MESON Chess Problem Database

Problem Display
PID: 134392 (B6N/8/3p1p1K/3R4/5kp1/8/6Q1/b7 w - - 0 1)

Grupen, Claus

Problem Observer, 2009

B6N/8/3p1p1K/3R4/5kp1/8/6Q1/b7

#2

5 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Rd3?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Sg6#
        • 2.Qg3#
      • 1...d5!
    • 1.Rd4+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bxd4!
    • 1.Rf5+?
      • 1...Kxf5
        • 2.Qe4#
      • 1...Ke3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Sg6#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Bxe5
        • 2.Qf2#
      • 1...dxe5
        • 2.Qf2#
      • 1...fxe5
        • 2.Qf2#
      • 1...g3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • B(a);XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XR(B)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • S(E)
    • Vars
      • K(b);S_FLIGHT,XR(B)::QAR1(A)
      • B(a);SBLOCK,XR(B)::QAR2(A)
      • P(d);SBLOCK,XR(B)::QAR2(A)
      • P(e);SBLOCK,XR(B)::QAR2(A)
      • P(c);SBLOCK::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).