MESON Chess Problem Database

Problem Display
PID: 175601 (8/8/q1r1p1n1/2P1k3/2P5/p4R2/2B4P/2b3QK w - - 0 1)

Hulsen, Bernhard

Universum, 1900

8/8/q1r1p1n1/2P1k3/2P5/p4R2/2B4P/2b3QK

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qxc5#
    • 1...Bb2
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Bf4
      • 2.Qa1#
    • 1...Bg5
      • 2.Qa1#
    • 1...Bh6
      • 2.Qa1#
    • 1...Sf4
      • 2.Qg7#
    • 1...Sh4
      • 2.Qg7#
    • 1...Se7
      • 2.Qg7#
    • 1...Sf8
      • 2.Qg7#
    • 1...Sh8
      • 2.Qg7#
  • Tries
    • 1.Qe1+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Kd4!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qd4#
        • 2.Qg5#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Qxc4
        • 2.Qg5#
      • 1...Rxc5
        • 2.Qd4#
      • 1...Bxf4
        • 2.Qa1#
      • 1...Sxf4
        • 2.Qg7#
      • 1...Rd6
        • 2.Qg5#
      • 1...Bb2
        • 2.Qe3#
        • 2.Qg5#
      • 1...Be3
        • 2.Qxe3#
        • 2.Qg5#
      • 1...Sh4
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(e);OGATE,XP(G)::QAR2(A),XR(e)
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD::QAR2(A),XB(a)
    • B(a);OGATE::QAB(A)
    • S(g);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • Q(d);XP(F)::QAR2(A)
      • R(e);XP(G)::QAB1(A)
      • B(a);OGATE,SBLOCK,XR(E)::QAB(A)
      • S(g);OGATE,SBLOCK,XR(E)::QAB(A)
      • R(e);::QAR2(A)
      • S(g);::QAB1(A)
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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).