MESON Chess Problem Database

Problem Display
PID: 187498 (4rq1b/1b1PRPnB/1B2n3/4NP1p/2P1Nk1P/2K1p2P/4P1R1/1Q6 w - - 0 1)

Forster, Klaus

Paslack, Rainer

Die Schwalbe, 2018

4rq1b/1b1PRPnB/1B2n3/4NP1p/2P1Nk1P/2K1p2P/4P1R1/1Q6

#2

15 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Bc7#
    • 1...Sd4
      • 2.Sd3#
    • 1...Sg5
      • 2.Sd3#
    • 1...Sc7
      • 2.Sd3#
    • 1...Sd8
      • 2.Sd3#
  • Tries
    • 1.Rf2+?
      • 1...Kxe5
        • 2.Bd4#
        • 2.Bc7#
      • 1...exf2!
    • 1.Rg4+?
      • 1...Kxe5
        • 2.Bd4#
        • 2.Bc7#
      • 1...hxg4!
    • 1.Rg5?
      • threat
        • 2.Sg6#
      • 1...Kxe5
        • 2.Bc7#
      • 1...Sxg5
        • 2.Sd3#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...Qxf7!
  • Keys
    • 1.f6!
      • threat
        • 2.Sd3#
      • 1...Kxe5
        • 2.Bc7#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Sc5
        • 2.Qf1#
      • 1...Sf5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XS(I)::B(K)
    • S(d);::S(I)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • P(a);XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • P(c);XR(C)
    • Try
      • R(C);
      • Threat
        • S(I)
      • Vars
        • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XS(I)::B(K)
        • S(d);XR(C)::S(I)
        • S(f);OGATE,P_PINS(I),XP(J)::R1(C),XS(f)
      • Refutation
        • Q(h);XP(N)
  • Actual
    • P(J);
    • Threat
      • S(I)
    • Vars
      • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XS(I)::B(K)
      • B(e);OGATE,XS(G)::QAR1(A),XB(e)
      • S(d);::QAR(A)
      • S(f);SBLOCK::S(I)
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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).