MESON Chess Problem Database

Problem Display
PID: 248608 (1B4B1/4r2p/6nR/5k1K/1p2Np1p/1Qb5/4R3/8 w - - 0 1)

Evans, TC

British Chess Magazine, 1932

1B4B1/4r2p/6nR/5k1K/1p2Np1p/1Qb5/4R3/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qf7#
    • 1...Re6
      • 2.Bxe6#
      • 2.Qxe6#
    • 1...Ra7
      • 2.Be6#
      • 2.Qe6#
    • 1...Rb7
      • 2.Be6#
      • 2.Qe6#
    • 1...Rc7
      • 2.Qe6#
    • 1...Rd7
      • 2.Be6#
      • 2.Qe6#
    • 1...Rg7
      • 2.Be6#
      • 2.Qe6#
    • 1...Ba1
      • 2.Qh3#
    • 1...Be1
      • 2.Qh3#
    • 1...Bb2
      • 2.Qh3#
    • 1...Bd2
      • 2.Qh3#
    • 1...Bd4
      • 2.Qh3#
    • 1...Be5
      • 2.Qh3#
    • 1...Bf6
      • 2.Sd6#
      • 2.Qh3#
    • 1...Bg7
      • 2.Qh3#
    • 1...Bh8
      • 2.Qh3#
    • 1...Se5
      • 2.Sd6#
      • 2.Rf6#
    • 1...Sf8
      • 2.Sd6#
    • 1...Sh8
      • 2.Sd6#
  • Tries
    • 1.Qd5+?
      • 1...Re5
        • 2.Be6#
        • 2.Qf7#
      • 1...Se5
        • 2.Sd6#
        • 2.Rf6#
      • 1...Be5!
    • 1.Qf7+?
      • 1...Bf6
        • 2.Sd6#
        • 2.Qxf6#
      • 1...Rxf7!
  • Keys
    • 1.Be5!
      • threat
        • 2.Sd6#
      • 1...Kxe5
        • 2.Qd5#
      • 1...Rxe5
        • 2.Qf7#
      • 1...Bxe5
        • 2.Qh3#
      • 1...Re6
        • 2.Qxe6#
      • 1...Rd7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • R(g);N_GUARD,S_CUTB(a)::QAR2(B)
    • R(g);N_GUARD::QAB1(B)
    • B(a);OGATE::QAB(B)
    • S(f);::S(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Refutation
        • R(g);XQ(B)
  • Actual
    • B(F);
    • Threat
      • S(C)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XB(F)::QAR1(B)
      • R(g);N_GUARD,SBLOCK,XB(F)::QAR2(B)
      • B(a);OGATE,SBLOCK,XB(F)::QAB(B)
      • R(g);N_GUARD::QAB1(B),XR(g)
      • R(g);N_GUARD::QAB1(B)
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).