MESON Chess Problem Database

Problem Display
PID: 133951 (N1b1B3/1p1np3/1B2K3/Pkp5/p2p4/R2P4/1n1Q2P1/bR6 w - - 0 1)

Driver, John Edward

The Field, 1963

(First published on Thu Jan 17 1963)

N1b1B3/1p1np3/1B2K3/Pkp5/p2p4/R2P4/1n1Q2P1/bR6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Sc7#
  • Tries
    • 1.Kd5?
      • threat
        • 2.Sc7#
      • 1...Ka6
        • 2.Sc7#
      • 1...e6+!
    • 1.Bxd7+?
      • 1...Ka6
        • 2.Sc7#
      • 1...Bxd7+!
    • 1.Qc1?
      • 1...Ka6
        • 2.Sc7#
      • 1...Kc6
        • 2.Qxc5#
      • 1...c4
        • 2.Qxc4#
      • 1...Kb4!
    • 1.Qc3?
      • 1...Ka6
        • 2.Sc7#
      • 1...Kc6
        • 2.Qxc5#
      • 1...c4
        • 2.Qxc4#
      • 1...dxc3!
    • 1.Qg5?
      • 1...Ka6
        • 2.Sc7#
      • 1...Kc6
        • 2.Qxc5#
      • 1...Kb4!
    • 1.Qxb2+?
      • 1...Ka6
        • 2.Sc7#
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Bxb2!
  • Keys
    • 1.Qc2!
      • 1...Kb4
        • 2.Qxa4#
      • 1...Ka6
        • 2.Sc7#
      • 1...Kc6
        • 2.Qxc5#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINS(b),S_FLIGHT::S(I)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • S(I)
      • Vars
        • K(e);N_SPINS(b),S_FLIGHT::S(I)
      • Refutation
        • P(i);CHECK
    • Try
      • B(J);CHECK,P_SPINB(J),XS(h)
      • Vars
        • K(e);N_SPINS(b),S_FLIGHT::S(I)
      • Refutation
        • B(j);CHECK,XB(J)
    • Try
      • Q(B);
      • Vars
        • K(e);N_SPINS(b),S_FLIGHT::S(I)
        • K(e);N_SPINS(b),P_SPINP(f),P_SPINS(h),S_FLIGHT::QAR1(B),XP(f)
        • P(f);::QAB1(B),XP(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(e);N_SPINS(b),S_FLIGHT::S(I)
        • K(e);N_SPINS(b),P_SPINP(f),P_SPINS(h),S_FLIGHT::QAR1(B),XP(f)
        • P(f);::QAB1(B),XP(f)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);P_PINP(f)
      • Vars
        • K(e);N_SPINP(f),N_SPINS(b),S_FLIGHT::S(I)
        • K(e);N_SPINP(f),N_SPINS(b),P_SPINS(h),S_FLIGHT::QAR1(B),XP(f)
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT
    • Try
      • Q(B);CHECK,P_PINS(h),XS(b)
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • B(a);P_SPINB(a),XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(e);P-FLIGHT::QAR1(B),XP(c)
      • K(e);N_SPINS(b),S_FLIGHT::S(I)
      • K(e);N_SPINS(b),P_SPINP(f),P_SPINS(h),S_FLIGHT::QAR1(B),XP(f)
      • P(f);::QAB1(B),XP(f)
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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).