MESON Chess Problem Database

Problem Display
PID: 267123 (4KR2/3NpN2/1B2B3/3P4/p2qkb2/Q1pR4/4P3/8 w - - 0 1)

Hoek, Willem

Schakend Nederland, 1979

4KR2/3NpN2/1B2B3/3P4/p2qkb2/Q1pR4/4P3/8

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qe5
      • 2.Sc5#
    • 1...Qf6
      • 2.Sc5#
    • 1...Qg7
      • 2.Sc5#
    • 1...Qh8
      • 2.Sc5#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Bh2
      • 2.Sg5#
    • 1...Bg3
      • 2.Sg5#
    • 1...Be5
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Bd6
      • 2.Sg5#
    • 1...Bc7
      • 2.Sg5#
    • 1...Bb8
      • 2.Sg5#
    • 1...c2
      • 2.Rxd4#
  • Tries
    • 1.Bf5+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kxf5!
  • Keys
    • 1.Kxe7!
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Qb4+
        • 2.Qxb4#
      • 1...Bg5+
        • 2.Sxg5#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Qxb6
        • 2.Sf6#
      • 1...Qxd3
        • 2.Sf6#
      • 1...Qxd5
        • 2.Sf6#
      • 1...Bc1
        • 2.Sd6#
      • 1...Bd2
        • 2.Sd6#
      • 1...Bh2
        • 2.Sg5#
      • 1...Be3
        • 2.Sd6#
      • 1...Bg3
        • 2.Sg5#
      • 1...Be5
        • 2.Sg5#
      • 1...Bh6
        • 2.Sd6#
      • 1...Bc7
        • 2.Sg5#
      • 1...Bb8
        • 2.Sg5#
      • 1...Qg1
        • 2.Sf6#
      • 1...Qf2
        • 2.Sf6#
      • 1...Qe3
        • 2.Sf6#
      • 1...Qe5
        • 2.Sc5#
      • 1...Qg7
        • 2.Sc5#
      • 1...Qh8
        • 2.Sc5#
      • 1...Qc4
        • 2.Sf6#
      • 1...c2
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::S(G),XQ(c)
    • Q(c);N_GUARD::S(G)
    • Q(c);N_GUARD,P_PINR(J)::S(G)
    • Q(c);OGATEB::QAR(B),XQ(c)
    • B(e);N_GUARD::S(H)
    • B(e);N_GUARD::S(H),XB(e)
    • P(a);::R1(C),XQ(c)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINQ(c),S_FLIGHT,XP(D)::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT,XB(F)
  • Actual
    • K(I);P-FLIGHT,XP(f)
    • Vars
      • Q(c);CHECK,N_GUARD::S(G),XQ(c)
      • Q(c);CHECK,OGATEB::QAR(B),XQ(c)
      • B(e);CHECK,N_GUARD::S(H),XB(e)
      • Q(c);N_GUARD,XB(E)::S(G)
      • Q(c);N_GUARD,XR(C)::S(G)
      • Q(c);N_GUARD,XP(D)::S(G)
      • B(e);N_GUARD::S(H)
      • Q(c);N_GUARD::S(G)
      • Q(c);N_GUARD,P_PINB(F)::S(G)
      • Q(c);N_GUARD,P_PINS(H)::S(G)
      • P(a);::R1(C),XQ(c)
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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).