MESON Chess Problem Database

Problem Display
PID: 172313 (8/6K1/3N4/5QRp/7k/7n/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/6K1/3N4/5QRp/7k/7n/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rg3?
      • threat
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Sg1
        • 2.Qf4#
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Qxf4#
        • 2.Qg5#
      • 1...Sg5
        • 2.Qf4#
        • 2.Qxg5#
      • 1...Kxg3!
    • 1.Qd3?
      • threat
        • 2.Qg3#
      • 1...Kxg5
        • 2.Qg3#
      • 1...Sxg5!
    • 1.Qxh3+?
      • 1...Kxg5
        • 2.Qg3#
      • 1...Kxh3!
    • 1.Qe4+?
      • 1...Kxg5
        • 2.Sf7#
      • 1...Sf4!
    • 1.Qf2+?
      • 1...Kxg5
        • 2.Qg3#
      • 1...Sxf2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Rxh5#
        • 2.Qxh5#
        • 2.Qg3#
      • 1...Kxg5
        • 2.Qg3#
      • 1...Sxg5
        • 2.Sf5#
      • 1...Sf4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAR2(A)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(B)::S(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAR2(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);S_FLIGHT,XR(B)::QAR2(A)
      • S(a);SBLOCK,XR(B)::S(C)
      • S(a);::QAB1(A)
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).