MESON Chess Problem Database

Problem Display
PID: 237999 (8/Q1P4K/8/RN6/2P1k3/6p1/5pP1/3N1R2 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Revista Romana de Sah, 1971

8/Q1P4K/8/RN6/2P1k3/6p1/5pP1/3N1R2

#2

9 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kg6?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe3#
      • 1...Kd3!
    • 1.Sbc3+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd3!
    • 1.Sd6+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd3!
    • 1.Rxf2?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kd3
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe3#
      • 1...gxf2!
    • 1.c8Q?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe3#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kd3!
    • 1.c8B?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe3#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kd3!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe3#
      • 1...Kf4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR2(G)
        • K(c);P-FLIGHT::QAR2(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR2(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR2(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAR1(G)
        • K(c);P-FLIGHT::QAR2(G)
      • Refutation
        • P(b);XR(B)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(G)
        • K(c);P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(G)
        • K(c);P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAR1(G)
    • Vars
      • K(c);S_FLIGHT::QAR1(G)
      • K(c);P-FLIGHT,P_SPINP(a)::QAR2(G)
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).