MESON Chess Problem Database

Problem Display
PID: 227492 (8/4Kn2/8/1R5N/4k3/2Q5/1n6/8 w - - 0 1)

Gunning, H

Chess Amateur (The), 1926

8/4Kn2/8/1R5N/4k3/2Q5/1n6/8

#2

4 + 3

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Rxe5#
    • 1...Sg5
      • 2.Re5#
    • 1...Sd6
      • 2.Re5#
    • 1...Sh6
      • 2.Re5#
    • 1...Sd8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
  • Tries
    • 1.Rb4+?
      • 1...Kd5
        • 2.Sf4#
        • 2.Sf6#
      • 1...Kf5
        • 2.Qf6#
      • 1...Sc4!
  • Keys
    • 1.Rd5!
      • 1...Kxd5
        • 2.Sf6#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sg5
        • 2.Re5#
      • 1...Sd6
        • 2.Re5#
      • 1...Sh6
        • 2.Re5#
      • 1...Sd8
        • 2.Re5#
      • 1...Sh8
        • 2.Re5#

This anticipates 210566(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::R1(B),XS(c)
    • S(c);N_GUARD::R1(B)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • R(B);
    • Vars
      • K(b);S_FLIGHT,XR(B)::S(C)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(c);N_GUARD::R1(B),XS(c)
      • S(a);N_GUARD::QAB1(A)
      • S(c);N_GUARD::R1(B)
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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).