MESON Chess Problem Database

Problem Display
PID: 139725 (K5b1/7P/1QBN4/8/RP2pb2/1k2q1rR/2p1P3/B1n2Nr1 w - - 0 1)

Feenstra Kuiper, Pieter

Schaakmat, 0000

K5b1/7P/1QBN4/8/RP2pb2/1k2q1rR/2p1P3/B1n2Nr1

#2

11 + 9

3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...Qc5
      • 2.bxc5#
    • 1...Qxb6
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...Rg2
      • 2.Sd2#
    • 1...Rg4
      • 2.Sd2#
    • 1...Rg5
      • 2.Sd2#
    • 1...Rg6
      • 2.Sd2#
    • 1...Rg7
      • 2.Sd2#
    • 1...Bg5
      • 2.hxg8Q#
      • 2.hxg8B#
  • Tries
    • 1.Bd5+?
      • 1...Kxa4
        • 2.Qa5#
      • 1...Bxd5+!
    • 1.Qxe3+?
      • 1...Rxe3
        • 2.Sd2#
      • 1...Sd3
        • 2.Sd2#
      • 1...Bxe3!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Sa5#
      • 1...Kc4
        • 2.Sa5#
      • 1...Qxb6
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Qc5
        • 2.bxc5#
      • 1...Rg5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(e);P_SPINR(f)::PXB(i)=Q
    • Q(e);OGATE,P_SPINR(f)::QAR(G)+P(F),XQ(e)
    • Q(e);P_SPINR(f),XQ(G)::PXB(i)=Q
    • R(f);P_SPINQ(e)::S(B)
    • B(h);S_CUTR(f)::PXB(i)=Q
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(E)::QAR1(G)
      • Refutation
        • B(i);CHECK,XB(H)
    • Try
      • Q(G);CHECK,XQ(e)
      • Vars
        • R(f);P_SPINR(f),XQ(G)::S(B)
        • S(a);P_SPINS(a)::S(B)
      • Refutation
        • B(h);XQ(G)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(d);S_FLIGHT::S(I)
      • Q(e);P_SPINR(f),XQ(G)::PXB(i)=Q
      • Q(e);OGATE,P_SPINR(f)::QAR(G)+P(F),XQ(e)
      • R(f);P_SPINQ(e)::S(B)
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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).