MESON Chess Problem Database

Problem Display
PID: 60139 (2r5/1Q1BR2p/n1rp3K/3k4/P3p2p/1N3p2/1N1P1q2/3R4 w - - 0 1)

Keirans, Peteris

2nd HM., Brisbane Courier, 1928

2r5/1Q1BR2p/n1rp3K/3k4/P3p2p/1N3p2/1N1P1q2/3R4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3+
      • 2.dxe3#
    • 1...Qxd2+
      • 2.Rxd2#
    • 1...Ra8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Rb8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Rd8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Re8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Rf8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Rg8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Rh8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Sc7
      • 2.Bxc6#
      • 2.Qxc6#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Be6#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qxd2+
        • 2.Se3#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sc7
        • 2.Qxc6#
      • 1...e3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE::R(A)+P(C),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XP(C)::R(A),XQ(a)
  • Actual
    • S(B);
    • Threat
      • B(H)
    • Vars
      • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • Q(a);CHECK,N_GUARD,P_SPINQ(a),XP(C)::S(B)
      • K(e);N_SPINR(g),S_FLIGHT,XS(B)::QAB1(G)
      • S(f);S_CUTQ(a)::S(B)
      • S(f);S_CUTR(j)::QAB1(G),XR(g)
      • P(c);S_CUTQ(a)::S(B)
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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).