MESON Chess Problem Database

Problem Display
PID: 160193 (8/8/R2P4/1ppk4/1PNpp3/7B/K3Q3/B7 w - - 0 1)

Russ, Colin Albert Harry

British Chess Magazine, 2004

8/8/R2P4/1ppk4/1PNpp3/7B/K3Q3/B7

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Se3#
    • 1...bxc4
      • 2.Qh5#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qh5#
      • 1...e3
        • 2.Qf3#
        • 2.Qg2#
      • 1...bxc4+!
    • 1.Sd2?
      • threat
        • 2.Qh5#
        • 2.Qxe4#
      • 1...cxb4
        • 2.Qxb5#
        • 2.Qh5#
      • 1...e3
        • 2.Qh5#
      • 1...Ke5!
    • 1.Qd1?
      • 1...Kxc4
        • 2.Qb3#
      • 1...bxc4
        • 2.Qh5#
      • 1...cxb4
        • 2.Qxd4#
      • 1...d3
        • 2.Se3#
      • 1...e3!
    • 1.Qd2?
      • 1...Kxc4
        • 2.Be6#
      • 1...bxc4
        • 2.Qg5#
      • 1...cxb4
        • 2.Qxd4#
      • 1...d3
        • 2.Se3#
      • 1...e3!
    • 1.d7?
      • threat
        • 2.Be6#
        • 2.Rd6#
        • 2.d8Q#
        • 2.d8R#
      • 1...bxc4
        • 2.Qh5#
      • 1...d3
        • 2.Se3#
        • 2.Be6#
      • 1...e3
        • 2.Bg2#
      • 1...cxb4!
  • Keys
    • 1.Qe3!
      • 1...Kxc4
        • 2.Qb3#
      • 1...dxe3
        • 2.Sxe3#
      • 1...bxc4
        • 2.Qg5#
      • 1...cxb4
        • 2.Qxd4#
      • 1...d3
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::S(F)
    • P(c);SBLOCK,XS(F)::QAR(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAR(C)
      • Refutation
        • P(c);CHECK,XS(F)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR(C)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(C);P_PINP(a)
      • Vars
        • K(e);N_SPINP(a),OGATEB,S_FLIGHT,XS(F)::QAB1(C)
        • P(c);SBLOCK,XS(F)::QAR(C)
        • P(d);N_GUARD,XP(E)::QAR1(C),XP(a)
        • P(a);::S(F)
      • Refutation
        • P(b);
    • Try
      • Q(C);P_PINP(a)
      • Vars
        • K(e);N_SPINP(a),S_FLIGHT,XS(F)::B(D)
        • P(c);SBLOCK,XS(F)::QAR(C)
        • P(d);N_GUARD,XP(E)::QAR1(C),XP(a)
        • P(a);::S(F)
      • Refutation
        • P(b);
    • Try
      • P(H);
      • Threat
        • DUALS(4)
      • Vars
        • P(c);SBLOCK,XS(F)::QAR(C)
        • P(b);OGATEB::B(D)
      • Refutation
        • P(d);XP(E)
  • Actual
    • Q(C);
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB1(C)
      • P(a);XQ(C)::S(F),XP(a)
      • P(c);SBLOCK,XS(F)::QAR(C)
      • P(d);N_GUARD,XP(E)::QAR1(C),XP(a)
      • P(a);OGATE::QAR1(C),XP(d)
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