MESON Chess Problem Database

Problem Display
PID: 198339 (4r3/2N2p2/1B6/b2P3Q/r3k1p1/1N1p2K1/5P2/1n6 w - - 0 1)

Oosterholt, Cornelis Johannes

De Maasbode, 1920

4r3/2N2p2/1B6/b2P3Q/r3k1p1/1N1p2K1/5P2/1n6

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc5#
    • 1...Re5
      • 2.Qxg4#
    • 1...Sc3
      • 2.Sd2#
    • 1...f5
      • 2.Qxe8#
  • Tries
    • 1.Kxg4?
      • threat
        • 2.Qf5#
        • 2.f3#
      • 1...f5+
        • 2.Qxf5#
      • 1...Bxb6
        • 2.Qf5#
      • 1...d2
        • 2.Qf5#
      • 1...Rd4
        • 2.Sc5#
        • 2.Qf5#
      • 1...Re5
        • 2.Qh1#
        • 2.f3#
      • 1...Sd2
        • 2.Qf5#
      • 1...Rg8+!
  • Keys
    • 1.d6!
      • threat
        • 2.Qd5#
      • 1...f5
        • 2.Qxe8#
      • 1...Rd4
        • 2.Sc5#
      • 1...Re5
        • 2.Qxg4#
      • 1...Sc3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::S(B)
    • R(h);SBLOCK::QAR2(E),XP(e)
    • S(a);N_GUARD,S_CUTB(f)::S(B)
    • P(g);OGATE,SBLOCK::QAR(E),XR(h)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);CHECK::QAB1(E),XP(g)
        • B(f);XB(F)::QAB1(E)
        • P(b);::QAB1(E)
        • S(a);::QAB1(E)
      • Refutation
        • R(h);CHECK
  • Actual
    • P(D);
    • Threat
      • QAB1(E)
    • Vars
      • P(g);OGATE,SBLOCK::QAR(E),XR(h)
      • R(c);SBLOCK::S(B)
      • R(h);SBLOCK::QAR2(E),XP(e)
      • S(a);N_GUARD,S_CUTB(f)::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).