MESON Chess Problem Database

Problem Display
PID: 150621 (8/N6B/QB3Kn1/2pk4/3p4/8/6P1/3R4 w - - 0 1)

Andrew, Frederick William

Hampstead and Highgate Express, 1896

(First published on Sat Apr 4 1896)

8/N6B/QB3Kn1/2pk4/3p4/8/6P1/3R4

#2

7 + 4

14867 BCPS Library 2014
15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxd3#
    • 1...c4
      • 2.Rxd4#
  • Tries
    • 1.Bxg6?
      • 1...d3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...c4
        • 2.Rxd4#
      • 1...Kd6!
    • 1.Qb5?
      • 1...Kd6
        • 2.Qc6#
      • 1...d3
        • 2.Qxd3#
      • 1...Sf4
        • 2.Qxc5#
      • 1...Sh4
        • 2.Qxc5#
      • 1...Se5
        • 2.Qxc5#
      • 1...Se7
        • 2.Qxc5#
      • 1...Sf8
        • 2.Qxc5#
      • 1...Sh8
        • 2.Qxc5#
      • 1...Ke4!
    • 1.Qb7+?
      • 1...Kd6
        • 2.Sb5#
        • 2.Sc8#
        • 2.Qc6#
      • 1...Kc4!
    • 1.Qa2+?
      • 1...Kd6
        • 2.Qe6#
      • 1...c4
        • 2.Rxd4#
      • 1...Ke4!
  • Keys
    • 1.Qa3!
      • 1...Kc4
        • 2.Bg8#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kd6
        • 2.Rxd4#
      • 1...d3
        • 2.Qxd3#
      • 1...Sf4
        • 2.Qxc5#
      • 1...Sh4
        • 2.Qxc5#
      • 1...Se5
        • 2.Qxc5#
      • 1...Se7
        • 2.Qxc5#
      • 1...Sf8
        • 2.Qxc5#
      • 1...Sh8
        • 2.Qxc5#
      • 1...c4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(C),XP(a)
    • P(b);N_GUARD::R1(A),XP(a)
  • Tries
    • Try
      • B(G);XS(d)
      • Vars
        • P(b);N_GUARD::R1(A),XP(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • P(a);OGATEB::QAR2(C),XP(a)
        • S(d);::QAR1(C),XP(b)
      • Refutation
        • K(c);N_SPINP(a),P_SPINS(d),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(C)
        • P(b);N_SPINP(a),P_SPINP(b)::R1(A),XP(a)
      • Refutation
        • K(c);N_SPINP(a),P_SPINS(d),S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(c);N_SPINP(a),S_FLIGHT::B(G)
      • K(c);N_SPINP(a),P_SPINS(d),S_FLIGHT::QAB1(C)
      • K(c);P-FLIGHT::R(A),XP(a)
      • P(a);OGATEB::QAR2(C),XP(a)
      • S(d);::QAR1(C),XP(b)
      • P(b);N_GUARD::R1(A),XP(a)
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