MESON Chess Problem Database

Problem Display
PID: 275966 (8/3PR2K/2rp4/1n2B1P1/1P2k1BR/1N1prp1P/Q2bp2N/5n2 w - - 0 1)

Langstaff, William A

Western Morning News, 1926

(First published on Sat Jun 12 1926)

8/3PR2K/2rp4/1n2B1P1/1P2k1BR/1N1prp1P/Q2bp2N/5n2

#2

12 + 10

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sc5#
    • 1...Sxh2
      • 2.Sxd2#
    • 1...Sg3
      • 2.Sxd2#
    • 1...dxe5
      • 2.Be6#
    • 1...d5
      • 2.Bd6#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Bxf3#
        • 2.Bf5#
        • 2.Bh5#
      • 1...Sxh2
        • 2.Bxf3#
        • 2.Bf5#
      • 1...Rc4
        • 2.Bxf3#
      • 1...e1Q
        • 2.Bxf3#
        • 2.Bf5#
      • 1...e1B
        • 2.Bxf3#
        • 2.Bf5#
      • 1...Be1
        • 2.Bxf3#
        • 2.Bf5#
      • 1...f2
        • 2.Bxe2#
        • 2.Bf3#
        • 2.Bf5#
        • 2.Bh5#
      • 1...Sxd4!
    • 1.Bf5+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kxf5!
    • 1.Bh5+?
      • 1...Kd5
        • 2.Sc5#
        • 2.Bf7#
      • 1...Kf5!
    • 1.Ba1+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
    • 1.Bb2+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
    • 1.Bc3+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
    • 1.Bf6+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
    • 1.Bg7+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
    • 1.Bh8+?
      • 1...Kd5
        • 2.Sc5#
      • 1...Kf4!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Bxf3#
      • 1...dxe5+
        • 2.Be6#
      • 1...d5+
        • 2.Bd6#
      • 1...Kd5
        • 2.Sc5#
      • 1...Sxh2
        • 2.Sxd2#
      • 1...f2
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(g);S_CUTP(j),S_CUTR(i),S_FLIGHT::QAB(A)+S(C)
    • S(a);N_GUARD,XS(B)::S(C),XB(b)
    • S(a);N_GUARD::S(C),XB(b)
    • P(j);P_SPINP(j),SBLOCK,XB(H)::R(G)+B(F)
    • P(j);SBLOCK::R(K)+B(H)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(i);::R(G)+B(F),DCHECK,XP(f)
      • Refutation
        • S(h);XS(C)
    • Try
      • B(F);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);S_FLIGHT,XB(F)
    • Try
      • B(F);CHECK
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(A)+S(C)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • K(L);S_FLIGHT
    • Threat
      • R(G)+B(F),DCHECK,XP(f)
    • Vars
      • P(j);CHECK,P_SPINP(j),SBLOCK,XB(H)::R(G)+B(F)
      • P(j);CHECK,SBLOCK::R(K)+B(H)
      • K(g);S_CUTP(j),S_CUTR(i),S_FLIGHT::QAB(A)+S(C)
      • S(a);N_GUARD,XS(B)::S(C),XB(b)
      • P(f);::R(G)+B(F),DCHECK
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