MESON Chess Problem Database

Problem Display
PID: 271244 (6B1/1p5p/1p2Ppp1/4kqnR/1Q1NrN2/K4P1n/3P2P1/B3R1b1 w - - 0 1)

Smith, James Alfred John

Sunday Referee, 1932

(First published on Sun Nov 20 1932)

6B1/1p5p/1p2Ppp1/4kqnR/1Q1NrN2/K4P1n/3P2P1/B3R1b1

#2

12 + 11

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Se2#
    • 1...Qg4
      • 2.Rxe4#
    • 1...Qxe6
      • 2.Rxe4#
    • 1...Rxe1
      • 2.Sc6#
    • 1...Re2
      • 2.Sc6#
    • 1...Re3+
      • 2.Sb3#
    • 1...Sxe6
      • 2.Rxe4#
    • 1...Sf7
      • 2.Rxe4#
  • Tries
    • 1.Sb5+?
      • 1...Bd4
        • 2.Qd6#
      • 1...Kxf4!
  • Keys
    • 1.e7!
      • threat
        • 2.Sd3#
      • 1...Re3+
        • 2.Sb3#
      • 1...Kxf4
        • 2.Se2#
      • 1...Qxf4
        • 2.e8Q#
        • 2.e8R#
      • 1...Rxe1
        • 2.Sc6#
      • 1...Sxf4
        • 2.Sc6#
      • 1...Qe6
        • 2.Rxe4#
      • 1...Re2
        • 2.Sc6#
      • 1...Sf2
        • 2.Sde6#
      • 1...Se6
        • 2.Rxe4#
      • 1...Sf7
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINR(c),S_CUTB(a),S_CUTR(c),S_FLIGHT,XS(I)::S(H)
    • Q(e);N_GUARD,P_SPINS(f)::R1(B),XR(c)
    • Q(e);N_GUARD,P_SPINS(f),XP(K)::R1(B),XR(c)
    • R(c);N_SPINR(c),XR(B)::B(A)+S(H),DCHECK
    • R(c);::B(A)+S(H),DCHECK
    • R(c);CHECK,S_CUTB(a)::B(A)+S(H)
    • S(f);N_GUARD,P_SPINQ(e),XP(K)::R1(B),XR(c)
    • S(f);N_GUARD,P_SPINQ(e)::R1(B),XR(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB1(G)
      • Refutation
        • K(d);S_FLIGHT,XS(I)
  • Actual
    • P(K);
    • Threat
      • S(I)
    • Vars
      • R(c);CHECK,S_CUTB(a)::B(A)+S(H)
      • K(d);N_SPINR(c),S_CUTB(a),S_CUTR(c),S_FLIGHT,XS(I)::S(H)
      • Q(e);N_GUARD,P_SPINS(f),SBLOCK,XS(I)::P=Q
      • R(c);N_SPINR(c),XR(B)::B(A)+S(H),DCHECK
      • S(b);SBLOCK,XS(I)::B(A)+S(H),DCHECK
      • Q(e);N_GUARD,P_SPINS(f)::R1(B),XR(c)
      • R(c);::B(A)+S(H),DCHECK
      • S(b);S_CUTB(a)::B(A)+S(H)
      • S(f);N_GUARD,P_SPINQ(e)::R1(B),XR(c)
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