MESON Chess Problem Database

Problem Display
PID: 200235 (8/5B2/5p2/1N1pkPR1/2p1P1pR/2q1n1K1/1Bb1pNpQ/3r1rn1 w - - 0 1)

Albarda, Johannes

Het Parool, 1977

8/5B2/5p2/1N1pkPR1/2p1P1pR/2q1n1K1/1Bb1pNpQ/3r1rn1

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf5+
      • 2.Kxg4#
  • Tries
    • 1.Bxc3+?
      • 1...Rd4
        • 2.Bxd4#
      • 1...d4!
    • 1.Rh8?
      • threat
        • 2.Re8#
      • 1...Sxf5+
        • 2.Kxg4#
      • 1...fxg5!
  • Keys
    • 1.Rhxg4!
      • threat
        • 2.Kh4#
      • 1...Sxg4+
        • 2.Kxg4#
      • 1...Sxf5+
        • 2.Kxg2#
      • 1...Rxf2
        • 2.Kxf2#
      • 1...fxg5
        • 2.Qh8#
      • 1...Sf3
        • 2.Kxf3#
      • 1...Sh3
        • 2.Kxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(h);CHECK,P_SPINS(h),XP(H)::QAB(C)+K(D),XP(j)
  • Tries
    • Try
      • B(A);CHECK,XQ(g)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • P(k);P_SPINP(k)
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • S(h);CHECK,P_SPINS(h),XP(H)::QAB(C)+K(D),XP(j)
      • Refutation
        • P(m);XR(I)
  • Actual
    • R(F);XP(j)
    • Threat
      • QAB(C)+K(D)
    • Vars
      • S(h);CHECK,XR(F)::QAB(C)+K(D),XS(h)
      • S(h);CHECK,P_SPINS(h),XP(H)::QAB(C)+K(D),XP(f)
      • R(b);XS(B)::QAB(C)+K(D),XR(b)
      • P(m);OGATEB,XR(I)::QAB(C)
      • S(c);::QAB(C)+K(D),XS(c)
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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).