e);N_PINS(D)::S(D)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(D),P_PINB(f),XB(b)
      • Vars
        • S(a);SBLOCK,XB(A)::S(D)
      • Refutation
        • K(d);N_SPINB(f),S_FLIGHT,XB(A)
  • Actual
    • Q(G);N_SPINS(D),P_PINP(c)
    • Threat
      • S(D)
    • Vars
      • B(f);P_SPINS(h),XS(C)::QAB1(G)
      • S(a);N_GUARD::B(A),XB(b)
      • S(h);S_CUTB(f)::S(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).