MESON Chess Problem Database

Problem Display
PID: 230129 (nR5B/2pNQ3/p1P5/kB1p4/P2p4/1b6/1P2p3/1Rn3K1 w - - 0 1)

Lawton, Howard

Southend Times, 1937

(First published on Sat Oct 30 1937)

nR5B/2pNQ3/p1P5/kB1p4/P2p4/1b6/1P2p3/1Rn3K1

#2

10 + 9

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.b4#
    • 1...Ba2
      • 2.b4#
    • 1...Bc2
      • 2.b4#
    • 1...Bxa4
      • 2.b4#
    • 1...Bc4
      • 2.b4#
    • 1...e1Q+
      • 2.Qxe1#
    • 1...e1S
      • 2.Qxe1#
    • 1...e1B
      • 2.Qxe1#
    • 1...e1R+
      • 2.Qxe1#
    • 1...d3
      • 2.Bc3#
    • 1...axb5
      • 2.Rxa8#
  • Tries
    • 1.Rxc1?
      • 1...e1Q+
        • 2.Qxe1#
      • 1...e1R+
        • 2.Qxe1#
      • 1...Bxa4
        • 2.b4#
      • 1...axb5
        • 2.Rxa8#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...Bd1
        • 2.b4#
      • 1...Ba2
        • 2.b4#
      • 1...Bc2
        • 2.b4#
      • 1...Bc4
        • 2.b4#
      • 1...d3
        • 2.Bc3#
      • 1...Sb6!
    • 1.Rxa8?
      • threat
        • 2.Rxa6#
      • 1...e1Q+
        • 2.Qxe1#
      • 1...e1R+
        • 2.Qxe1#
      • 1...Bxa4!
  • Keys
    • 1.Sc5!
      • 1...e1Q+
        • 2.Qxe1#
      • 1...e1R+
        • 2.Qxe1#
      • 1...Kb4
        • 2.Sb7#
      • 1...Bxa4
        • 2.b4#
      • 1...axb5
        • 2.Rxb5#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...Sa2
        • 2.Sxb3#
      • 1...Bd1
        • 2.b4#
      • 1...Ba2
        • 2.b4#
      • 1...Bc2
        • 2.b4#
      • 1...Bc4
        • 2.b4#
      • 1...Sd3
        • 2.Sxb3#
      • 1...Sb6
        • 2.Sb7#
      • 1...d3
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE::P(C)
    • B(c);OGATE,XP(D)::P(C)
    • P(b);CHECK,OGATE::QAB(H),XQ(b)
    • P(b);OGATE::QAB(H),XS(b)
    • P(b);OGATE::QAB(H),XB(b)
    • P(b);CHECK,OGATE::QAB(H),XR(b)
    • P(d);OGATE::B(J)
    • P(g);OGATEB,XB(E)::R(I),XS(i)
  • Tries
    • Try
      • R(A);XS(a)
      • Vars
        • P(b);CHECK,OGATE::QAB(H),XQ(b)
        • P(b);CHECK,OGATE::QAB(H),XR(b)
        • B(c);OGATE,XP(D)::P(C)
        • P(g);OGATEB,XB(E)::R(I),XS(i)
        • P(b);OGATE::QAB(H),XS(b)
        • P(b);OGATE::QAB(H),XB(b)
        • B(c);OGATE::P(C)
        • P(d);OGATE::B(J)
      • Refutation
        • S(i);
    • Try
      • R(I);P_PINP(g),XS(i)
      • Threat
        • R1(I),XP(g)
      • Vars
        • P(b);CHECK,OGATE::QAB(H),XQ(b)
        • P(b);CHECK,OGATE::QAB(H),XR(b)
      • Refutation
        • B(c);XP(D)
  • Actual
    • S(G);
    • Vars
      • P(b);CHECK,OGATE::QAB(H),XQ(b)
      • P(b);CHECK,OGATE::QAB(H),XR(b)
      • K(e);S_FLIGHT::QAB(H)+S(G)
      • B(c);OGATE,XP(D)::P(C)
      • P(g);OGATE,XB(E)::R1(I),XP(g)
      • P(b);OGATE::QAB(H),XS(b)
      • P(b);OGATE::QAB(H),XB(b)
      • S(a);N_GUARD::S(G),XB(c)
      • B(c);OGATE::P(C)
      • S(i);SBLOCK::S(G)
      • P(d);OGATE::B(J)
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