MESON Chess Problem Database

Problem Display
PID: 275281 (1q3b2/B1p3p1/r7/p5R1/2k3B1/2N3Rp/PpNPPn1K/8 w - - 0 1)

Howard, Kenneth Samuel

British Chess Magazine, 1935

1q3b2/B1p3p1/r7/p5R1/2k3B1/2N3Rp/PpNPPn1K/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Se3#
    • 1...Rd6
      • 2.Rc5#
    • 1...Re6
      • 2.Bxe6#
    • 1...Rxa7
      • 2.Be6#
    • 1...Bb4
      • 2.Se3#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Bd6
      • 2.Be6#
    • 1...Sd3
      • 2.exd3#
    • 1...Sxg4+
      • 2.R3xg4#
      • 2.R5xg4#
    • 1...c6
      • 2.Be6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rc3#
      • 1...Sxg4+
        • 2.R3xg4#
      • 1...Bc5
        • 2.Rxc5#
      • 1...c5
        • 2.Sba3#
      • 1...Bb4
        • 2.Se3#
      • 1...Bd6
        • 2.Be6#
      • 1...Sd1
        • 2.d3#
      • 1...Sd3
        • 2.exd3#
      • 1...Se4
        • 2.d3#
      • 1...c6
        • 2.Be6#
      • 1...b1S!
    • 1.Bc5?
      • threat
        • 2.Sa3#
        • 2.Se3#
      • 1...Sxg4+
        • 2.R3xg4#
      • 1...b1S
        • 2.Se3#
      • 1...Qb3
        • 2.Se3#
      • 1...Qb4
        • 2.Se3#
      • 1...Qe8
        • 2.Sa3#
      • 1...Re6
        • 2.Sa3#
        • 2.Bxe6#
      • 1...Sd1
        • 2.Sa3#
      • 1...Bxc5!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Rc3#
      • 1...Sxg4+
        • 2.R3xg4#
      • 1...Bc5
        • 2.Rxc5#
      • 1...c5
        • 2.Sba3#
      • 1...Qb3
        • 2.axb3#
      • 1...Qb4
        • 2.Se3#
      • 1...Bb4
        • 2.Se3#
      • 1...Bd6
        • 2.Be6#
      • 1...Sd1
        • 2.d3#
      • 1...Sd3
        • 2.exd3#
      • 1...Se4
        • 2.d3#
      • 1...c6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(i);SBLOCK::S(B)
    • R(f);S_CUTB(j)::R1(I)
    • R(f);N_GUARD::B(H),XR(f)
    • R(f);N_GUARD,XB(J)::B(H)
    • B(j);SBLOCK::S(B)
    • B(j);N_GUARD::R1(I),XB(j)
    • B(j);P_PINR(G),S_CUTR(f)::B(H)
    • S(b);OGATE::P(D),XS(b)
    • P(g);P_PINR(G),S_CUTR(f)::B(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(G)
      • Vars
        • S(b);CHECK,OGATE,XB(H)::R(G),XS(b)
        • B(j);N_GUARD::R1(I),XB(j)
        • P(g);P_PINR(G),S_CUTB(j)::S(F)
        • B(j);SBLOCK::S(B)
        • B(j);P_PINR(G),S_CUTR(f)::B(H)
        • S(b);N_GUARD::P(C)
        • S(b);OGATE::P(D),XS(b)
        • P(g);P_PINR(G),S_CUTR(f)::B(H)
      • Refutation
        • P(a);
    • Try
      • B(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,OGATE,XB(H)::R(G),XS(b)
        • P(a);::S(B)
        • Q(i);::S(B)
        • S(b);::S(B)
      • Refutation
        • B(j);XB(J)
  • Actual
    • S(F);
    • Threat
      • R1(G)
    • Vars
      • S(b);CHECK,OGATE,XB(H)::R(G),XS(b)
      • B(j);N_GUARD::R1(I),XB(j)
      • P(g);P_PINR(G),S_CUTB(j)::S(F)
      • Q(i);OGATE::P(A),XQ(i)
      • Q(i);SBLOCK::S(B)
      • B(j);SBLOCK::S(B)
      • B(j);P_PINR(G),S_CUTR(f)::B(H)
      • S(b);N_GUARD::P(C)
      • S(b);OGATE::P(D),XS(b)
      • P(g);P_PINR(G),S_CUTR(f)::B(H)
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