MESON Chess Problem Database

Problem Display
PID: 16152 (8/2p1K3/4N3/3kp3/8/8/8/4QB2 w - - 0 1)

Bantysh, Nikolai Ivanovich

StrateGems, 2000

8/2p1K3/4N3/3kp3/8/8/8/4QB2

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Bg2+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kc4!
    • 1.Bd3?
      • threat
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Kc6!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qc3?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd3#
      • 1...e4
        • 2.Sf4#
        • 2.Sxc7#
        • 2.Qc5#
      • 1...c5!
    • 1.Qa5+?
      • 1...Kc6
        • 2.Sd8#
        • 2.Qb5#
      • 1...c5
        • 2.Qa8#
      • 1...Ke4!
    • 1.Qb1?
      • 1...Kc6
        • 2.Qb5#
      • 1...c5
        • 2.Qb7#
      • 1...c6
        • 2.Qd3#
      • 1...e4!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qxe5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qc4#
      • 1...Kc6
        • 2.Qb5#
      • 1...e4
        • 2.Qc5#
      • 1...c5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(c);N_GUARD::QAB(A)
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR1(A)
      • P(c);N_GUARD::QAB(A)
HTML5 logo

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).