MESON Chess Problem Database

Problem Display
PID: 18784 (8/1p3Q2/4p1K1/2P5/1N1Pk3/1R3N2/8/2b2B2 w - - 0 1)

Wertheim, David R

1st Place, Match: Israel - Sweden, 1958

8/1p3Q2/4p1K1/2P5/1N1Pk3/1R3N2/8/2b2B2

#2

8 + 4

3976 FIDE Album (1956-1958) 1961
3147 Chess Problems: Introduction to an Art 1963
3841 The Art of Israeli Chess Composition 1983
3310 2345 Chess Problems 1997
145 StrateGems 2008
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Bd3#
    • 1...Bf4
      • 2.Qxb7#
    • 1...e5
      • 2.Qf5#
  • Tries
    • 1.Ba6?
      • threat
        • 2.Bxb7#
      • 1...b5
        • 2.Bb7#
      • 1...b6
        • 2.Bb7#
      • 1...bxa6!
    • 1.Re3+?
      • 1...Bxe3
        • 2.Bd3#
      • 1...Kxe3!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Be3
        • 2.Bd3#
      • 1...e5
        • 2.Qxe5#
        • 2.Qf5#
      • 1...Bf4!
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Bf4
        • 2.Qxb7#
      • 1...Be3!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qxb7#
      • 1...exd5
        • 2.Qf5#
      • 1...Be3
        • 2.Sc3#
      • 1...Bf4
        • 2.Sf6#
      • 1...e5
        • 2.Bd3#

This anticipates 103934(1959), 135283(1959)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(A)
    • B(a);SBLOCK::QAB(H),XP(d)
    • P(c);N_GUARD::QAB1(H)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A),XP(d)
      • Vars
        • P(d);::B(A)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(B);CHECK
      • Vars
        • B(a);SBLOCK,XR(B)::B(A)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • B(a);SBLOCK::B(A)
      • Refutation
        • B(a);
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • P(c);::QAR1(H),XP(c)
        • B(a);SBLOCK::QAB(H),XP(d)
      • Refutation
        • B(a);
  • Actual
    • S(D);
    • Threat
      • QAR2(H),XP(c)
    • Vars
      • K(b);OGATEB,P_SPINP(c),S_FLIGHT,XS(D)::QAB(H),XP(d)
      • P(c);N_GUARD,XS(D)::QAB1(H)
      • B(a);SBLOCK::S(D)
      • P(c);::B(A)
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