MESON Chess Problem Database

Problem Display
PID: 175461 (2r5/6n1/2P2R2/1N1k1p2/3P3R/b7/qnQ4K/8 w - - 0 1)

Clark, WA

San Francisco Chronicle, 1899

2r5/6n1/2P2R2/1N1k1p2/3P3R/b7/qnQ4K/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qg2#
    • 1...Rxc6
      • 2.Qxc6#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Ra8
      • 2.Sc7#
    • 1...Rb8
      • 2.Sc7#
    • 1...Rd8
      • 2.Sc7#
    • 1...Re8
      • 2.Sc7#
    • 1...Rf8
      • 2.Sc7#
    • 1...Rg8
      • 2.Sc7#
    • 1...Rh8
      • 2.Sc7#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bd6+
      • 2.Rxd6#
    • 1...Sd1
      • 2.Qxa2#
    • 1...Sd3
      • 2.Qxa2#
    • 1...Sa4
      • 2.Qxa2#
    • 1...Sc4
      • 2.Sc3#
    • 1...Se6
      • 2.Rxf5#
  • Tries
    • 1.Rxf5+?
      • 1...Ke6
        • 2.Qe4#
      • 1...Sxf5!
  • Keys
    • 1.c7!
      • threat
        • 2.Qc6#
      • 1...Bd6+
        • 2.Rxd6#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Qc4
        • 2.Qg2#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sd1
        • 2.Qxa2#
      • 1...Sd3
        • 2.Qxa2#
      • 1...Sa4
        • 2.Qxa2#
      • 1...Sc4
        • 2.Sc3#
      • 1...Se6
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(a);SBLOCK::QAB(A)
    • R(g);OGATE,XP(F)::QAB1(A),XR(g)
    • R(g);N_GUARD::S(E),XR(g)
    • R(g);N_GUARD::S(E)
    • R(g);N_GUARD,P_PINR(D)::S(E)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • B(c);CHECK,N_GUARD::R1(G),XB(c)
    • S(b);OGATE,P_PINQ(A)::QAB(A),XQ(a)
    • S(b);P_PINQ(A),SBLOCK::S(E)
    • S(f);N_GUARD,SBLOCK::R(G),XP(e)
  • Tries
    • Try
      • R(G);CHECK,XP(e)
      • Vars
        • K(d);S_FLIGHT::QAR2(A)
      • Refutation
        • S(f);XR(G)
  • Actual
    • P(F);
    • Threat
      • QAB1(A)
    • Vars
      • B(c);CHECK,N_GUARD::R1(G),XB(c)
      • R(g);XP(F)::S(E),XR(g)
      • Q(a);SBLOCK::QAB(A)
      • B(c);N_GUARD::QAR1(A),XB(c)
      • S(b);OGATE,P_PINQ(A)::QAB(A),XQ(a)
      • S(b);P_PINQ(A),SBLOCK::S(E)
      • S(f);N_GUARD,SBLOCK::R(G),XP(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).