MESON Chess Problem Database

Problem Display
PID: 6224 (K4BB1/1Q6/5p2/8/2R2r1r/N2N2q1/kp1p1p1p/b7 w - - 0 1)

Schiffmann, Israel Abraham

1st Prize, Bristol Times and Mirror, 1927/II

K4BB1/1Q6/5p2/8/2R2r1r/N2N2q1/kp1p1p1p/b7

#2

7 + 10

58 Tijdschrift vd NSB 1931
461 Schach-Express 1949
21 Deutsche Schachblatter 1962
1397 Faszinierendes Schachproblem 1963
5862 An ABC of Chess Problems 1970
3098 FIDE Album (1914-1944) (I) 1971
102 Probleemblad 1974
4640 Chess Wizardry: The New ABC of Chess Problems 1996
6455 The Chessboard Adventures of Norman Macleod 1996
133 The Problemist Supplement 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Re4#
    • 1...Qf3
      • 2.Re4#
    • 1...Rf3
      • 2.Rg4#
    • 1...Rfg4
      • 2.Rxg4#
    • 1...b1Q
      • 2.Rc2#
      • 2.Qxb1#
    • 1...b1S
      • 2.Rc2#
      • 2.Qxb1#
    • 1...b1B
      • 2.Rc2#
      • 2.Qxb1#
    • 1...b1R
      • 2.Rc2#
      • 2.Qxb1#
  • Tries
    • 1.Rc3+?
      • 1...Rc4
        • 2.Sb4#
        • 2.Qb3#
      • 1...Qxg8!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sb4#
      • 1...Qxf3+
        • 2.Re4#
      • 1...Kb3
        • 2.Sc1#
      • 1...Rxf3
        • 2.Rg4#
      • 1...b1Q
        • 2.Rc2#
      • 1...b1S
        • 2.Rc2#
      • 1...b1B
        • 2.Rc2#
      • 1...b1R
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_GUARD::B(G)+R(C)
    • Q(g);N_GUARD,P_PINQ(D)::B(G)+R(C)
    • R(h);OGATE::B(G)+R(C)
    • R(h);OGATE::B(G)+R(C),XR(h)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • Q(g);P_PINB(F),XB(G)
  • Actual
    • Q(D);
    • Threat
      • S(B)
    • Vars
      • Q(g);CHECK,N_GUARD,XQ(D)::B(G)+R(C)
      • K(b);S_FLIGHT::QAR(D)+S(B),DCHECK
      • R(h);OGATE,XQ(D)::B(G)+R(C)
      • P(c);::B(G)+R(C),DCHECK
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