MESON Chess Problem Database

Problem Display
PID: 21542 (1b2R3/p7/Q3Np2/4krnR/2K5/8/1P1N4/8 w - - 0 1)

Alvey, George Clarence Vincent

Hampshire Telegraph and Post, 1919

(First published on Fri Dec 19 1919)

1b2R3/p7/Q3Np2/4krnR/2K5/8/1P1N4/8

#2

7 + 6

3360 Simple Two-move Themes 1924
56 The Problemist 2003
5293 A selection of chess problems by G. C. Alvey 2004
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4+
      • 2.Sd4#
    • 1...Se4
      • 2.Sf3#
  • Tries
    • 1.Sd4+?
      • 1...Se6
        • 2.Rxf5#
      • 1...Kf4!
    • 1.Sf4+?
      • 1...Se6
        • 2.Sd3#
        • 2.Sg6#
      • 1...Kxf4!
    • 1.Sc5+?
      • 1...Se6
        • 2.Sd3#
      • 1...Kf4!
    • 1.Sg7+?
      • 1...Se6
        • 2.Rxf5#
      • 1...Kf4!
    • 1.Sf8+?
      • 1...Se6
        • 2.Sg6#
      • 1...Kf4!
    • 1.Qb6?
      • threat
        • 2.Qd4#
        • 2.Qc5#
        • 2.Qxb8#
      • 1...Rf4+
        • 2.Sd4#
      • 1...Sxe6
        • 2.Qd4#
        • 2.Qxb8#
      • 1...Rf1
        • 2.Qc5#
      • 1...Rf2
        • 2.Qc5#
      • 1...Rf3
        • 2.Qc5#
      • 1...Bd6
        • 2.Qd4#
      • 1...Bc7
        • 2.Qd4#
        • 2.Qc5#
        • 2.Qxc7#
      • 1...Sf3
        • 2.Qc5#
        • 2.Qxb8#
      • 1...Se4
        • 2.Sf3#
        • 2.Qd4#
      • 1...Sf7
        • 2.Qd4#
        • 2.Qc5#
      • 1...axb6!
    • 1.Qc6?
      • threat
        • 2.Qd5#
        • 2.Qc5#
      • 1...Rf4+
        • 2.Sd4#
      • 1...Bd6
        • 2.Qd5#
      • 1...Se4
        • 2.Sf3#
        • 2.Qd5#
      • 1...Sxe6!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qc5#
      • 1...Rf4+
        • 2.Sd4#
      • 1...Sxe6
        • 2.Qg3#
      • 1...Bd6
        • 2.Qc3#
      • 1...Se4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,P_SPINS(c),SBLOCK::R(G)+S(F)
    • S(c);N_GUARD,P_SPINR(b),SBLOCK::S(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(c);OGATE,P_SPINR(b),P_SPINS(c)::R1(D),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • S(c);P_SPINR(b),P_SPINS(c)::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • S(c);OGATE,P_SPINR(b),P_SPINS(c)::R1(D),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • S(c);P_SPINR(b),P_SPINS(c)::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);CHECK,P_SPINS(c),SBLOCK::R(G)+S(F)
        • R(b);P_SPINS(c)::QAR2(E)
        • B(f);::QAB1(E)
      • Refutation
        • P(e);XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,P_SPINS(c),SBLOCK::R(G)+S(F)
        • B(f);::QAR1(E)
      • Refutation
        • S(c);P_SPINR(b),P_SPINS(c),XS(F)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • R(b);CHECK,P_SPINS(c),SBLOCK::R(G)+S(F)
      • S(c);P_SPINR(b),P_SPINS(c),XS(F)::QAB(E)
      • B(f);SBLOCK::QAB(E)
      • S(c);N_GUARD,P_SPINR(b),SBLOCK::S(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).