MESON Chess Problem Database

Problem Display
PID: 227604 (3R4/6p1/2K5/Q2N2B1/2P5/pPNkP1n1/3p4/3B2nq w - - 0 1)

Hartong, Jan

Der Tijd, 1926

3R4/6p1/2K5/Q2N2B1/2P5/pPNkP1n1/3p4/3B2nq

#2

10 + 7

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5+
      • 2.Rxd5#
    • 1...Qh2
      • 2.Sb6#
      • 2.Sf6#
      • 2.Sc7#
      • 2.Se7#
    • 1...Qh5
      • 2.Sb6#
      • 2.Sf6#
      • 2.Sc7#
      • 2.Se7#
    • 1...Qh6+
      • 2.Sf6#
    • 1...Qh7
      • 2.Sb6#
      • 2.Sf6#
      • 2.Sc7#
      • 2.Se7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sf2#
        • 2.Sc5#
        • 2.Sdc3#
        • 2.Sdf6#
      • 1...Qh6+
        • 2.Sdf6#
      • 1...Kxe4
        • 2.Sc3#
      • 1...Qxe4
        • 2.Qc3#
      • 1...Qg2
        • 2.Sc5#
        • 2.Sdc3#
        • 2.Sdf6#
      • 1...Qf3
        • 2.Sc5#
        • 2.Sdc3#
        • 2.Sdf6#
      • 1...Qh2
        • 2.Sc5#
        • 2.Sdc3#
        • 2.Sdf6#
      • 1...Qh3
        • 2.Sf2#
        • 2.Sc5#
      • 1...Qh8
        • 2.Sf2#
        • 2.Sc5#
      • 1...S1e2
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sf3
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sh3
        • 2.Sc5#
        • 2.Sdc3#
        • 2.Sdf6#
      • 1...S3e2
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sf5
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sxe4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc5#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Qh6+
        • 2.Sf6#
      • 1...Ke4
        • 2.Sdc3#
      • 1...Se4
        • 2.Sb4#

This anticipates 250141(1927)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::R(J),XQ(b)
    • Q(b);CHECK,N_PINS(G)::R(J)+S(G)
  • Tries
    • Try
      • S(C);N_SPINS(G)
      • Threat
        • DUALS(4)
      • Vars
        • Q(b);CHECK::R(J)+S(G)
        • K(e);S_FLIGHT,XS(C)::S(G)
        • Q(b);P_PINS(G),SBLOCK,XS(C)::QAR1(F)
      • Refutation
        • S(f);XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::QAR2(F),XQ(b)
      • Q(b);CHECK,N_PINS(G)::R(J)+S(G)
      • K(e);N_PINS(G),S_FLIGHT::S(G)
      • S(f);N_PINS(G),SBLOCK::R(J)+S(G),DCHECK
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).