MESON Chess Problem Database

Problem Display
PID: 169408 (b7/4K3/p4P2/2P4R/Q2qk3/1N1p1RP1/1Bn3r1/b5N1 w - - 0 1)

Hawes, Frederick Thomas

Ravenscroft, Frank

4th Prize, South African Chess Player, 1958

b7/4K3/p4P2/2P4R/Q2qk3/1N1p1RP1/1Bn3r1/b5N1

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Re5#
    • 1...Qb4
      • 2.Re5#
    • 1...Qc4
      • 2.Re5#
    • 1...Rxg1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rxg3
      • 2.Sd2#
    • 1...Se1
      • 2.Qxd4#
    • 1...Sa3
      • 2.Qxd4#
    • 1...Se3
      • 2.Rf4#
      • 2.Qxd4#
  • Tries
    • 1.Re3+?
      • 1...Sxe3
        • 2.Qxd4#
      • 1...Kxe3!
    • 1.Qc6+?
      • 1...Qd5
        • 2.Rh4#
        • 2.Re5#
      • 1...Bxc6!
    • 1.c6?
      • threat
        • 2.Sc5#
      • 1...Rxg1
        • 2.Sd2#
      • 1...Sb4!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qg6#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Qxf6+
        • 2.Kxf6#
      • 1...Qd6+
        • 2.Kxd6#
      • 1...Qd7+
        • 2.Kxd7#
      • 1...Qd8+
        • 2.Kxd8#
      • 1...Qxg1
        • 2.Qxa8#
      • 1...Rxg1
        • 2.Sd2#
      • 1...Rxg3
        • 2.Sd2#
      • 1...Qd5
        • 2.Rh4#
      • 1...Se3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 6
  • Sets
    • Q(e);N_SPINQ(e),XQ(F)::R1(H)
    • Q(e);P_PINP(G)::R1(H)
    • Q(e);::R1(H)
    • R(c);N_GUARD,XS(A)::S(C)
    • R(c);N_GUARD::S(C),XR(c)
    • R(c);N_GUARD,XP(E)::S(C)
    • S(b);N_GUARD::QAR1(F),XQ(e)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • S(b);XR(D)::QAR1(F),XQ(e)
      • Refutation
        • K(f);N_SPINQ(e),P-FLIGHT,XR(D)
    • Try
      • Q(F);CHECK,N_PINQ(e)
      • Refutation
        • B(h);XQ(F)
    • Try
      • P(G);
      • Threat
        • S(C)
      • Vars
        • R(c);N_GUARD,XS(A)::S(C)
      • Refutation
        • S(b);N_SPINQ(e)
  • Actual
    • Q(F);N_PINQ(e)
    • Threat
      • QAB(F)
    • Vars
      • Q(e);CHECK,XP(G)::S(C),XQ(e)
      • Q(e);CHECK,N_GUARD::R1(H),XQ(e)
      • Q(e);CHECK,XP(I)::QAR(F)+K(J),XQ(e)
      • Q(e);CHECK::QAR(F)+K(J),XQ(e)
      • Q(e);N_GUARD,XS(A)::QAB(F),XB(h)
      • R(c);N_GUARD,XS(A)::S(C)
      • R(c);N_GUARD,XP(E)::S(C)
      • Q(e);SBLOCK::R(H)
      • S(b);SBLOCK::R1(D)
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).