MESON Chess Problem Database

Problem Display
PID: 140157 (4Rn2/5R2/2N1q2B/1Kp2b1Q/1p2k3/5rp1/B2P4/4brN1 w - - 0 1)

den Toom, Cornelis

Probleemblad, 1975

4Rn2/5R2/2N1q2B/1Kp2b1Q/1p2k3/5rp1/B2P4/4brN1

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bb1#
    • 1...Rf4
      • 2.Qe2#
    • 1...Bf2
      • 2.Qxf3#
    • 1...Bh3
      • 2.Qd5#
    • 1...Bg4
      • 2.Qd5#
    • 1...Bg6
      • 2.Qd5#
    • 1...Bh7
      • 2.Qd5#
  • Tries
    • 1.Qg4+?
      • 1...Kd3
        • 2.Bb1#
      • 1...Rf4
        • 2.Qe2#
      • 1...Bxg4!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qxf5#
      • 1...Kd3
        • 2.Bb1#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Rxf4
        • 2.Qe2#
      • 1...Bh3
        • 2.Qd5#
      • 1...Bg4
        • 2.Qd5#
      • 1...Bg6
        • 2.Qd5#
      • 1...Bh7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINQ(i),S_FLIGHT::B(B)
    • R(c);OGATE::QAR2(E)
    • B(a);S_CUTR(b)::QAB1(E),XR(c)
    • B(h);OGATE::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);N_SPINQ(i),S_FLIGHT::B(B)
        • R(c);OGATE,P_SPINR(c)::QAR2(E)
      • Refutation
        • B(h);XQ(E)
  • Actual
    • B(G);
    • Threat
      • QAB1(E),XB(h)
    • Vars
      • K(f);N_SPINQ(i),S_FLIGHT::B(B)
      • K(f);N_SPINQ(i),OGATEB,P-FLIGHT,P_SPINB(h),XB(G)::QAR2(E)
      • R(c);OGATE,SBLOCK,XB(G)::QAR2(E)
      • B(h);OGATE::QAB1(E)
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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).