MESON Chess Problem Database

Problem Display
PID: 129739 (8/2p1K3/2N2p2/3k4/N3p3/8/3P4/5B1Q w - - 0 1)

Maximov, Nikolai J

Shakhmatnoe obozrenie, 1901

8/2p1K3/2N2p2/3k4/N3p3/8/3P4/5B1Q

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qxe4#
  • Tries
    • 1.Be2?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...f5!
    • 1.Bd3?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qxe4#
      • 1...f5!
    • 1.Bc4+?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Kxc4!
    • 1.Ba6?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...f5!
    • 1.Qg2?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...f5!
    • 1.Qg1?
      • threat
        • 2.Qc5#
      • 1...e3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kxc6!
    • 1.Qh4?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...e3
        • 2.Bg2#
        • 2.Qh1#
        • 2.Qc4#
      • 1...f5!
    • 1.Qh5+?
      • 1...Kxc6
        • 2.Qb5#
      • 1...f5!
    • 1.Qh6?
      • 1...e3
        • 2.Qh1#
      • 1...f5
        • 2.Qe6#
      • 1...Kxc6!
    • 1.Qh7?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...e3
        • 2.Qh1#
      • 1...f5!
    • 1.d4?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...f5!
  • Keys
    • 1.Qh8!
      • 1...Kxc6
        • 2.Qa8#
      • 1...e3
        • 2.Qh1#
      • 1...f5
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • B(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XB(A)
    • Try
      • B(A);
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(E)
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(E)::QAB1(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAB(B)
        • P(c);OGATE::QAB1(B)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT,XS(E)
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
        • P(a);OGATEB::QAB(B)
      • Refutation
        • P(c);
    • Try
      • P(C);
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(B),XP(a)
      • Refutation
        • P(c);
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB(B)
      • P(a);OGATEB::QAB(B)
      • P(c);::S(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).