MESON Chess Problem Database

Problem Display
PID: 139989 (1K6/2N1R3/3b2pn/1p4p1/1r3kp1/1p2N3/4p2P/2Q3nB w - - 0 1)

Westbury, Eric Ernest

1st Prize, BCPS 034. Ty., 1938

1K6/2N1R3/3b2pn/1p4p1/1r3kp1/1p2N3/4p2P/2Q3nB

#2

7 + 11

56 The Problemist 1938
3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rxe4#
    • 1...Bc5
      • 2.Scd5#
    • 1...Bxc7+
      • 2.Qxc7#
    • 1...Sf5
      • 2.Sd5#
  • Tries
    • 1.Sg2+?
      • 1...Kf3
        • 2.Qe3#
      • 1...Kf5!
    • 1.Qe1?
      • threat
        • 2.Qg3#
      • 1...Sf5
        • 2.Sd5#
      • 1...g3
        • 2.Qxg3#
        • 2.hxg3#
      • 1...Bxc7+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxd6#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Bxc5
        • 2.Scd5#
      • 1...Bxe7
        • 2.Se6#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Re4
        • 2.Rxe4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sf3
        • 2.Sg2#
      • 1...Sf5
        • 2.Sd5#
      • 1...Sf7
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD::R1(F),XR(d)
    • B(i);N_PINS(E)::S(E)
    • B(i);CHECK,OGATE,XS(E)::QAB(A),XB(i)
    • S(k);SBLOCK::QAB(A)+S(D),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(k);SBLOCK::S(D)
      • Refutation
        • B(i);CHECK,XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XB(i)
    • Vars
      • B(i);CHECK,OGATE,XS(E)::QAB(A),XB(i)
      • B(i);N_PINS(E),XQ(A)::S(E)
      • B(i);N_PINS(E),XR(F)::S(E)
      • R(d);N_GUARD::QAR2(A),XR(d)
      • R(d);N_GUARD::R1(F),XR(d)
      • B(i);N_GUARD::QAB1(A),XB(i)
      • S(a);SBLOCK::S(D)
      • S(k);SBLOCK::S(D)
      • S(k);N_GUARD::R(F),XS(k)
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).