MESON Chess Problem Database

Problem Display
PID: 269343 (3KB3/pp6/3R4/1Nkp1pQr/3R4/4p2p/N2n1P2/7n w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Mosiashvili-75 JT (Kudesnik), 2023

3KB3/pp6/3R4/1Nkp1pQr/3R4/4p2p/N2n1P2/7n

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.R4xd5#
    • 1...b6
      • 2.R6xd5#
  • Tries
    • 1.Qxe3?
      • threat
        • 2.Qa3#
      • 1...Sb3
        • 2.Qc3#
      • 1...Sc4
        • 2.R4xd5#
      • 1...Sb1!
    • 1.Qe7?
      • threat
        • 2.Ra6#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Qc7#
      • 1...Rh6
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rxh6#
        • 2.Qc7#
      • 1...Sc4
        • 2.R4xd5#
        • 2.Qc7#
      • 1...Se4
        • 2.Qc7#
      • 1...a6
        • 2.Rxa6#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Qc7#
      • 1...b6
        • 2.R6xd5#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Qc7#
      • 1...Rh7!
    • 1.Qxf5?
      • threat
        • 2.Qc8#
      • 1...Rh7
        • 2.Qxd5#
      • 1...Rxf5!
  • Keys
    • 1.Sa3!
      • threat
        • 2.R4xd5#
      • 1...Kxd4
        • 2.Qxe3#
      • 1...Kxd6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);SBLOCK::R1(C),XP(f)
    • P(j);SBLOCK::R1(F),XP(f)
  • Tries
    • Try
      • Q(E);XP(c)
      • Threat
        • QAB(E)
      • Vars
        • S(b);N_GUARD::QAR2(E)
        • S(b);SBLOCK::QAB(E)+R(C),DCHECK,XP(f)
      • Refutation
        • S(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(6)
      • Vars
        • S(b);::QAR2(E)
      • Refutation
        • R(h);
    • Try
      • Q(E);P_PINP(f),XP(g)
      • Threat
        • QAR(E)
      • Vars
        • R(h);N_GUARD::QAR1(E),XP(f)
      • Refutation
        • R(h);N_SPINP(f),XQ(E)
  • Actual
    • S(D);
    • Threat
      • R1(C),XP(f)
    • Vars
      • K(e);OGATEB,P_SPINP(f),S_FLIGHT,XR(C)::QAB1(E),XP(c)
      • K(e);OGATEB,P_SPINP(f),S_FLIGHT,XR(F)::QAB1(E)
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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).