MESON Chess Problem Database

Problem Display
PID: 229073 (4K3/4p1B1/2pk1pr1/Q7/p7/r2p4/3RR3/7B w - - 0 1)

van Dijk, Johannes

Noord-Hollandsch Dagblad, 1926

4K3/4p1B1/2pk1pr1/Q7/p7/r2p4/3RR3/7B

#2

6 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rxd3#
    • 1...Ra2
      • 2.Rxd3#
    • 1...c5
      • 2.Qb6#
      • 2.Qd8#
    • 1...f5
      • 2.Qe5#
    • 1...e6
      • 2.Bf8#
  • Tries
    • 1.Qb4+?
      • 1...c5
        • 2.Qb6#
        • 2.Qb8#
      • 1...Kc7!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Re6#
      • 1...dxe2
        • 2.Bb3#
      • 1...cxd5
        • 2.Qb6#
      • 1...c5
        • 2.Qd8#
      • 1...f5
        • 2.Be5#
      • 1...e5
        • 2.Bf8#
      • 1...e6
        • 2.Bf8#
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::R(B),XP(b)
    • P(f);N_GUARD::QAB1(D)
    • P(h);OGATEB::B(E)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • K(e);N_SPINP(b),S_FLIGHT
  • Actual
    • B(A);N_PINP(b)
    • Threat
      • R1(C)
    • Vars
      • P(b);OGATEB,XR(C)::R(B)+B(A)
      • P(d);OGATEB,SBLOCK,XB(A)::QAR2(D)
      • P(d);SBLOCK::QAR2(D)
      • P(f);OGATE::B(E)
      • P(h);OGATEB::B(E)
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).