MESON Chess Problem Database

Problem Display
PID: 223286 (8/8/3K1pR1/3p3N/1P2k3/2Qp4/5r2/5NB1 w - - 0 1)

Bristow, Henry

Newark Sunday Call, 1885

8/8/3K1pR1/3p3N/1P2k3/2Qp4/5r2/5NB1

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qxd3#
    • 1...Kf5
      • 2.Qxd3#
    • 1...Rf5
      • 2.Sd2#
    • 1...d2
      • 2.Sfg3#
  • Tries
    • 1.Shg3+?
      • 1...Kf4
        • 2.Qxf6#
      • 1...Kf3!
    • 1.Rg4+?
      • 1...Kf5
        • 2.Se3#
        • 2.Qc8#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Kf3!
    • 1.Rxf6?
      • threat
        • 2.Shg3#
        • 2.Qe5#
      • 1...Rf4
        • 2.Sd2#
        • 2.Rxf4#
      • 1...Rf5
        • 2.Sd2#
      • 1...Rg2
        • 2.Rf4#
        • 2.Qd4#
        • 2.Qe5#
      • 1...Rf3
        • 2.Sd2#
        • 2.Qd4#
        • 2.Qe5#
      • 1...d2
        • 2.Sfg3#
        • 2.Shg3#
        • 2.Qe3#
      • 1...d4
        • 2.Shg3#
        • 2.Qc6#
      • 1...Rxf6+!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Qe3#
        • 2.Qxd3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qxd3#
        • 2.Qg4#
      • 1...Kxd4!
    • 1.Qe5+?
      • 1...Kf3
        • 2.Rg3#
        • 2.Qe3#
      • 1...fxe5!
    • 1.Qc4+?
      • 1...Kf3
        • 2.Qxd3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qxd3#
        • 2.Qg4#
      • 1...d4
        • 2.Qd5#
      • 1...dxc4!
    • 1.Qc5?
      • threat
        • 2.Qxd5#
      • 1...Kf3
        • 2.Qe3#
      • 1...Rf5
        • 2.Sd2#
        • 2.Qe3#
      • 1...d4
        • 2.Qd5#
      • 1...Kf5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxd5#
      • 1...Kf3
        • 2.Qxd3#
      • 1...Kd4
        • 2.Rg4#
      • 1...Kf5
        • 2.Qxd3#
      • 1...Rf5
        • 2.Sd2#
      • 1...d4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P_SPINP(b),S_FLIGHT::QAR2(C),XP(b)
    • K(c);S_FLIGHT::QAB(C),XP(b)
    • R(a);N_GUARD,SBLOCK::S(A)
    • P(b);::S(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(C),XP(e)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R1(G),XR(a)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • R(G);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD::S(A)
      • Refutation
        • R(a);CHECK,XR(G)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(a),XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAB1(C)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XP(d)
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
        • P(d);::QAB1(C)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(d)
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAR2(C),XP(b)
      • K(c);P-FLIGHT,P_SPINR(a)::R(G)
      • K(c);S_FLIGHT::QAB(C),XP(b)
      • R(a);N_GUARD,SBLOCK::S(A)
      • P(d);::QAB1(C)
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).