MESON Chess Problem Database

Problem Display
PID: 188401 (3R4/3nK3/N2NB1Q1/8/1R2n1r1/b2krP2/1Pp1p3/2qbB3 w - - 0 1)

Hassberg, Eric Manfred

To Alain White, 1945

3R4/3nK3/N2NB1Q1/8/1R2n1r1/b2krP2/1Pp1p3/2qbB3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sxc5#
    • 1...Se5
      • 2.Sc5#
    • 1...Sb6
      • 2.Sc5#
    • 1...Sf6
      • 2.Sc5#
    • 1...Sb8
      • 2.Sc5#
    • 1...Sf8
      • 2.Sc5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc5#
        • 2.Bc4#
        • 2.Rxd7#
      • 1...Bxb4+
        • 2.Sxb4#
      • 1...Qxb2
        • 2.Sc5#
        • 2.Bc4#
      • 1...Rxg6
        • 2.Bc4#
      • 1...Bxb2
        • 2.Sc5#
        • 2.Bc4#
      • 1...Rg5
        • 2.Bc4#
      • 1...Rxf3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Bc4#
      • 1...Bxb4+
        • 2.Sxb4#
      • 1...Sd2
        • 2.Sc5#
      • 1...Sf2
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sg3
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sg5
        • 2.Sc5#
      • 1...Sd6
        • 2.Rb3#
      • 1...Sf6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 6
  • Sets
    • S(j);N_GUARD::S(E),XS(j)
    • S(j);N_GUARD::S(E)
  • Tries
    • Try
      • S(F);P_SPINR(D)
      • Threat
        • DUALS(3)
      • Vars
        • B(e);CHECK,XR(D)::S(E),XB(e)
        • R(i);N_SPINS(h),P_SPINS(j),XQ(H)::B(G)
        • R(i);::B(G)
      • Refutation
        • R(g);XP(C)
  • Actual
    • S(F);N_PINS(h),P_PINS(j),P_SPINR(D)
    • Threat
      • B(G)
    • Vars
      • B(e);CHECK,XR(D)::S(E),XB(e)
      • S(h);N_GUARD,P_PINB(G)::S(E)
      • S(h);N_GUARD,N_PINR(D),P_PINB(G)::S(E),XS(h)
      • S(h);N_PINR(D),N_SPINS(j),P_PINB(G)::R(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).