MESON Chess Problem Database

Problem Display
PID: 22740 (7Q/2B1p3/B2pP1p1/R1NkP3/1p1N4/2p1p3/b1P1P2b/3R3K w - - 0 1)

Jones, Christopher JAJ

The Problemist, 1998

7Q/2B1p3/B2pP1p1/R1NkP3/1p1N4/2p1p3/b1P1P2b/3R3K

#2

12 + 9

81 Chess 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Bb7#
    • 1...Bxe5
      • 2.Qa8#
    • 1...dxc5
      • 2.Qa8#
    • 1...dxe5
      • 2.Qa8#
      • 2.Qd8#
  • Tries
    • 1.Sb5+?
      • 1...Kc4
        • 2.Sa3#
        • 2.Sxd6#
        • 2.Sa7#
      • 1...Kxc5
        • 2.Sd4#
        • 2.Sa7#
      • 1...Kc6!
    • 1.Sd3+?
      • 1...Kxd4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Ke4!
    • 1.Bb5?
      • threat
        • 2.Sdb3#
      • 1...Kxc5
        • 2.Ba6#
      • 1...dxc5
        • 2.Qa8#
      • 1...Bb3
        • 2.Sdxb3#
      • 1...Bc4
        • 2.Bc6#
      • 1...b3
        • 2.Sdxb3#
      • 1...Bxe5!
    • 1.Bxd6?
      • threat
        • 2.Qa8#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...exd6!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Scb3#
      • 1...Kxd4
        • 2.Ba6#
      • 1...dxc5
        • 2.Qd8#
      • 1...Bb3
        • 2.Scxb3#
      • 1...Bc4
        • 2.Be4#
      • 1...b3
        • 2.Scxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::B(I)
    • B(b);SBLOCK,XP(H)::QAB(L)
    • P(g);P_SPINP(g),XS(G)::QAB(L)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(I);
      • Threat
        • R(A)+S(E)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XS(G)::R(F)+B(I)
        • P(g);SBLOCK,XS(G)::QAB(L)
        • B(a);::R(A)+S(E),XB(a)
        • B(a);SBLOCK::B(I)
        • P(e);::R(A)+S(E),XP(e)
      • Refutation
        • B(b);XP(H)
    • Try
      • B(K);XP(g)
      • Threat
        • QAB(L)
      • Vars
        • B(b);OGATE,XP(H)::QAR1(L),XB(b)
      • Refutation
        • P(i);XB(K)
  • Actual
    • B(I);
    • Threat
      • R(F)+S(G)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XS(E)::R(A)+B(I)
      • P(g);OGATEB,P_SPINP(g),XS(G)::QAR(L)
      • B(a);::R(F)+S(G),XB(a)
      • B(a);SBLOCK::B(I)
      • P(e);::R(F)+S(G),XP(e)
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).