MESON Chess Problem Database

Problem Display
PID: 268408 (8/4p3/1p5K/rB2P1R1/1N3k1p/7r/4Q3/7b w - - 0 1)

Gamza, Grigory Stepanovich

Shakhmatnaya kompozitsiya, 1996

8/4p3/1p5K/rB2P1R1/1N3k1p/7r/4Q3/7b

#2

6 + 7

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Sd3#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Re3
      • 2.Qg4#
    • 1...Rf3
      • 2.Sd5#
    • 1...Bf3
      • 2.Sd3#
    • 1...Bd5
      • 2.Sxd5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qg4#
      • 1...Rf3
        • 2.Qc4#
      • 1...Bf3
        • 2.Qe3#
      • 1...Rg3!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Rg4#
      • 1...Rxd3
        • 2.Sxd3#
      • 1...Rg3
        • 2.Rf5#
      • 1...Re3
        • 2.Qg4#
      • 1...Rf3
        • 2.Qe4#
      • 1...Bf3
        • 2.Qd2#
      • 1...Be4
        • 2.Qxe4#

Anticipated by 18544(1956)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::S(B)
    • R(b);N_GUARD::S(B),XR(b)
    • R(b);SBLOCK::QAR1(A)
    • R(b);S_CUTB(a)::S(B)
    • B(a);S_CUTR(b)::S(B)
    • B(a);N_GUARD::S(B),XB(a)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);SBLOCK,S_CUTB(a)::QAR(A)
        • B(a);S_CUTR(b)::QAB1(A)
      • Refutation
        • R(b);
  • Actual
    • B(C);
    • Threat
      • R1(E)
    • Vars
      • R(b);XB(C)::S(B),XR(b)
      • R(b);SBLOCK::R1(E)
      • R(b);SBLOCK::QAR1(A)
      • R(b);S_CUTB(a)::QAR1(A)
      • B(a);SBLOCK,S_CUTR(b)::QAB(A)
      • B(a);N_GUARD::QAR1(A),XB(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).