MESON Chess Problem Database

Problem Display
PID: 70415 (B7/1n4bb/2r1p3/1p1kppR1/1Q6/1P3P2/1BN3n1/7K w - - 0 1)

Evans, DW

Chess, 1950

B7/1n4bb/2r1p3/1p1kppR1/1Q6/1P3P2/1BN3n1/7K

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxb5#
    • 1...Se1
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf4
      • 2.Se3#
    • 1...Sh4
      • 2.Se3#
    • 1...e4
      • 2.fxe4#
    • 1...f4
      • 2.Qd4#
  • Tries
    • 1.Qxb5+?
      • 1...Rc5
        • 2.Qd7#
      • 1...Sc5
        • 2.Qxc6#
      • 1...Kd6!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Qd2#
      • 1...Rxc2
        • 2.Qd6#
      • 1...Rc3
        • 2.Qd6#
      • 1...Rc4
        • 2.Qd6#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Ra6
        • 2.Qc5#
        • 2.Qxb5#
      • 1...Rb6
        • 2.Qc5#
      • 1...Rd6
        • 2.Qc5#
        • 2.Qxd6#
        • 2.Qxb5#
      • 1...Rc7
        • 2.Qd6#
      • 1...Rc8
        • 2.Qd6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e4
        • 2.Qxe4#
      • 1...Se1
        • 2.Se3#
      • 1...Sf4
        • 2.Se3#
      • 1...f4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,P_SPINS(h),SBLOCK::QAR2(F),XP(b)
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • P(d);OGATE,P_SPINP(e)::P(E),XP(d)
    • P(e);P_SPINP(d)::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK,XP(b)
      • Vars
        • R(f);OGATE,P_SPINR(f),P_SPINS(h),SBLOCK::QAR2(F)
        • S(h);P_SPINR(f),P_SPINS(h)::QAB1(F),XR(f)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAR(F)
    • Vars
      • R(f);N_GUARD,P_SPINS(h),XS(C)::QAR1(F)
      • R(f);N_GUARD,P_SPINS(h)::QAR1(F)
      • R(f);N_GUARD,P_SPINS(h)::QAR1(F),XR(f)
      • S(h);N_GUARD,P_SPINR(f)::QAR1(F),XS(h)
      • P(d);P_SPINP(e)::QAB1(F),XP(d)
      • S(a);N_GUARD::S(C)
      • P(e);P_SPINP(d)::QAR1(F)
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).