MESON Chess Problem Database

Problem Display
PID: 2599 (Q2K4/8/3p4/3N1p2/3knN2/3B2nR/R4P1B/8 w - - 0 1)

Perry, William E

Source?, 0000

Q2K4/8/3p4/3N1p2/3knN2/3B2nR/R4P1B/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Se6#
    • 1...Sf1
      • 2.Se6#
    • 1...Sh1
      • 2.Se6#
    • 1...Se2
      • 2.Se6#
    • 1...Sh5
      • 2.Se6#
  • Tries
    • 1.Se6+?
      • 1...Kxd3
        • 2.Qa6#
      • 1...Ke5!
    • 1.Ra4+?
      • 1...Kc5
        • 2.Se6#
        • 2.Qc8#
      • 1...Ke5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Ke5!
    • 1.Qa5?
      • 1...Sxf2
        • 2.Qc3#
      • 1...Sf1
        • 2.Se2#
        • 2.Se6#
      • 1...Sh1
        • 2.Se2#
        • 2.Se6#
      • 1...Se2
        • 2.Sxe2#
        • 2.Se6#
      • 1...Sh5
        • 2.Se2#
        • 2.Se6#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Sg5
        • 2.Qc3#
      • 1...Sf6
        • 2.Qc3#
      • 1...Ke5!
    • 1.Qa7+?
      • 1...Sc5
        • 2.Qg7#
      • 1...Ke5!
  • Keys
    • 1.Re2!
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Qa1#
      • 1...Sxe2
        • 2.Se6#
      • 1...Sxf2
        • 2.Qa7#
      • 1...Sf1
        • 2.Se6#
      • 1...Sh1
        • 2.Se6#
      • 1...Sh5
        • 2.Se6#
      • 1...Sd2
        • 2.Qa7#
      • 1...Sc3
        • 2.Qa7#
      • 1...Sc5
        • 2.Qa1#
      • 1...Sg5
        • 2.Qa7#
      • 1...Sf6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(F)
    • S(a);::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a),XB(D)::QAB(H)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • R(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • S(c);N_GUARD,XP(B)::QAB1(H)
        • S(c);N_GUARD::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c),SBLOCK::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);P_SPINS(c),S_FLIGHT::QAB(H)
      • S(a);XR(A)::S(F)
      • S(c);N_GUARD,XP(B)::QAB(H)
      • S(a);::S(F)
      • S(c);N_GUARD::QAB(H)
      • S(c);N_GUARD,SBLOCK::QAB(H)
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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).