MESON Chess Problem Database

Problem Display
PID: 265111 (5R2/n2Kp3/4B1p1/N3k3/3pp3/6p1/3n2Qb/8 w - - 0 1)

Lawton, Howard

Sunday Referee, 1936

(First published on Sun Oct 11 1936)

5R2/n2Kp3/4B1p1/N3k3/3pp3/6p1/3n2Qb/8

#2

5 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxg3#
    • 1...Sb1
      • 2.Sc4#
    • 1...Sf1
      • 2.Sc4#
    • 1...Sb3
      • 2.Sc4#
    • 1...Sf3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...e3
      • 2.Qd5#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Rf7?
      • 1...Sb1
        • 2.Sc4#
      • 1...Bg1
        • 2.Qxg3#
      • 1...Sf1
        • 2.Sc4#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sf3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sb5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...e3
        • 2.Qd5#
      • 1...g5
        • 2.Rf5#
      • 1...d3!
    • 1.Qf1?
      • threat
        • 2.Qf4#
      • 1...Sxf1
        • 2.Sc4#
      • 1...d3
        • 2.Qa1#
      • 1...Sf3
        • 2.Sc4#
      • 1...g5
        • 2.Rf5#
        • 2.Qf5#
      • 1...g2!
    • 1.Qxe4+?
      • 1...Sxe4
        • 2.Sc4#
      • 1...Kxe4!
    • 1.Qxd2?
      • threat
        • 2.Sc4#
        • 2.Qf4#
        • 2.Qg5#
      • 1...d3
        • 2.Qc3#
        • 2.Qb2#
      • 1...g2
        • 2.Sc4#
        • 2.Qg5#
      • 1...g5
        • 2.Sc4#
        • 2.Rf5#
        • 2.Qxg5#
      • 1...e3!
  • Keys
    • 1.Qh1!
      • 1...d3
        • 2.Qa1#
      • 1...Sb1
        • 2.Sc4#
      • 1...Bg1
        • 2.Qh8#
      • 1...Sf1
        • 2.Sc4#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sf3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sb5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...g2
        • 2.Qxh2#
      • 1...e3
        • 2.Qd5#
      • 1...g5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAB(A),XP(c)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(h);N_GUARD::S(B)
    • S(h);N_GUARD::S(B),XS(h)
    • P(e);OGATE::QAR1(A)
    • P(g);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);
      • Vars
        • S(a);N_GUARD::S(B)
        • B(b);N_GUARD::QAB(A),XP(c)
        • S(a);N_GUARD::S(B),XS(a)
        • S(h);N_GUARD::S(B)
        • S(h);N_GUARD::S(B),XS(h)
        • P(e);OGATE::QAR1(A)
        • P(g);N_GUARD::R1(E)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD,XQ(A)::S(B)
        • P(d);OGATEB::QAB(A)
        • S(a);N_GUARD::S(B)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK,XP(e)
      • Vars
        • S(a);SBLOCK,XQ(A)::S(B)
      • Refutation
        • K(f);P-FLIGHT,XQ(A)
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(3)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Vars
      • P(d);OGATEB::QAB(A)
      • S(a);N_GUARD::S(B)
      • B(b);OGATE::QAB(A)
      • S(a);N_GUARD::S(B),XS(a)
      • S(h);N_GUARD::S(B)
      • S(h);N_GUARD::S(B),XS(h)
      • P(c);OGATEB::QAB(A),XB(b)
      • P(e);OGATE::QAR1(A)
      • P(g);N_GUARD::R1(E)
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