MESON Chess Problem Database

Problem Display
PID: 682 (Bb1Rn2Q/3q4/1pr5/2p1R2p/2Pk4/1P1N4/P1rpP2K/1N1n4 w - - 0 1)

Easter, Norris

1st Prize, British Chess Magazine, 1932

Bb1Rn2Q/3q4/1pr5/2p1R2p/2Pk4/1P1N4/P1rpP2K/1N1n4

#2

11 + 11

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxd5#
    • 1...Rd6
      • 2.Re4#
    • 1...Rc7
      • 2.Re4#
      • 2.Rexe8#
    • 1...Bxe5+
      • 2.Qxe5#
    • 1...Sd6
      • 2.Re7#
    • 1...Sc7
      • 2.Re6#
    • 1...h4
      • 2.Qxh4#
  • Tries
    • 1.Rxd7+?
      • 1...Rd6
        • 2.Re4#
        • 2.Rxe8#
      • 1...Sd6
        • 2.Re6#
        • 2.Ree7#
        • 2.Re8#
      • 1...Bd6!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sb5#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Rd6
        • 2.Re4#
      • 1...Sc3
        • 2.Sxc2#
      • 1...Sd6
        • 2.Re7#
      • 1...Sc7
        • 2.Re6#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(i);OGATE::R1(J),XQ(i)
    • R(h);N_PINR(H),N_SPINQ(i)::QAB(K)+R(H),DCHECK
    • B(j);CHECK,OGATE,P_SPINB(j),XR(H)::QAB1(K),XB(j)
    • S(k);N_PINR(H),N_SPINQ(i)::QAB(K)+R(H)
    • S(k);N_PINR(H)::QAB(K)+R(H)
    • P(f);OGATE::QAR(K),XP(f)
  • Tries
    • Try
      • R(J);CHECK,XQ(i)
      • Refutation
        • B(j);P_SPINB(j)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(j);CHECK,OGATE,P_SPINB(j),XR(H)::QAB1(K),XB(j)
      • K(d);N_SPINQ(i),S_FLIGHT::S(A)
      • R(h);N_PINR(H),N_SPINQ(i)::QAB(K)+R(H),DCHECK
      • S(a);SBLOCK::S(A),XR(b)
      • S(k);N_PINR(H),N_SPINQ(i)::QAB(K)+R(H)
      • S(k);N_PINR(H)::QAB(K)+R(H)
      • P(g);::S(A),XP(g)
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).