MESON Chess Problem Database

Problem Display
PID: 66767 (B2K4/B7/8/4p3/1p1p4/1RPrkp1N/1Q2P3/8 w - - 0 1)

Cheylan, Yves

Het Parool, 1974

B2K4/B7/8/4p3/1p1p4/1RPrkp1N/1Q2P3/8

#2

8 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Bxd4+?
      • 1...Rxd4+
        • 2.cxd4#
      • 1...exd4!
    • 1.cxb4?
      • threat
        • 2.Rxd3#
      • 1...fxe2
        • 2.Qc1#
      • 1...Rc3
        • 2.Rxc3#
      • 1...e4
        • 2.Bxd4#
      • 1...Rxb3!
  • Keys
    • 1.cxd4!
      • threat
        • 2.Rxd3#
      • 1...Rxb3
        • 2.dxe5#
      • 1...fxe2
        • 2.Qc1#
      • 1...Rc3
        • 2.dxe5#
      • 1...e4
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);CHECK,P_SPINB(F),XP(e)
      • Vars
        • R(a);CHECK,OGATE,XB(F)::R(C)+P(D),XR(a)
      • Refutation
        • P(f);XB(F)
    • Try
      • P(D);P_PINR(a),XP(d)
      • Threat
        • R1(C),XR(a)
      • Vars
        • P(c);SBLOCK,XP(B)::QAB(A)
        • R(a);OGATEB::R(C),XR(a)
        • P(f);N_GUARD::B(F),XP(e)
      • Refutation
        • R(a);N_SPINR(a),XR(C)
  • Actual
    • P(D);P_PINR(a),P_SPINP(D),XP(e)
    • Threat
      • R1(C),XR(a)
    • Vars
      • R(a);N_PINP(D),N_SPINR(a),XR(C)::B(F)+P(D),XP(f)
      • P(c);SBLOCK,XP(B)::QAB(A)
      • R(a);N_PINP(D)::B(F)+P(D),XP(f)
      • P(f);SBLOCK::B(F)+P(D)
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).