MESON Chess Problem Database

Problem Display
PID: 78439 (4N1K1/8/R2P2N1/3k1p2/1Pr2R1b/1PnbP1n1/2qP4/B4Q2 w - - 0 1)

Marble, Murray

Source?, 1909

4N1K1/8/R2P2N1/3k1p2/1Pr2R1b/1PnbP1n1/2qP4/B4Q2

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc7#
    • 1...Re4
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Be4
      • 2.Qxc4#
  • Tries
    • 1.Rxf5+?
      • 1...Ke4
        • 2.Re5#
        • 2.Qf3#
        • 2.Qf4#
      • 1...Ke6
        • 2.Sf8#
      • 1...Bxf5
        • 2.Qxc4#
      • 1...Sxf5!
    • 1.bxc4+?
      • 1...Bxc4
        • 2.Sc7#
        • 2.Qxc4#
      • 1...Ke6!
  • Keys
    • 1.Re4!
      • threat
        • 2.Re5#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Rxe4
        • 2.Sc7#
      • 1...Bxe4
        • 2.Qxc4#
      • 1...Scxe4
        • 2.Sf4#
      • 1...Sgxe4
        • 2.Qxf5#
      • 1...fxe4
        • 2.Qf7#
      • 1...Bf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD::S(K)
    • R(e);N_GUARD::S(K),XR(e)
    • B(c);OGATE::QAB1(B),XR(e)
  • Tries
    • Try
      • R(G);CHECK,XP(h)
      • Vars
        • K(g);S_FLIGHT::S(J)
        • B(c);OGATE,XR(G)::QAB1(B),XR(e)
      • Refutation
        • S(d);XR(G)
    • Try
      • P(D);CHECK,XR(e)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • K(g);OGATEB,S_FLIGHT,XR(G)::QAB(B)
      • R(e);N_GUARD,SBLOCK,XR(G)::S(K)
      • B(c);OGATE,XR(G)::QAB1(B),XR(e)
      • S(b);SBLOCK,XR(G)::S(J)
      • S(d);N_GUARD,XR(G)::QAR2(B),XP(h)
      • P(h);OGATE,SBLOCK,XR(G)::QAB(B)
      • B(f);N_GUARD::S(K),XB(f)
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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).