MESON Chess Problem Database

Problem Display
PID: 99065 (6B1/8/5R1p/1N1ppp1K/4k3/1p2p3/4Q3/8 w - - 0 1)

Bruchner, Siegfried

Magyar Sakkelet, 1989

6B1/8/5R1p/1N1ppp1K/4k3/1p2p3/4Q3/8

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qg4#
    • 1...f4
      • 2.Bh7#
  • Tries
    • 1.Sc3+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd4!
    • 1.Sd6+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd4!
    • 1.Bxd5+?
      • 1...Kf4
        • 2.Qf3#
        • 2.Qg4#
        • 2.Qh2#
      • 1...Kxd5!
    • 1.Qf1?
      • threat
        • 2.Qxf5#
      • 1...f4
        • 2.Bh7#
      • 1...e2!
    • 1.Qg4+?
      • 1...fxg4
        • 2.Bh7#
      • 1...f4
        • 2.Bh7#
      • 1...Kd3!
    • 1.Qg2+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd3!
  • Keys
    • 1.Rxf5!
      • 1...Kxf5
        • 2.Qf3#
      • 1...b2
        • 2.Qc2#
      • 1...d4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
    • P(f);OGATEB::B(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT
    • Try
      • B(E);CHECK,XP(d)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XB(E)
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • QAB1(A),XP(f)
      • Vars
        • P(f);OGATEB::B(E)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK,N_PINP(b)
      • Vars
        • P(f);XQ(A)::B(E)
        • P(f);P_SPINP(f)::B(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(D);XP(f)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT,XR(D)::QAR2(A)
      • P(a);N_GUARD::QAB(A)
      • P(d);SBLOCK::S(B)
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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).