MESON Chess Problem Database

Problem Display
PID: 182248 (8/7Q/8/1p6/1K6/3Nk3/8/3B2R1 w - - 0 1)

Dobbs, Gilbert S

British Chess Magazine, 1906

8/7Q/8/1p6/1K6/3Nk3/8/3B2R1

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf2!
    • 1.Re1+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qd7#
      • 1...Kd2!
    • 1.Qe4+?
      • 1...Kd2
        • 2.Qe2#
      • 1...Kxe4!
    • 1.Qd7?
      • 1...Ke4
        • 2.Re1#
      • 1...Kd2!
  • Keys
    • 1.Sf2!
      • 1...Kd2
        • 2.Qh6#
      • 1...Kxf2
        • 2.Qa7#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#

This anticipates 231625(1927), 108823(1937), 18870(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAB(E)
      • K(a);S_FLIGHT,XS(C)::QAB(E)
      • K(a);S_FLIGHT::QAR1(E)
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