MESON Chess Problem Database

Problem Display
PID: 87828 (8/8/2Q5/4k1K1/8/5pN1/3rP3/6B1 w - - 0 1)

Sushkov, Yuri Akimovich

The Problemist, 2000

8/8/2Q5/4k1K1/8/5pN1/3rP3/6B1

#2

5 + 3

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qf6#
    • 1...Rd6
      • 2.Qe4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Bh2#
      • 1...Rxe2
        • 2.Bd4#
      • 1...Rd5
        • 2.Qe8#
      • 1...Rd4
        • 2.Bxd4#
      • 1...Rd6!
    • 1.Bc5?
      • threat
        • 2.Qe4#
      • 1...Rxe2
        • 2.Qd6#
      • 1...Rd5
        • 2.Qe8#
        • 2.Qf6#
      • 1...Rd4!
    • 1.Qc5+?
      • 1...Rd5
        • 2.Qe7#
      • 1...Ke6!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Sf5#
      • 1...Kd4
        • 2.Sf5#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Rd6
        • 2.Qe4#
      • 1...Rd4
        • 2.Se4#
      • 1...Rd5
        • 2.Qf6#

Anticipated by 18504(1956), 19179(1987)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAB1(E)
    • R(a);SBLOCK::QAR1(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • B(A)
      • Vars
        • R(a);N_GUARD,XP(B)::B(A)
        • R(a);SBLOCK::QAR(E)
        • R(a);N_GUARD::B(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • B(A);
      • Threat
        • QAR1(E)
      • Vars
        • R(a);N_GUARD,XP(B)::QAB1(E)
      • Refutation
        • R(a);
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);P_SPINR(a),SBLOCK::QAR2(E)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(A);
    • Threat
      • B(A)+S(C)
    • Vars
      • K(c);S_FLIGHT::S(C)
      • R(a);XP(B)::B(A)+S(C),XR(a)
      • R(a);SBLOCK::QAR1(E)
      • R(a);SBLOCK::B(A)+S(C)
      • R(a);SBLOCK::QAB1(E)
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).