MESON Chess Problem Database

Problem Display
PID: 229262 (1n6/1Q6/2r5/3k4/2NN4/3K4/8/8 w - - 0 1)

Nagy, Odon

Onitiu, Valerian

Magyar Sakkvilag, 1926

1n6/1Q6/2r5/3k4/2NN4/3K4/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb5#
    • 1...Sa6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qxc6#
  • Tries
    • 1.Kc3?
      • 1...Kc5
        • 2.Qb5#
      • 1...Sa6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxc6#
      • 1...Ke4!
    • 1.Ke3?
      • 1...Kc5
        • 2.Qb5#
      • 1...Sa6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxc6#
      • 1...Kxc4!
  • Keys
    • 1.Qa8!
      • 1...Kc5
        • 2.Qa5#
      • 1...Sa6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINR(b),P-FLIGHT::QAR1(D)
    • S(c);N_GUARD::QAB1(D),XR(b)
  • Tries
    • Try
      • K(A);P-FLIGHT,P_SPINS(B)
      • Vars
        • K(a);N_PINS(B),N_SPINR(b),P-FLIGHT::QAR1(D)
        • S(c);N_GUARD::QAB1(D),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::QAR1(D)
        • S(c);N_GUARD::QAB1(D),XR(b)
      • Refutation
        • K(a);N_SPINR(b),S_FLIGHT,XS(B)
  • Actual
    • Q(D);
    • Vars
      • K(a);N_SPINR(b),P-FLIGHT::QAR2(D)
      • S(c);N_GUARD::QAB1(D),XR(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).