MESON Chess Problem Database

Problem Display
PID: 225083 (8/1B3Q2/5P1K/8/1R2b1N1/1p3k1N/1r4pP/1R6 w - - 0 1)

Steel, William M

Sunday Chronicle, 1945

(First published on Sun Jan 21 1945)

8/1B3Q2/5P1K/8/1R2b1N1/1p3k1N/1r4pP/1R6

#2

9 + 5

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg4
      • 2.Qh5#
    • 1...Bd5
      • 2.Sg1#
    • 1...Bc6
      • 2.Sg1#
    • 1...Bxb7
      • 2.Sg1#
  • Tries
    • 1.Bxe4+?
      • 1...Kxg4
        • 2.Qh5#
      • 1...Ke2!
    • 1.Qe6?
      • threat
        • 2.Qxe4#
      • 1...Bxb7
        • 2.Sg1#
        • 2.Sg5#
        • 2.Rf4#
        • 2.Qe3#
      • 1...Re2
        • 2.Qf5#
      • 1...Bd5
        • 2.Sg1#
        • 2.Sg5#
        • 2.Bxd5#
        • 2.Rf4#
        • 2.Qe3#
      • 1...Bc6
        • 2.Sg1#
        • 2.Sg5#
        • 2.Bxc6#
        • 2.Rf4#
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qg6?
      • threat
        • 2.Qxe4#
      • 1...Bxb7
        • 2.Sg1#
        • 2.Qd3#
      • 1...Re2
        • 2.Qf5#
      • 1...Bd5
        • 2.Sg1#
        • 2.Qd3#
      • 1...Bc6
        • 2.Sg1#
        • 2.Qd3#
      • 1...Ke2!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxe4#
      • 1...Ke2
        • 2.Sg1#
        • 2.Qd1#
      • 1...Kxg4
        • 2.Qh5#
      • 1...Bxd5
        • 2.Sg1#
      • 1...Re2
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(I)
    • B(e);::S(C)
    • B(e);N_SPINB(e),XB(H)::S(C)
  • Tries
    • Try
      • B(H);CHECK,XB(e)
      • Vars
        • K(d);S_FLIGHT,XS(E)::QAB1(I)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(I);
      • Threat
        • QAB1(I),XB(e)
      • Vars
        • R(a);SBLOCK::QAR2(I)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(I);
      • Threat
        • QAB1(I),XB(e)
      • Vars
        • R(a);SBLOCK::QAR2(I)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAB1(I),XB(e)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(I)
      • B(e);XQ(I)::S(C)
      • R(a);SBLOCK::QAR2(I)
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