MESON Chess Problem Database

Problem Display
PID: 17156 (3R4/p1rN3B/8/K2bRq2/pP5N/r2k2P1/1Q3P2/8 w - - 0 1)

Akerblom, Johan Axel

4th Prize, Brisbane Courier, 1925

3R4/p1rN3B/8/K2bRq2/pP5N/r2k2P1/1Q3P2/8

#2

10 + 7

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Re3#
    • 1...Bc4
      • 2.Sc5#
      • 2.Bxf5#
  • Tries
    • 1.Rxd5+?
      • 1...Ke4
        • 2.Sf6#
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Rd4#
      • 1...Rc5+
        • 2.Sxc5#
      • 1...Ba2+
        • 2.Sc5#
      • 1...Bb3+
        • 2.Sc5#
      • 1...Bc4+
        • 2.Sc5#
      • 1...Bxe4+
        • 2.Se5#
      • 1...Bc6+
        • 2.Sc5#
      • 1...Be6+
        • 2.Sc5#
      • 1...Bb7+
        • 2.Sc5#
      • 1...Bf7+
        • 2.Sc5#
      • 1...Ba8+
        • 2.Sc5#
      • 1...Bg8+
        • 2.Sc5#
      • 1...Kxe4
        • 2.Bxf5#
      • 1...Qxe4
        • 2.Se5#
      • 1...Qxf2
        • 2.Se5#
      • 1...Rc2
        • 2.Qd4#
      • 1...Rac3
        • 2.Qe2#
      • 1...Rcc3
        • 2.Qe2#
      • 1...Rc4
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 17
    • REMOVED MATES = 0
  • Sets
    • R(g);SBLOCK::R1(G)
  • Tries
    • Try
      • R(G);CHECK,P_SPINR(G),XB(d)
      • Refutation
        • K(b);N_SPINQ(e),S_FLIGHT
  • Actual
    • R(G);N_PINQ(e)
    • Threat
      • R1(G)
    • Vars
      • R(g);CHECK,N_GUARD::S(H),XR(g)
      • B(d);CHECK::R(J)+S(H),DCHECK
      • B(d);CHECK,SBLOCK,XR(G)::R(J)+S(H),DCHECK
      • K(b);OGATEB,P_SPINQ(e),S_FLIGHT,XR(G)::B(I),XQ(e)
      • Q(e);N_GUARD,P_SPINQ(e),XR(G)::S(H)
      • Q(e);N_GUARD,XP(B)::S(H)
      • R(g);SBLOCK::QAR1(A)
      • R(a);SBLOCK::QAB1(A)
      • R(g);SBLOCK::QAB1(A)
      • R(g);SBLOCK::R1(G)
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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).