MESON Chess Problem Database

Problem Display
PID: 539 (3Q1b1n/r3p2K/p1PPPP1p/R1N1kn1r/2B2RP1/4p1BN/5p1q/1b6 w - - 0 1)

Anderson, Gerald Frank

1st Prize, The Observer, 1961

3Q1b1n/r3p2K/p1PPPP1p/R1N1kn1r/2B2RP1/4p1BN/5p1q/1b6

#2

13 + 13

788 US Problem Bulletin 1964
3174 The Two-move Chess Problem Tradition and Development 1966
5383 A Tribute to G F Anderson 1974
4640 Chess Wizardry: The New ABC of Chess Problems 1996
56 The Problemist 2003
4901 Best Problems 2007
133 The Problemist Supplement 2010
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg3+
      • 2.Sd3#
    • 1...Sd4+
      • 2.Sd3#
      • 2.Rf5#
    • 1...Sh4+
      • 2.Sd3#
    • 1...Sxd6+
      • 2.Sd3#
    • 1...Sg7+
      • 2.Sd3#
    • 1...exd6+
      • 2.Sd7#
    • 1...exf6+
      • 2.Sb7#
  • Keys
    • 1.Qb6!
      • threat
        • 2.Se4#
      • 1...Sd4+
        • 2.Rf5#
      • 1...Sxd6+
        • 2.Sd3#
      • 1...exd6+
        • 2.Sd7#
      • 1...exf6+
        • 2.Sb7#
      • 1...Kxd6
        • 2.Rd4#
      • 1...Kxf6
        • 2.Qb2#
      • 1...Be4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(f);CHECK,XB(A)::R(F)+S(G),DCHECK
    • S(f);CHECK::R(F)+S(G),DCHECK
    • S(f);CHECK,XP(I)::R(F)+S(G),DCHECK
    • P(k);CHECK,SBLOCK,XP(I)::R(F)+S(G),DCHECK
    • P(k);CHECK,XP(K)::R(F)+S(G)
  • Actual
    • Q(M);
    • Threat
      • R(F)+S(G)
    • Vars
      • S(f);CHECK,SBLOCK::B(A)+R(D),DCHECK
      • S(f);CHECK,SBLOCK,XP(I)::R(F)+S(G),DCHECK
      • P(k);CHECK,SBLOCK,XP(I)::R(F)+S(G),DCHECK
      • P(k);CHECK,SBLOCK,XP(K)::R(F)+S(G)
      • K(e);S_FLIGHT,XP(I)::B(A)+R(D),DCHECK
      • K(e);P_SPINS(f),S_FLIGHT,XP(K)::QAB(M)
      • B(a);::R(F)+S(G),XB(a)
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Developed and maintained by Brian Stephenson.
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