MESON Chess Problem Database

Problem Display
PID: 265954 (4n2K/1p1N3B/7R/r2kP3/6nR/1P2p3/1Q2p1q1/3r4 w - - 0 1)

den Toom, Cornelis

Schakend Nederland, 1984

4n2K/1p1N3B/7R/r2kP3/6nR/1P2p3/1Q2p1q1/3r4

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bg8#
    • 1...Rc5
      • 2.Sb6#
    • 1...Sxe5
      • 2.Qxe5#
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sc7
      • 2.Rd6#
    • 1...Sg7
      • 2.Rd6#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Sb6#
        • 2.Qc4#
      • 1...Sxe5
        • 2.Sb6#
        • 2.Qxe5#
      • 1...Sxh6
        • 2.Qc4#
      • 1...Sgf6
        • 2.Qc4#
      • 1...Sef6
        • 2.Qc4#
      • 1...Qe4
        • 2.Sb6#
        • 2.Bg8#
      • 1...Rc1
        • 2.Sb6#
        • 2.Qd3#
      • 1...Ra4
        • 2.Sb6#
        • 2.Qc5#
      • 1...Rb5
        • 2.Qc4#
      • 1...Rc5
        • 2.Sb6#
        • 2.Qxc5#
      • 1...Ra6
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sd6
        • 2.Sb6#
        • 2.Rxd6#
      • 1...b5
        • 2.Sb6#
        • 2.Qc5#
      • 1...b6
        • 2.Sxb6#
        • 2.Qc4#
      • 1...Rd4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...Sxe5
        • 2.Sb6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Rc1
        • 2.Qd3#
      • 1...Rd4
        • 2.Bg8#
      • 1...Ra4
        • 2.Qc5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(c);SBLOCK::B(G)
    • R(f);SBLOCK::S(F)
    • S(e);OGATE,XP(D)::QAR1(A),XS(e)
    • S(i);N_GUARD::R1(E),XS(i)
    • S(i);N_GUARD::R1(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);XR(E)::QAB1(A)
        • S(e);::QAB1(A)
        • S(i);::QAB1(A)
        • R(f);::QAB1(A)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(g);P-FLIGHT,P_SPINS(e)::QAR1(A)
      • S(e);SBLOCK,XP(D)::S(F)
      • Q(c);N_GUARD::QAB1(A),XQ(c)
      • R(a);N_GUARD::QAR2(A)
      • R(a);SBLOCK::B(G)
      • R(f);N_GUARD::QAR1(A)
      • R(f);N_GUARD::QAR1(A),XR(f)
      • S(i);N_GUARD::R1(E),XS(i)
      • P(h);S_CUTR(f)::QAR1(A)
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).