MESON Chess Problem Database

Problem Display
PID: 21273 (8/8/8/1B6/3p2p1/Rr1P2K1/QP1NkP1p/1N5R w - - 0 1)

Bernard, Henry D'Oyly

Chess Amateur (The), 1918

8/8/8/1B6/3p2p1/Rr1P2K1/QP1NkP1p/1N5R

#2

10 + 5

2681 All Change Here! 1919
23 Die Schwalbe 1928
934 Social Chess Quarterly (The) 1934

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Qe6#
    • 1...Rxa3
      • 2.Qe6#
    • 1...Rc3
      • 2.Qe6#
    • 1...Rxd3+
      • 2.Bxd3#
    • 1...Rb4
      • 2.Qe6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sxd4#
        • 2.Re1#
      • 1...Rxd3
        • 2.Bxd3#
        • 2.Re1#
        • 2.Qe6#
        • 2.b3#
        • 2.b4#
      • 1...Rb4
        • 2.Re1#
        • 2.Qe6#
        • 2.b3#
      • 1...gxf3!
  • Keys
    • 1.Se4!
      • 1...Rxd3+
        • 2.Bxd3#
      • 1...Rxb2
        • 2.Qxb2#
      • 1...Rxa3
        • 2.bxa3#
      • 1...Rxb5
        • 2.b4#
      • 1...Rc3
        • 2.bxc3#
      • 1...Rb4
        • 2.b3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_PINP(H),OGATE,XP(D)::QAR(C)
    • R(c);OGATE,XR(G)::QAR(C)
    • R(c);OGATE::QAR(C)
    • R(c);CHECK,OGATE,P_SPINR(c),XP(H)::B(J),XR(c)
    • R(c);N_PINP(H),OGATE::QAR(C)
  • Tries
    • Try
      • S(E);N_SPINP(H)
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);XS(E)
  • Actual
    • S(E);
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XP(H)::B(J),XR(c)
      • R(c);N_PINP(H),OGATE,P_SPINR(c),XP(D)::QAR(C),XR(c)
      • R(c);OGATE,XR(G)::QAR(C)+P(D),XR(c)
      • R(c);N_PINP(H),OGATE,XB(J)::QAR(C)+P(D)
      • R(c);OGATE::QAR(C)+P(D),XR(c)
      • R(c);N_PINP(H),OGATE::QAR(C)+P(D)
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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).