MESON Chess Problem Database

Problem Display
PID: 58937 (8/1R6/2Q5/k2r4/8/3n4/8/K7 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Troll, 1997

8/1R6/2Q5/k2r4/8/3n4/8/K7

#2

3 + 3

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Rd6
      • 2.Qb5#
    • 1...Rd7
      • 2.Qb5#
    • 1...Rd8
      • 2.Qb5#
    • 1...Sc5
      • 2.Qb5#
  • Tries
    • 1.Rb5+?
      • 1...Ka4
        • 2.Qa6#
      • 1...Rxb5!
    • 1.Rb8?
      • threat
        • 2.Qa8#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rd6
        • 2.Qb5#
      • 1...Rd7
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb5#
      • 1...Sb4!
    • 1.Qxd5+?
      • 1...Ka4
        • 2.Qa2#
      • 1...Ka6
        • 2.Qb5#
      • 1...Sc5!
    • 1.Qe8?
      • threat
        • 2.Qa8#
      • 1...Ka6
        • 2.Qa8#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rd6
        • 2.Qb5#
      • 1...Rd8
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb5#
      • 1...Sb4!
    • 1.Qc7+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Ka4!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Qa8#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Sb4
        • 2.Ra3#
      • 1...Rd6
        • 2.Qb5#
      • 1...Rd7
        • 2.Qb5#
      • 1...Rd8
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb5#

Anticipated by 2546(1895)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::QAR1(B)
    • R(c);N_GUARD::QAR1(B),XR(c)
    • S(a);S_CUTR(c)::QAR1(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • R(c);XR(C)
    • Try
      • R(C);
      • Threat
        • QAR(B)
      • Vars
        • R(c);N_GUARD::QAR1(B),XR(c)
        • R(c);N_GUARD::QAR1(B)
        • S(a);S_CUTR(c)::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);CHECK,XR(c)
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • R(c);N_GUARD::QAR1(B),XR(c)
        • R(c);N_GUARD::QAR1(B)
        • S(a);S_CUTR(c)::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAR(B)
    • Vars
      • R(c);N_GUARD::QAR1(B),XR(c)
      • S(a);SBLOCK::R(C)
      • R(c);N_GUARD::QAR1(B)
      • S(a);S_CUTR(c)::QAR1(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).