MESON Chess Problem Database

Problem Display
PID: 234821 (8/N5p1/pN2p1P1/P2pR3/1k6/2p5/P1p1p1p1/R1QbK1B1 w - - 0 1)

Dolginovich, Nikolai Osipovich

Hlas l'udu, 1980

8/N5p1/pN2p1P1/P2pR3/1k6/2p5/P1p1p1p1/R1QbK1B1

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa5
      • 2.Qa3#
    • 1...d4
      • 2.Sc6#
  • Tries
    • 1.Bc5+?
      • 1...Kxa5
        • 2.Qa3#
      • 1...Kxc5!
    • 1.Rg5?
      • 1...Kxa5
        • 2.Qa3#
      • 1...d4
        • 2.Sc6#
      • 1...e5!
    • 1.Rh5?
      • 1...Kxa5
        • 2.Qa3#
      • 1...d4
        • 2.Sc6#
      • 1...e5!
    • 1.Rxe6?
      • 1...Kxa5
        • 2.Qa3#
      • 1...d4!
    • 1.Qb2+?
      • 1...Kxa5
        • 2.Sc6#
        • 2.Qa3#
        • 2.Qxc3#
      • 1...cxb2!
    • 1.Qe3?
      • threat
        • 2.Qc5#
      • 1...Ka3
        • 2.Qxc3#
      • 1...Kxa5
        • 2.Qc5#
        • 2.Qxc3#
      • 1...d4!
    • 1.Qf4+?
      • 1...Kxa5
        • 2.Qa4#
      • 1...d4
        • 2.Qf8#
      • 1...Ka3!
    • 1.Qxc2?
      • 1...Ka3
        • 2.Bc5#
      • 1...Kxa5
        • 2.Qxc3#
      • 1...d4
        • 2.a3#
      • 1...Bxc2!
  • Keys
    • 1.a4!
      • 1...Kb3
        • 2.Qa3#
      • 1...Kxa5
        • 2.Sc6#
      • 1...d4
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);P_SPINP(g),S_FLIGHT,XP(F)::QAR2(B)
    • P(g);::S(J)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(f);S_FLIGHT,XP(F)::QAR2(B)
      • Refutation
        • K(f);P_SPINP(g),S_FLIGHT,XB(D)
    • Try
      • R(G);
      • Vars
        • K(f);P_SPINP(g),S_FLIGHT,XP(F)::QAR2(B)
        • P(g);::S(J)
      • Refutation
        • P(i);
    • Try
      • R(G);
      • Vars
        • K(f);P_SPINP(g),S_FLIGHT,XP(F)::QAR2(B)
        • P(g);::S(J)
      • Refutation
        • P(i);
    • Try
      • R(G);XP(i)
      • Vars
        • K(f);S_FLIGHT,XP(F)::QAR2(B)
      • Refutation
        • P(g);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(e);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(f);P_SPINP(e),S_FLIGHT::QAR2(B),XP(e)
      • Refutation
        • P(g);
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);OGATE,P_SPINP(g),S_FLIGHT,XP(F)::QAR1(B)
        • P(g);P_SPINP(g)::QAB(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);XP(b)
      • Vars
        • K(f);S_FLIGHT::B(D)
        • K(f);P_SPINP(g),S_FLIGHT,XP(F)::QAB(B),XP(e)
        • P(g);::P(E)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • P(E);
    • Vars
      • K(f);P-FLIGHT::QAR1(B)
      • K(f);P_SPINP(g),S_FLIGHT,XP(F)::S(J)
      • P(g);::QAB1(B)
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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).