MESON Chess Problem Database

Problem Display
PID: 214552 (8/2p4Q/2prnB2/P3n1N1/1pPk4/1P1P4/3K4/8 w - - 0 1)

Abraham, Victor

Cincinnati Commercial, 1879

8/2p4Q/2prnB2/P3n1N1/1pPk4/1P1P4/3K4/8

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sxe6#
    • 1...Rd7
      • 2.Sxe6#
    • 1...Rd8
      • 2.Sxe6#
    • 1...Sc5
      • 2.Sf3#
    • 1...c5
      • 2.Sf3#
      • 2.Qe4#
  • Tries
    • 1.Bxe5+?
      • 1...Kc5
        • 2.Se4#
      • 1...Kxe5!
    • 1.Qf5?
      • threat
        • 2.Qf2#
        • 2.Qxe5#
      • 1...Rd5
        • 2.Sxe6#
        • 2.Qf2#
      • 1...Sf4
        • 2.Qxe5#
      • 1...Kc5!
    • 1.Qh2?
      • threat
        • 2.Qg1#
        • 2.Qxe5#
        • 2.Qf2#
      • 1...Rd5
        • 2.Sxe6#
        • 2.Qg1#
        • 2.Qf2#
      • 1...Sf4
        • 2.Qg1#
        • 2.Qf2#
      • 1...Kc5!
    • 1.Qh4+?
      • 1...Sf4
        • 2.Qf2#
      • 1...Kc5!
  • Keys
    • 1.Qe7!
      • 1...Kc5
        • 2.Sxe6#
      • 1...Sxg5
        • 2.Qxe5#
      • 1...Rd5
        • 2.Sf3#
        • 2.Sxe6#
      • 1...Rd7
        • 2.Sf3#
        • 2.Sxe6#
      • 1...Rd8
        • 2.Sf3#
        • 2.Sxe6#
      • 1...Sf4
        • 2.Qxe5#
      • 1...Sc5
        • 2.Sf3#
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Sg7
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qxe5#
      • 1...c5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::S(F),XS(f)
    • S(f);SBLOCK::S(F)
  • Tries
    • Try
      • B(G);CHECK,XS(c)
      • Vars
        • K(b);P_PINP(C),S_FLIGHT::S(F)
      • Refutation
        • K(b);P_PINP(C),S_FLIGHT,XB(G)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB1(H),XS(c)
      • Refutation
        • K(b);P_PINP(C),S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);N_SPINS(c),P_PINP(C),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • S(f);N_SPINS(c),P_SPINS(f)::QAB(H)
      • Refutation
        • K(b);N_SPINS(c),P_PINP(C),S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(b);N_SPINS(c),P_PINP(C),P_SPINR(e),S_FLIGHT::S(F),XS(f)
      • S(f);OGATE,XS(F)::QAB1(H),XS(c)
      • S(f);OGATE::QAB1(H),XS(c)
      • P(d);SBLOCK::S(F)
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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).