MESON Chess Problem Database

Problem Display
PID: 275597 (8/4p3/4B3/2Pp3N/3pk2p/4p2P/p3Q1p1/B5Kb w - - 0 1)

Boswell, Edward

Stephens, Walter

Western Morning News, 1926

(First published on Sat Mar 27 1926)

8/4p3/4B3/2Pp3N/3pk2p/4p2P/p3Q1p1/B5Kb

#2

7 + 9

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxe3#
    • 1...d3
      • 2.Qg4#
  • Tries
    • 1.Qd1?
      • 1...e2
        • 2.Qxe2#
      • 1...d3
        • 2.Qg4#
      • 1...Ke5!
    • 1.Qd3+?
      • 1...Kf3
        • 2.Bg4#
        • 2.Bxd5#
      • 1...Ke5
        • 2.Qf5#
        • 2.Qxe3#
      • 1...Kxd3!
    • 1.Qc4?
      • 1...Kf3
        • 2.Bxd5#
      • 1...Ke5
        • 2.Qxd5#
      • 1...e2
        • 2.Qxe2#
      • 1...dxc4!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Bxd4#
        • 2.Qf5#
      • 1...Kd3!
    • 1.Qc2+?
      • 1...Kf3
        • 2.Bg4#
        • 2.Bxd5#
      • 1...Ke5
        • 2.Qf5#
      • 1...d3!
    • 1.c6?
      • 1...d3
        • 2.Qg4#
      • 1...Ke5!
  • Keys
    • 1.Qxa2!
      • 1...Kd3
        • 2.Bf5#
      • 1...Kf3
        • 2.Bxd5#
      • 1...Ke5
        • 2.Qxd5#
      • 1...e2
        • 2.Qxe2#
      • 1...d3
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);N_GUARD,P-FLIGHT,S_CUTP(e)::QAR2(C),XP(d)
    • P(e);SBLOCK::QAR2(C)
  • Tries
    • Try
      • Q(C);N_PINP(d)
      • Vars
        • P(d);OGATEB::QAR2(C),XP(d)
        • P(e);SBLOCK::QAR2(C)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(e)
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Refutation
        • K(f);S_FLIGHT,XQ(C)
    • Try
      • Q(C);N_PINP(d),P_PINP(e)
      • Vars
        • K(f);N_GUARD,N_SPINP(e),S_FLIGHT::B(G),XP(h)
        • K(f);N_GUARD,P-FLIGHT::QAR1(C),XP(h)
        • P(d);OGATEB::QAR2(C),XP(d)
      • Refutation
        • P(h);N_SPINP(e),XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Vars
        • K(f);OGATE,P-FLIGHT,P_SPINP(e)::QAR1(C)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • P(E);
      • Vars
        • P(e);SBLOCK::QAR2(C)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • Q(C);N_PINP(d),XP(b)
    • Vars
      • K(f);N_GUARD,S_FLIGHT::B(G)
      • K(f);N_GUARD,S_FLIGHT::B(G),XP(h)
      • K(f);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(C),XP(h)
      • P(d);OGATEB::QAR2(C),XP(d)
      • P(e);::QAB1(C),XP(h)
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