MESON Chess Problem Database

Problem Display
PID: 207536 (4n2k/2R3r1/4PN1P/4Q3/7b/8/7R/K7 w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1872

4n2k/2R3r1/4PN1P/4Q3/7b/8/7R/K7

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Rh7#
    • 1...Rg3
      • 2.Rh7#
    • 1...Rg4
      • 2.Rh7#
    • 1...Rg5
      • 2.Rh7#
    • 1...Rg6
      • 2.Rh7#
    • 1...Rh7
      • 2.Rxh7#
    • 1...Rg8
      • 2.Rh7#
    • 1...Be1
      • 2.hxg7#
    • 1...Bf2
      • 2.hxg7#
    • 1...Bg3
      • 2.hxg7#
    • 1...Bg5
      • 2.hxg7#
    • 1...Sd6
      • 2.hxg7#
  • Tries
    • 1.Sxe8?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Bf6!
    • 1.Qg3?
      • 1...Rxg3
        • 2.Rh7#
      • 1...Rxc7
        • 2.Qg8#
      • 1...Bxg3
        • 2.hxg7#
      • 1...Sxf6
        • 2.Qxg7#
      • 1...Sxc7
        • 2.Qxg7#
        • 2.hxg7#
      • 1...Rg4
        • 2.Rh7#
      • 1...Rg5
        • 2.Rh7#
      • 1...Rg6
        • 2.Rh7#
      • 1...Rd7
        • 2.Qg8#
      • 1...Re7
        • 2.Qg8#
      • 1...Rf7
        • 2.Qg8#
      • 1...Rh7
        • 2.Rxh7#
        • 2.Qg8#
      • 1...Rg8
        • 2.Rh7#
        • 2.Qxg8#
      • 1...Bg5
        • 2.hxg7#
      • 1...Sd6
        • 2.Qxg7#
        • 2.hxg7#
      • 1...Bxf6+!
  • Keys
    • 1.Qg5!
      • 1...Rxg5
        • 2.Rh7#
      • 1...Rxc7
        • 2.Qg8#
      • 1...Bxg5
        • 2.hxg7#
      • 1...Sxf6
        • 2.Qxg7#
      • 1...Sxc7
        • 2.Qxg7#
        • 2.hxg7#
      • 1...Rg6
        • 2.Rh7#
      • 1...Rd7
        • 2.Qg8#
      • 1...Re7
        • 2.Qg8#
      • 1...Rf7
        • 2.Qg8#
      • 1...Rh7
        • 2.Rxh7#
        • 2.Qg8#
      • 1...Rg8
        • 2.Rh7#
        • 2.Qxg8#
      • 1...Be1
        • 2.hxg7#
      • 1...Bf2
        • 2.hxg7#
      • 1...Bg3
        • 2.hxg7#
      • 1...Sd6
        • 2.Qxg7#
        • 2.hxg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE::R1(G)
    • R(b);OGATE::R1(G),XR(b)
    • B(a);::R(B)+P(F)DCHECK,XR(b)
    • S(c);N_GUARD::P(F),XR(b)
  • Tries
    • Try
      • S(E);P_PINR(b),XS(c)
      • Threat
        • QAB1(C),XR(b)
      • Vars
        • K(d);P-FLIGHT::QAR1(C),XR(b)
        • K(d);N_SPINR(b),P-FLIGHT::QAR1(C),XR(b)
      • Refutation
        • B(a);N_SPINR(b),P_PINQ(C)
    • Try
      • Q(C);
      • Vars
        • R(b);OGATE,XQ(C)::R1(G)
        • R(b);OGATE,XR(G)::QAR1(C)
        • B(a);XQ(C)::R(B)+P(F)DCHECK,XR(b)
        • S(c);N_GUARD,XS(E)::QAB1(C),XR(b)
        • R(b);OGATE::R1(G)
        • R(b);OGATE::QAR1(C)
        • B(a);::R(B)+P(F)DCHECK,XR(b)
      • Refutation
        • B(a);CHECK,XS(E)
  • Actual
    • Q(C);
    • Vars
      • R(b);OGATE,XQ(C)::R1(G)
      • R(b);OGATE,XR(G)::QAR1(C)
      • B(a);XQ(C)::R(B)+P(F)DCHECK,XR(b)
      • S(c);N_GUARD,XS(E)::QAB1(C),XR(b)
      • R(b);OGATE::R1(G)
      • R(b);OGATE::QAR1(C)
      • B(a);::R(B)+P(F)DCHECK,XR(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).