MESON Chess Problem Database

Problem Display
PID: 268542 (K4n2/B2R2r1/3N1r2/R1NkPp2/Q4Pn1/p2B4/qb3p2/7b w - - 0 1)

Daniel, Arthur William

1st Prize, Sunday Referee, 1929

(First published on Sun Oct 20 1929)

K4n2/B2R2r1/3N1r2/R1NkPp2/Q4Pn1/p2B4/qb3p2/7b

#2

10 + 11

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Rxd6#
    • 1...Re6
      • 2.Sb3#
      • 2.Sce4#
      • 2.Sa6#
      • 2.Scb7#
    • 1...Se6
      • 2.Sf7#
  • Tries
    • 1.Sb5+?
      • 1...Kc6
        • 2.Sxa3#
        • 2.Sc3#
        • 2.Sd4#
        • 2.Sc7#
        • 2.Ra6#
      • 1...Rd6
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Sxd7
        • 2.Sc7#
      • 1...Rxd7!
    • 1.Sf7+?
      • 1...Rd6
        • 2.Rxd6#
      • 1...Sxd7!
    • 1.Se8+?
      • 1...Rd6
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Sxd7
        • 2.Sc7#
      • 1...Rxd7!
    • 1.Bc4+?
      • 1...Kd4+
        • 2.Sce4#
      • 1...Qxc4!
    • 1.Bb5?
      • threat
        • 2.Bc6#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Sxe5!
    • 1.Qb3+?
      • 1...Kd4+
        • 2.Sce4#
        • 2.Scb7#
      • 1...Kc6
        • 2.Bb5#
        • 2.Ra6#
        • 2.Qb7#
      • 1...Qxb3!
    • 1.Qc4+?
      • 1...Kc6
        • 2.Ra6#
      • 1...Qxc4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Be4#
      • 1...Kd4+
        • 2.Sce4#
      • 1...Kc6
        • 2.Bb5#
      • 1...Rxd6
        • 2.Rxd6#
      • 1...Be4
        • 2.Bxe4#
      • 1...Bd4
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(i);OGATE,P_SPINR(i),XS(G)::R1(I),XR(i)
    • S(k);N_GUARD,S_CUTR(i)::R(I)+S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(k);XR(I)::S(G)
      • Refutation
        • R(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R1(I),XR(i)
      • Refutation
        • S(k);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • S(k);XR(I)::S(G)
      • Refutation
        • R(j);XR(I)
    • Try
      • B(A);CHECK
      • Vars
        • K(g);CHECK,P-FLIGHT::B(H)+S(E)
      • Refutation
        • Q(b);XB(A)
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • Q(b);N_GUARD::QAB1(B),XQ(b)
      • Refutation
        • S(f);XP(F)
    • Try
      • Q(B);CHECK
      • Refutation
        • Q(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);S_CUTQ(b),S_FLIGHT::R(D)
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+B(A),DCHECK
    • Vars
      • K(g);CHECK,N_GUARD,P-FLIGHT::B(H)+S(E)
      • K(g);S_CUTB(c),S_FLIGHT::B(A)
      • R(i);OGATE,P_SPINR(i),XS(G)::R1(I),XR(i)
      • B(a);::QAR(B)+B(A),DCHECK,XB(a)
      • B(c);SBLOCK::QAB(B),XB(a)
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