MESON Chess Problem Database

Problem Display
PID: 121896 (8/3p4/2kp3Q/5P2/1R6/1NB5/K7/8 w - - 0 1)

Dorokhov, Yuri Georgievich

Source?, 1982

8/3p4/2kp3Q/5P2/1R6/1NB5/K7/8

#2

6 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qh1#
  • Tries
    • 1.Ka1?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Kb1?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Kb2?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Ka3?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Ba1?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Bb2?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Bd4?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Be5?
      • threat
        • 2.Qxd6#
      • 1...Kd5
        • 2.Qxd6#
      • 1...Kc7!
    • 1.Bf6?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7
        • 2.Qc1#
      • 1...d5!
    • 1.Bg7?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Bh8?
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7!
    • 1.Qe3?
      • 1...Kd5
        • 2.Qf3#
        • 2.Qe4#
      • 1...d5
        • 2.Qc5#
        • 2.Qb6#
      • 1...Kc7!
    • 1.Qf8?
      • 1...Kd5
        • 2.Qa8#
      • 1...d5
        • 2.Qc5#
      • 1...Kc7!
    • 1.Qg6?
      • 1...Kd5
        • 2.Qg2#
      • 1...Kc7!
  • Keys
    • 1.Qc1!
      • 1...Kd5
        • 2.Qh1#
      • 1...Kc7
        • 2.Bf6#
      • 1...d5
        • 2.Be5#

This anticipates 220518(1997)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(F),XP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(F),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(F)
        • K(a);P-FLIGHT::QAR(F)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(F);N_PINP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(F)
        • P(b);OGATE::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(F);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(F)
      • K(a);P-FLIGHT::QAR(F)+B(C)
      • P(b);SBLOCK::QAR(F)+B(C)
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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).