MESON Chess Problem Database

Problem Display
PID: 45886 (6b1/1B2R3/3p2p1/1p1rPp1p/3N1kr1/QR6/K2N1Pp1/2B3n1 w - - 0 1)

Avner, Uri

6th Comm., Israel Ring Ty., 1981

6b1/1B2R3/3p2p1/1p1rPp1p/3N1kr1/QR6/K2N1Pp1/2B3n1

#2

10 + 11

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.S2f3#
    • 1...Rc5
      • 2.Sc4#
    • 1...Rxe5
      • 2.Se4#
  • Tries
    • 1.Se2+?
      • 1...Kg5
        • 2.Sf3#
      • 1...Sxe2!
    • 1.Rf3+?
      • 1...Sxf3
        • 2.Qe3#
      • 1...Kg5!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qe3#
      • 1...Rxd4+
        • 2.Sb3#
      • 1...Rc5+
        • 2.Sc4#
      • 1...Rxe5+
        • 2.Se6#
      • 1...Kg5
        • 2.S2f3#
      • 1...Rg3
        • 2.Qxg3#
      • 1...Rh4
        • 2.Qg3#
      • 1...Rg5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::B(A)+S(C),DCHECK
    • R(f);P_PINR(F)::B(A)+S(C)
    • R(f);P_PINR(F),XP(H)::B(A)+S(C)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::B(A)+S(C),DCHECK
      • Refutation
        • S(a);XS(G)
    • Try
      • R(F);CHECK
      • Vars
        • S(a);XR(F)::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAB1(E)
    • Vars
      • R(f);CHECK,P_SPINR(f),XS(G)::B(A)+S(C)
      • R(f);CHECK::B(A)+S(C)
      • R(f);CHECK,SBLOCK,XP(H)::R(F)+S(G),DCHECK
      • K(c);S_FLIGHT::B(A)+S(C),DCHECK
      • R(d);N_GUARD::QAB1(E),XR(d)
      • R(d);N_GUARD::QAB1(E)
      • R(d);SBLOCK::R(F)+S(G),DCHECK
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