MESON Chess Problem Database

Problem Display
PID: 30771 (2NrR3/5Rp1/4n1P1/1B1k3K/5r1p/2pNPP1p/2P4P/7Q w - - 0 1)

Barry, Henry William

American Chess Bulletin, 1910

2NrR3/5Rp1/4n1P1/1B1k3K/5r1p/2pNPP1p/2P4P/7Q

#2

12 + 8

2638 White to Play 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Qxf3#
    • 1...Ra4
      • 2.Rf5#
    • 1...Rb4
      • 2.Rf5#
    • 1...Rc4
      • 2.Rf5#
    • 1...Rd4
      • 2.Rf5#
    • 1...Re4
      • 2.fxe4#
    • 1...Rg4
      • 2.Rf5#
      • 2.fxg4#
    • 1...Rf5+
      • 2.Rxf5#
    • 1...Rf6
      • 2.f4#
    • 1...Rxf7
      • 2.f4#
    • 1...Rd6
      • 2.Se7#
    • 1...Rd7
      • 2.Rxd7#
    • 1...Rxc8
      • 2.Rd7#
    • 1...Rxe8
      • 2.Rd7#
    • 1...Sd4
      • 2.Re5#
    • 1...Sc5
      • 2.Sxf4#
      • 2.Re5#
    • 1...Sg5
      • 2.Re5#
    • 1...Sc7
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
  • Tries
    • 1.Bc6+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Kxc6!
    • 1.e4+?
      • 1...Kd4
        • 2.Qg1#
      • 1...Rxe4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa8#
      • 1...Rf5+
        • 2.Rxf5#
      • 1...Rxf7
        • 2.Qa2#
      • 1...Rxc8
        • 2.Rd7#
      • 1...Ra4
        • 2.Rf5#
      • 1...Rc4
        • 2.Rf5#
      • 1...Rd6
        • 2.Se7#
      • 1...Rd7
        • 2.Rxd7#
      • 1...Sd4
        • 2.Re5#
      • 1...Sc5
        • 2.Sxf4#
        • 2.Re5#
      • 1...Sc7
        • 2.Re5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE,P_SPINR(c),XP(F)::QAB(A),XR(c)
    • R(c);N_GUARD::R(J)
    • R(c);OGATE::P(F),XR(c)
    • R(c);CHECK,N_GUARD::R(J),XR(c)
    • R(c);OGATE::QAB(A)+P(F)
    • R(c);OGATE,XR(J)::QAB(A)+P(F)
    • R(h);SBLOCK::S(K)
    • R(h);N_GUARD::R(J),XR(h)
    • R(h);N_GUARD,XS(K)::R(J)
    • R(h);N_GUARD,XR(L)::R(J)
    • S(f);OGATE::R1(L)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(e);S_FLIGHT::S(K)
      • Refutation
        • K(e);S_FLIGHT,XB(G)
    • Try
      • P(E);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB(A)
      • Refutation
        • R(c);XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(c);CHECK,N_GUARD::R(J),XR(c)
      • R(c);N_GUARD,XR(J)::QAB(A)
      • R(h);N_GUARD,XS(K)::R(J)
      • R(c);N_GUARD::R(J)
      • R(h);SBLOCK::S(K)
      • R(h);N_GUARD::R(J),XR(h)
      • S(f);OGATE::R1(L)
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).