MESON Chess Problem Database

Problem Display
PID: 109328 (2n5/2P2N2/8/Q2pr1P1/1p1rk3/1P3RB1/1P3PK1/8 w - - 0 1)

Sawyer, HF

Montreal Gazette, 1897

2n5/2P2N2/8/Q2pr1P1/1p1rk3/1P3RB1/1P3PK1/8

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Rf4#
    • 1...Rf5
      • 2.Re3#
    • 1...Rxg5
      • 2.Sxg5#
    • 1...Sb6
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sd6#
    • 1...Se7
      • 2.Sd6#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Rf4#
        • 2.Qe2#
      • 1...Rd1
        • 2.Rf4#
      • 1...Rd2
        • 2.Rf4#
      • 1...Rd3
        • 2.Rf4#
        • 2.Qxd3#
      • 1...Rf5
        • 2.Re3#
        • 2.Qe2#
      • 1...Rc4!
    • 1.Qa6?
      • threat
        • 2.Rf4#
        • 2.Qe2#
      • 1...Rd1
        • 2.Rf4#
      • 1...Rd2
        • 2.Rf4#
      • 1...Rd3
        • 2.Rf4#
        • 2.Qxd3#
      • 1...Rf5
        • 2.Re3#
        • 2.Qe2#
      • 1...Rc4!
  • Keys
    • 1.Qb6!
      • 1...Rxg5
        • 2.Sxg5#
      • 1...Sxb6
        • 2.Sd6#
      • 1...Rd1
        • 2.Qe3#
      • 1...Rd2
        • 2.Qe3#
      • 1...Rd3
        • 2.Rf4#
      • 1...Rc4
        • 2.Qe3#
      • 1...Rf5
        • 2.Re3#
      • 1...Re6
        • 2.Qxe6#
      • 1...Re7
        • 2.Qg6#
      • 1...Re8
        • 2.Qg6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R1(E)
    • R(e);SBLOCK::R1(E)
    • R(e);P_PINB(F),XP(H)::S(J),XR(e)
    • S(f);N_GUARD::S(J)
    • S(f);N_GUARD::S(J),XS(f)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::R1(E)
        • R(b);P_PINP(B)::R1(E)
      • Refutation
        • R(b);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::R1(E)
        • R(b);P_PINP(B)::R1(E)
      • Refutation
        • R(b);
  • Actual
    • Q(G);
    • Vars
      • R(e);P_PINB(F),XP(H)::S(J),XR(e)
      • S(f);N_GUARD,XQ(G)::S(J)
      • R(b);OGATE::QAR1(G)
      • R(b);OGATE,P_PINP(B)::QAR1(G)
      • R(b);SBLOCK::R1(E)
      • R(e);SBLOCK::R1(E)
      • R(e);OGATEB::QAR2(G),XR(e)
      • R(e);N_GUARD::QAB(G)
      • S(f);N_GUARD::S(J),XS(f)
      • S(f);N_GUARD::S(J)
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).