MESON Chess Problem Database

Problem Display
PID: 214743 (Q3brqB/2RpbP2/1ppp1PpN/3Pk3/5Rp1/4N1P1/1n5n/7K w - - 0 1)

Seymour, Robert Hoe

Detroit Free Press, 1877

Q3brqB/2RpbP2/1ppp1PpN/3Pk3/5Rp1/4N1P1/1n5n/7K

#2

11 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6
      • 2.Bxf6#
    • 1...Sf1
      • 2.Shxg4#
    • 1...Sf3
      • 2.Shxg4#
    • 1...cxd5
      • 2.Qxd5#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qxb2#
      • 1...Sf3
        • 2.Shxg4#
      • 1...cxd5!
    • 1.Qa5?
      • threat
        • 2.Qc3#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Sd1
        • 2.Sc4#
      • 1...Sa4
        • 2.Sc4#
      • 1...Sf3
        • 2.Sexg4#
        • 2.Shxg4#
      • 1...bxa5!
    • 1.fxe7+?
      • 1...Qg7
        • 2.Bxg7#
      • 1...Qxh8!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qc3#
      • 1...dxc6
        • 2.Rxe7#
      • 1...Sd1
        • 2.Sc4#
      • 1...Sa4
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sf3
        • 2.Sexg4#
        • 2.Shxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(j);OGATE,P_SPINB(j),XP(F)::B(K),XB(j)
    • S(b);N_GUARD::S(G),XP(c)
    • P(f);OGATE,XP(E)::QAR1(J),XP(f)
  • Tries
    • Try
      • Q(J);P_PINS(a)
      • Threat
        • QAB(J),XS(a)
      • Vars
        • S(b);N_GUARD::S(G),XP(c)
      • Refutation
        • P(f);XP(E)
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • P(f);OGATE,P_SPINP(f),XP(E)::QAR1(J),XP(f)
        • S(a);N_GUARD::S(B)
      • Refutation
        • P(e);XQ(J)
    • Try
      • P(F);CHECK,XB(j)
      • Vars
        • Q(m);N_GUARD,P_SPINQ(m)::B(K),XQ(m)
      • Refutation
        • Q(m);XB(K)
  • Actual
    • Q(J);XP(f)
    • Threat
      • QAB(J)
    • Vars
      • P(i);OGATE,XQ(J)::R(H),XB(j)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
HTML5 logo

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).