MESON Chess Problem Database

Problem Display
PID: 255634 (3R4/1Q1N2B1/2r2N2/2P2PKp/1P1k2pR/2p2p2/P1pprP2/5B2 w - - 0 1)

Bakker, Peter Arie

Probleemblad, 1984

3R4/1Q1N2B1/2r2N2/2P2PKp/1P1k2pR/2p2p2/P1pprP2/5B2

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Se5#
    • 1...Kc4
      • 2.Se5#
    • 1...Ra6
      • 2.Qd5#
    • 1...Rb6
      • 2.Qd5#
    • 1...Re6
      • 2.Qd5#
    • 1...Rc7
      • 2.Qd5#
    • 1...Rc8
      • 2.Qd5#
  • Tries
    • 1.Se5+?
      • 1...Kxe5
        • 2.Rd5#
      • 1...Rd6!
    • 1.Sb6+?
      • 1...Ke5
        • 2.Sc4#
        • 2.Rd5#
      • 1...Rd6!
    • 1.Rxg4+?
      • 1...Kd3
        • 2.Se5#
        • 2.Qb5#
      • 1...Re4
        • 2.Rxe4#
      • 1...hxg4!
  • Keys
    • 1.Sxg4+!
      • 1...Kd3
        • 2.Sge5#
      • 1...Kc4
        • 2.Sde5#
      • 1...Ke4
        • 2.Sdf6#
      • 1...Kd5
        • 2.Sgf6#
      • 1...Re5
        • 2.Se3#
      • 1...Rf6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • K(f);N_GUARD,N_SPINP(g),P-FLIGHT,P_SPINR(c)::R(M)+S(K),DCHECK
    • K(f);N_GUARD,P-FLIGHT,P_SPINR(c),S_CUTR(i)::S(K)
    • R(i);OGATE::QAR1(J)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • K(f);N_SPINP(g),S_FLIGHT,XS(K)::R1(M)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • S(K);CHECK
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • R(E);CHECK,XP(g)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::R1(E),XR(c)
      • Refutation
        • P(h);XR(E)
  • Actual
    • S(I);CHECK,XP(g)
    • Vars
      • K(f);N_GUARD,P-FLIGHT,P_SPINR(c)::S(I)
      • K(f);N_GUARD,P-FLIGHT,P_SPINR(c),S_CUTR(i)::S(K)
      • K(f);N_GUARD,P-FLIGHT,P_SPINR(i)::S(K)
      • K(f);N_GUARD,P-FLIGHT,P_SPINR(i),S_CUTR(c)::S(I)
      • R(c);P_PINP(G),P_SPINR(c)::R(E)+S(I)
      • R(i);P_SPINR(i)::R(M)+S(K)
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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).