MESON Chess Problem Database

Problem Display
PID: 18686 (8/1n2Q3/2pr1p2/2R1p3/P1bkNN1R/K7/8/1BB5 w - - 0 1)

Retter, Yosef

San Francisco, 1957

8/1n2Q3/2pr1p2/2R1p3/P1bkNN1R/K7/8/1BB5

#2

9 + 7

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Se6#
    • 1...Ba2
      • 2.Se2#
    • 1...Be2
      • 2.Sxe2#
    • 1...Bb3
      • 2.Se2#
    • 1...Bd5
      • 2.Se2#
    • 1...Be6
      • 2.Se2#
    • 1...Bf7
      • 2.Se2#
    • 1...Bg8
      • 2.Se2#
    • 1...f5
      • 2.Qxe5#
  • Tries
    • 1.Rh3?
      • threat
        • 2.Bb2#
        • 2.Be3#
      • 1...exf4
        • 2.Bb2#
      • 1...Bd3!
    • 1.Qxd6+?
      • 1...Bd5
        • 2.Se2#
        • 2.Se6#
      • 1...Sxd6!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Qxe5#
      • 1...Kc3
        • 2.Se2#
      • 1...Kxc5
        • 2.Be3#
      • 1...Sxc5
        • 2.Se2#
      • 1...exf4
        • 2.Qe3#
        • 2.Qe5#
      • 1...Rd5
        • 2.Se2#
      • 1...Re6
        • 2.Se2#
      • 1...Bd5
        • 2.Se6#
      • 1...Be6
        • 2.Sxe6#
      • 1...e4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(e);N_GUARD,S_CUTB(a)::S(F)
    • B(a);N_GUARD::S(F)
    • B(a);N_GUARD::S(F),XB(a)
    • P(f);N_GUARD::QAB1(I),XP(c)
  • Tries
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(F)::B(B)
      • Refutation
        • B(a);
    • Try
      • Q(I);CHECK,XR(e)
      • Refutation
        • S(g);XQ(I)
  • Actual
    • S(E);XP(f)
    • Threat
      • QAB1(I),XP(c)
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::S(F)
      • K(b);P_SPINR(e),S_FLIGHT,XR(H)::B(B)
      • S(g);SBLOCK,XR(H)::R(G)+S(F),DCHECK
      • R(e);::R(G)+S(F),DCHECK
      • B(a);::R(G)+S(F),DCHECK
      • B(a);::R(G)+S(F),DCHECK,XB(a)
      • P(c);::QAB1(I)
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