MESON Chess Problem Database

Problem Display
PID: 100959 (4r3/1p1N2NB/3n4/3p1p1Q/1K1k3P/1R6/6b1/6r1 w - - 0 1)

Gagliano, Joseph

Good Companions, 1920

4r3/1p1N2NB/3n4/3p1p1Q/1K1k3P/1R6/6b1/6r1

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qg4#
    • 1...Se4
      • 2.Sxf5#
    • 1...f4
      • 2.Rd3#
  • Tries
    • 1.Sxf5+?
      • 1...Ke4
        • 2.Qg4#
      • 1...Sxf5!
    • 1.Se6+?
      • 1...Ke4
        • 2.Qe2#
        • 2.Qg4#
      • 1...Rxe6!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qg4#
      • 1...Rxd1!
  • Keys
    • 1.Qg4+!
      • 1...Re4
        • 2.Se6#
      • 1...Be4
        • 2.Qxg1#
      • 1...Se4
        • 2.Sxf5#
      • 1...fxg4
        • 2.Rd3#
      • 1...f4
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT,P_SPINP(e)::QAR2(D)
    • S(f);N_GUARD,SBLOCK::S(F),XP(e)
    • P(e);::R1(A)
  • Tries
    • Try
      • S(F);CHECK,XP(e)
      • Vars
        • K(c);P-FLIGHT::QAR2(D)
      • Refutation
        • S(f);XS(F)
    • Try
      • S(F);CHECK
      • Refutation
        • R(h);XS(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e)::QAR2(D)
      • Refutation
        • R(a);XQ(D)
  • Actual
    • Q(D);CHECK
    • Vars
      • R(h);P_SPINR(h)::S(F)
      • B(b);OGATE,P_SPINB(b),SBLOCK::QAB(D),XR(a)
      • S(f);P_SPINS(f)::S(F),XP(e)
      • P(e);XQ(D)::R1(A)
      • P(e);P_SPINP(e)::R1(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).