MESON Chess Problem Database

Problem Display
PID: 175717 (8/8/4p1Qp/2B1N2r/2K1pk2/5B2/8/8 w - - 0 1)

Thomas, WG

1st Prize, Sydney Morning Herald, 1898

8/8/4p1Qp/2B1N2r/2K1pk2/5B2/8/8

#2

5 + 5

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Qg4#
    • 1...exf3
      • 2.Sd3#
  • Tries
    • 1.Bxh5?
      • 1...e3
        • 2.Sd3#
      • 1...Kxe5!
    • 1.Qxe4+?
      • 1...Kg5
        • 2.Be7#
      • 1...Kg3!
  • Keys
    • 1.Bf2!
      • 1...Kxe5
        • 2.Bg3#
      • 1...Rxe5
        • 2.Qg4#
      • 1...exf3
        • 2.Sd3#
      • 1...Rh1
        • 2.Qf6#
      • 1...Rh2
        • 2.Qf6#
      • 1...Rh3
        • 2.Qf6#
      • 1...Rh4
        • 2.Qf6#
      • 1...Rf5
        • 2.Qg3#
      • 1...Rg5
        • 2.Qxe4#
      • 1...e3
        • 2.Bg3#

This anticipates 107680(1968)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XS(D)::QAR1(E)
    • P(a);N_GUARD,SBLOCK,XB(A)::S(D)
  • Tries
    • Try
      • B(A);XR(c)
      • Vars
        • P(a);N_GUARD::S(D)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • Q(E);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(b);S_FLIGHT,XS(D)::B(C)
      • R(c);SBLOCK,XS(D)::QAR1(E)
      • P(a);N_GUARD,SBLOCK,XB(A)::S(D)
      • R(c);N_GUARD::QAR2(E)
      • R(c);SBLOCK::QAB1(E)
      • R(c);SBLOCK::QAR1(E),XP(a)
      • P(a);SBLOCK::B(C)
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