MESON Chess Problem Database

Problem Display
PID: 18195 (8/Bp4p1/pR2br2/3P2Q1/1np1P2p/3P4/1r3k1P/3R1B1K w - - 0 1)

Haring, Jacobus

4th Prize, BCF, 1954

8/Bp4p1/pR2br2/3P2Q1/1np1P2p/3P4/1r3k1P/3R1B1K

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qg1#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rg6
      • 2.Qf4#
    • 1...Rh6
      • 2.Qf4#
    • 1...Bh3
      • 2.Rxf6#
    • 1...Bg4
      • 2.Rxf6#
    • 1...Bxd5
      • 2.Rxf6#
    • 1...Bf5
      • 2.Qf4#
    • 1...Bd7
      • 2.Rxf6#
    • 1...Bf7
      • 2.Rxf6#
    • 1...Bc8
      • 2.Rxf6#
    • 1...Bg8
      • 2.Rxf6#
    • 1...h3
      • 2.Qg3#
  • Tries
    • 1.Qxh4+?
      • 1...Kf3
        • 2.Qg3#
      • 1...Ke3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Rxb7#
      • 1...Ke3
        • 2.Rxb7#
      • 1...Bxg4
        • 2.Rxf6#
      • 1...Bxd5
        • 2.Rxf6#
      • 1...Sxd3
        • 2.Rxb2#
      • 1...Sxd5
        • 2.Rxb2#
      • 1...Re2
        • 2.Qxe2#
      • 1...Rf3
        • 2.Qg1#
      • 1...Bf5
        • 2.Qf4#
      • 1...Bd7
        • 2.Rxf6#
      • 1...Bf7
        • 2.Rxf6#
      • 1...Bc8
        • 2.Rxf6#
      • 1...Bg8
        • 2.Rxf6#
      • 1...Sa2
        • 2.Rxb2#
      • 1...Sc2
        • 2.Qe2#
      • 1...Sc6
        • 2.Rxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(h);SBLOCK::QAB1(H)
    • R(h);N_GUARD::QAR2(H),XR(h)
    • R(h);N_GUARD::QAR2(H)
    • B(g);OGATE::B(J)+R(I),DCHECK,XR(h)
    • B(g);OGATE,P_PINP(F),XP(G)::B(J)+R(I),DCHECK,XR(h)
    • B(g);S_CUTR(h)::QAR2(H)
    • P(e);N_GUARD::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK,XP(e)
      • Vars
        • K(b);P-FLIGHT::QAR1(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(H);
    • Threat
      • B(J)+R(I),XP(i)
    • Vars
      • K(b);S_FLIGHT::B(J)+R(I),XP(i)
      • B(g);OGATE,XQ(H)::B(J)+R(I),DCHECK,XR(h)
      • B(g);OGATE,P_PINP(F),XP(G)::B(J)+R(I),DCHECK,XR(h)
      • S(c);OGATE,XP(E)::B(J)+R(I),DCHECK,XR(a)
      • S(c);OGATE,XP(G)::B(J)+R(I),DCHECK,XR(a)
      • R(a);N_GUARD::QAR1(H),XR(a)
      • R(h);SBLOCK::QAB1(H)
      • B(g);S_CUTR(h)::QAR2(H)
      • B(g);OGATE::B(J)+R(I),DCHECK,XR(h)
      • S(c);OGATE::B(J)+R(I),DCHECK,XR(a)
      • S(c);S_CUTR(a)::QAR1(H)
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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).