MESON Chess Problem Database

Problem Display
PID: 214596 (5n2/5rb1/3B4/2pn2pQ/4kpR1/4P2B/2P2K2/1r1R4 w - - 0 1)

Hervey, DE

Newark Sunday Call, 1880

5n2/5rb1/3B4/2pn2pQ/4kpR1/4P2B/2P2K2/1r1R4

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Rxf4#
    • 1...Rf5
      • 2.Bg2#
  • Tries
    • 1.Rxf4+?
      • 1...Sxf4
        • 2.Qf3#
      • 1...gxf4
        • 2.Qf3#
        • 2.Qxd5#
      • 1...Rxf4+!
    • 1.Qg6+?
      • 1...Rf5
        • 2.Bg2#
      • 1...Sxg6!
    • 1.Qxg5?
      • threat
        • 2.Bg2#
        • 2.Qxd5#
      • 1...Rxd1
        • 2.Bg2#
      • 1...Rf5
        • 2.Bg2#
      • 1...Bd4
        • 2.Bg2#
      • 1...Be5
        • 2.Bg2#
        • 2.Qxe5#
      • 1...Sc3
        • 2.Bg2#
      • 1...Sb4
        • 2.Bg2#
      • 1...Sb6
        • 2.Bg2#
      • 1...Sf6
        • 2.Bg2#
        • 2.Rxf4#
        • 2.Qxf4#
        • 2.Qe5#
      • 1...Sc7
        • 2.Bg2#
      • 1...Se7
        • 2.Bg2#
      • 1...Sxe3!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qf3#
      • 1...g4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(b);N_SPINP(c),P_SPINP(f),S_FLIGHT::B(E)+R(F),DCHECK,XP(c)
    • R(g);SBLOCK::B(E)
  • Tries
    • Try
      • R(F);CHECK,P_SPINR(F),XP(c)
      • Vars
        • S(e);XR(F)::QAB1(G)
      • Refutation
        • R(g);CHECK,XR(F)
    • Try
      • Q(G);CHECK
      • Vars
        • R(g);P_SPINR(g)::B(E)
      • Refutation
        • S(i);XQ(G)
    • Try
      • Q(G);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XR(A)::B(E)
        • R(g);::B(E)
        • B(h);P_PINP(D)::B(E)
        • S(e);::B(E)
      • Refutation
        • S(e);XP(D)
  • Actual
    • R(F);
    • Threat
      • QAB1(G)
    • Vars
      • P(f);N_SPINP(c),OGATE::QAB1(G),XS(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).