MESON Chess Problem Database

Problem Display
PID: 268059 (8/8/2K4B/4R3/4p3/2kpp3/P3P3/3Q4 w - - 0 1)

Koshel, Mikhail Igorevich

Mosiashvili-75 JT (Kudesnik), 2022

8/8/2K4B/4R3/4p3/2kpp3/P3P3/3Q4

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qb3#
  • Tries
    • 1.Bxe3?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Kc4
        • 2.Qb3#
      • 1...Kb2!
    • 1.Rxe4?
      • threat
        • 2.Bg7#
        • 2.Qc1#
      • 1...dxe2
        • 2.Bg7#
      • 1...d2
        • 2.Bg7#
        • 2.Qb3#
      • 1...Kb2!
    • 1.Rc5+?
      • 1...Kb4
        • 2.Qb3#
      • 1...Kd4
        • 2.Bg7#
        • 2.Qa4#
        • 2.Qa1#
      • 1...Kb2!
    • 1.Rd5?
      • 1...Kb4
        • 2.Qb3#
      • 1...Kc4
        • 2.Qb3#
      • 1...dxe2
        • 2.Qb3#
      • 1...d2
        • 2.Qb3#
      • 1...Kb2!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Rd5#
      • 1...Kd2!
    • 1.Qc1+?
      • 1...Kd4
        • 2.Rd5#
        • 2.Qc5#
      • 1...Kb4!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Rxe4#
      • 1...Kb2
        • 2.Ra5#
      • 1...Kb4
        • 2.Qb3#
      • 1...Kc4
        • 2.Rxe4#
      • 1...Kd4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • B(F);XP(c)
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(C)::B(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
        • K(a);N_GUARD,P-FLIGHT::QAB1(A)
        • P(b);XP(C)::QAR1(A)
        • P(b);::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(D)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(F);
    • Threat
      • B(F)+R(D),XP(d)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::B(F)+R(D)
      • K(a);N_GUARD,S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::R(D),XP(d)
      • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::B(F)+R(D)
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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).