MESON Chess Problem Database

Problem Display
PID: 21042 (7Q/2p5/1P1N3R/3k4/8/2K5/8/8 w - - 0 1)

Bettmann, Henry Wald

Marble, Murray

Pittsburgh Gazette-Times, 1915

7Q/2p5/1P1N3R/3k4/8/2K5/8/8

#2

5 + 2

3360 Simple Two-move Themes 1924
5501 Chess Cameos 1936
70 American Chess Problemist 1949
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1952
2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984
721 Variantim 1988
3310 2345 Chess Problems 1997
5626 European Junior Chess Solving Championship 2005
145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qd4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc5
        • 2.Qe5#
      • 1...c5
        • 2.Qe5#
        • 2.Qa8#
      • 1...Ke4!
    • 1.Sf7?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc5
        • 2.Qe5#
      • 1...c5
        • 2.Qe5#
        • 2.Qa8#
      • 1...Ke4!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe5!
  • Keys
    • 1.Qe8!
      • 1...Kc5
        • 2.Qb5#
      • 1...cxb6
        • 2.Qb5#
      • 1...cxd6
        • 2.Rh5#
      • 1...c5
        • 2.Qe4#
      • 1...c6
        • 2.Qh5#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR1(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
  • Actual
    • Q(E);
    • Vars
      • K(a);P-FLIGHT::QAR1(E)
      • P(b);N_GUARD,XP(B)::QAR2(E)
      • P(b);SBLOCK,XS(C)::R(D)
      • P(b);SBLOCK::QAB1(E)
      • P(b);SBLOCK::QAR(E)
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