MESON Chess Problem Database

Problem Display
PID: 216262 (8/1R2p3/3pQp2/N1kN1P1K/p1bb4/3Rrp2/qn3B2/8 w - - 0 1)

Gray, Alexander

Australasian (The), 1881

8/1R2p3/3pQp2/N1kN1P1K/p1bb4/3Rrp2/qn3B2/8

#2

8 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Bxd4#
    • 1...Re2
      • 2.Bxd4#
    • 1...Re5
      • 2.Bxd4#
    • 1...Bc3
      • 2.Qc8#
    • 1...Be5
      • 2.Qc8#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qc6#
      • 1...Bxd5
        • 2.Rb5#
        • 2.Qb5#
      • 1...Bb5
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Kxd5!
    • 1.Qxe3?
      • threat
        • 2.Qxd4#
      • 1...Kxd5
        • 2.Qxd4#
      • 1...Bxe3
        • 2.Bxe3#
      • 1...e5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qc8#
      • 1...Rxe6
        • 2.Bxd4#
      • 1...Bxe6
        • 2.Rb5#
      • 1...Bb5
        • 2.Rxb5#
      • 1...Bd5
        • 2.Rb5#
      • 1...d5
        • 2.Qb6#
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(c);OGATE,P_SPINB(g)::B(A),XB(g)
    • R(c);OGATE,P_PINP(E),P_SPINB(g)::B(A),XB(g)
    • B(g);P_SPINR(c)::QAR(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Refutation
        • K(h);P-FLIGHT,P_SPINB(g),P_SPINP(i),XS(D)
    • Try
      • Q(G);P_PINB(g),XR(c)
      • Threat
        • QAB1(G),XB(g)
      • Vars
        • K(h);P-FLIGHT,XS(D)::QAR1(G),XB(g)
        • B(g);OGATE,XQ(G)::B(A),XB(g)
      • Refutation
        • P(k);
  • Actual
    • S(D);
    • Threat
      • QAR(G)
    • Vars
      • R(c);OGATE,P_SPINB(g),XQ(G)::B(A),XB(g)
      • B(f);N_GUARD,XQ(G)::R1(H)
      • B(f);N_GUARD::R1(H),XB(f)
      • B(f);N_GUARD::R1(H)
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).