MESON Chess Problem Database

Problem Display
PID: 4675 (1B6/5P2/B2pkpP1/Q7/7P/5K2/8/8 w - - 0 1)

Obermann, Johannes Hugo Wilhelm

International Chess Magazine, 1886

1B6/5P2/B2pkpP1/Q7/7P/5K2/8/8

#2

7 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1+?
      • 1...Kf5
        • 2.Bd3#
        • 2.Qe4#
      • 1...Kd7
        • 2.Qe8#
      • 1...Kd5!
    • 1.Qc5?
      • 1...Kd7
        • 2.Qxd6#
      • 1...Ke7
        • 2.Qxd6#
      • 1...f5
        • 2.Qxd6#
      • 1...d5
        • 2.Bc8#
      • 1...dxc5!
    • 1.Qd5+?
      • 1...Kd7
        • 2.Qxd6#
      • 1...Ke7
        • 2.Qxd6#
      • 1...Kxd5!
    • 1.f8Q?
      • threat
        • 2.Bc8#
        • 2.Qxd6#
        • 2.Qf7#
        • 2.Qe8#
      • 1...d5
        • 2.Bc8#
      • 1...f5
        • 2.Bc8#
        • 2.Qxd6#
        • 2.Qaxf5#
        • 2.Qf7#
      • 1...Kd7!
  • Keys
    • 1.Qb4!
      • 1...Kd5
        • 2.Qxd6#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd7
        • 2.Qxd6#
      • 1...Ke7
        • 2.Qxd6#
      • 1...d5
        • 2.Bc8#
      • 1...f5
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAR1(C),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(C),XP(a)
        • P(c);SBLOCK::QAR1(C),XP(a)
        • P(a);::B(D)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(C),XP(a)
        • K(b);P-FLIGHT::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • P(F);
      • Threat
        • DUALS(4)
      • Vars
        • P(a);::B(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::QAR1(C),XP(a)
      • K(b);P-FLIGHT,P_SPINP(a)::QAR1(C)
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);P-FLIGHT,P_SPINP(a)::QAB1(C),XP(a)
      • P(a);SBLOCK::B(D)
      • P(c);SBLOCK::QAR1(C),XP(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).